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CR 91-263 Knollwood Street ImprovementsNovember 26, 1991 Proposed Action. Staff recommends the following motion: Move that Council adopt Resolution 91 -149, Resolution Ordering Improvement After Public Hearing, Knollwood Street Reconstruction, Project 90 -01. This action will continue an assessable project on the streets in the Knollwood neighborhood. Plans and specifications will be developed and bids solicited for construction in the spring of 1992. Overview. The Council at its August 6, 1991 meeting ordered that a feasibility report concerning Knollwood street improvements be prepared. That report was presented to the Council on November 19 and given approval at that time. Council also authorized a public hearing concerning such a project for December 3, 1991. Public information meetings with the Knollwood Association have been held and issues of street width, alternate types of curbing, utility repair, trees, construction schedule and assessments were discussed. Ten days mailed notice and two weeks published notice of the December 3 hearing have been given. Attached to this report . you will find a mailing list and a map of all parcels notified. Primary Issues to Consider. Knollwood Street Improvements Public Hearing Council Report: 91 -263 o Recommendations in the feasibility report o Resident concerns with a reconstruction project o Project cost o Deletion of parcels from project involvement o Staff recommendation Supporting Information. 0 0 Notice of Hearing of Improvement Feasibility report Minutes of November 25 neighborhood information meeting Resolution 91 -149 James Gessele Engineering Superintendent Analysis. Recommendations in the feasibility report An executive summary found near the beginning of the feasibility report as prepared by RLK Associates Ltd. outlines the consultant's recommendations concerning this project. The following analysis further synopsizes staff and consultant positions. Right of Way/ easements The City needs to obtain various easements to memorialize storm ponds, drainage /utility lines, and alignment of the roadway. Storm sewer The present storm sewer system needs to be reconstructed for the most part, sedimentation basins installed within the ponds, and local drainage problems addressed and tied to the general storm system. Sanitary sewer Approximately one -half of the existing sanitary mains needs to be replaced and the sewer line under the garage at 602 Edgemoor Drive eliminated. The City should actively encourage reconstruction of private services if there is a need. Water main Approximately 3,400 feet of cast iron pipe should be replaced with ductile iron pipe and new pipe installation undertaken to complete a looping system. The City should actively encourage reconstruction of lead pipe services. Street Roadways should be reconstructed with concrete surmountable curb and gutter, at a driving surface width of 20 feet or 22 feet wide back -to -back. Parking should be restricted on 20 foot wide streets in keeping with minimum standards required by the State Fire Code. Alleyway The current alley should be reconstructed with concrete per City Roadway Policy 8 -B and assessed to benefitting properties. Landscaping Design and specifications should call for minimum tree removal, replacement of trees with 4 " -6" size caliper, protection of trees with retaining walls, landscape amenities at pond's edge and along Edgemoor Drive. Street lighting An optional feature based on neighborhood request would be to install ten new ornamental street lights. Construction scheduling An improvement project should be predicated on a construction schedule beginning May 18 and completion by mid - October 1992. Construction phasing can be specified as a means of minimizing inconvenience to residents. o Resident concerns with a reconstruction project The public hearing setting will afford the best opportunity to measure residential sentiments. Staff and the consultant has been able to measure reaction to issues raised in the feasibility report and Council can gauge neighborhood sentiments by reading the attached minutes of the November 25 neighborhood information meeting. Discussions have been open, frank and at all times congenial. The residents do take issue with staff positions on cost sharing of concrete curb and gutter, roadway width and reconstruction of the alley. Although the neighborhood petitioned for street reconstruction with bituminous curbs, it appears residents would be willing to accept colored concrete curb and gutter. The cost of street construction with bituminous curbs is estimated at $499,000, with colored concrete curb and gutter at $517,000. Residential sentiment is for the City to assume 100% of the cost differential. Residents petitioned for a twenty foot roadway width measured back -to -back of curb. The City's position, gleaned from Roadway Policy 8 -B, is that the twenty feet are measured from face to face of curbs. This is in keeping with State Fire Code requirements. The alley serving 410 Cottage Downs and 810 and 804 Valley Way is considered by residents to be an unnamed street and as such should be reconstructed with bituminous surfacing. An alternative calling for bituminous surface with either bituminous or concrete curbing has been suggested, but the City's position has been to adhere to Roadway Policy 8 -B and install a concrete alley. o Project cost The consultant estimates a total project cost of $834,000 including overhead. This is for a project that encompasses those recommendations made in the executive summary of the report and as outlined in the above analysis. City costs are estimated to be •• $455,000, property owner costs $379,000. Using the adjusted front foot formula as outlined in the City's assessing policy, assessments would range from $6,300 to $11,000 per property. o Deletion of parcels from project involvement Public hearing notices were mailed to all property owners in Knollwood. This included the addresses 601, 707, 711, 715, 805 and 809 Oakridge Road. These parcels, except 601, should be deleted from further consideration to remove them from possible pending assessment status. The resident at 601 Oakridge Road is interested in construction of concrete curbing on Oakridge to the T.H. 7 intersection and would be subject to curb assessments should construction of such a feature be found feasible. o Staff recommendation Staff recommends that a project be undertaken as outlined in the feasibility and that Council adopt Resolution 91 -149 ordering a public improvement. TO WHOM IT MAY CONCERN: NOTICE OF HEARING OF IMPROVEMENT WHEREAS, the City Council of the City of Hopkins, Hennepin County, Minnesota, deems it necessary and expedient that the improvement hereinafter described, be made, NOW, THEREFORE, notice is hereby given that the City Council will hold a public hearing on said improvement at the following time and place within the said city: DATE: December 3, 1991 TIME: 7:30 p.m. LOCATION: City Hall Council Chambers 1010 1st Street S. Hopkins, MN 55343 The general nature of the improvement is the construction of streets and storm sewer and inspection and repair of sanitary sewer, water main, gas and electrical utilities, City Project 90- 01. Cottage Downs, Park Terrace, Bridle Lane, Valley Way, Wilshire Walk, Edgemoor Drive, Oakridge Road, and Alleyway off Cottage Downs. THE TOTAL ESTIMATED COST OF SAID IMPROVEMENT IS $900,000.00. It is proposed to assess every lot, piece or parcel of land benefited by said improvement whether abutting thereon or not, based upon benefits received without regard to cash valuation. Persons desiring to be heard with reference to the proposed improvement should be present at this hearing. This Council proposes to proceed under the authority granted by Chapter 429 MSA. jghearng Dated this 19th day of November, 1991. Publish: Hopkins Sai`or November 20 and 27, 1991 BY ORDER OF THE CITY COUNCIL A. Genellie, City Clerk ty of Hopkins, Minnesota AFFIDAVIT OF MAILING PUBLIC HEARING NOTICE STATE OF MINNESOTA SS. COUNCIL OF HOPKINS James A. Genellie, being first duly sworn, deposed and says: I am a United States citizen, over 21 years of age, and the City Clerk of the City of Hopkins, Minnesota. On October 20, 1991, acting on behalf of the said city, I deposited in the United States post office at the City of Hopkins, Minnesota, copies of the attached notice of hearing on proposed street and storm sewer construction, City Project 90 -01, enclosed in sealed envelopes, with postage thereon fully prepaid, addressed to the following persons at the addresses appearing on the attached copy of the mailing list. There is delivery service by United States mail between the place of mailing and the places so addressed. Signature Subscribed and sworn to before me this 20th day of October, 1991. 6 904 0 :41/,61/ Notary Public JAMES T. GESSELE NOTARY PUBLIC— MINNESOTA HENNEPIN COUNTY My commission expires 349 - List:Nov mb r 19, 1991 90 -01 PIN #: 24- 117 - 22 11 0041 RICHARD K. SHAPIRO 710 EDGEMOORE DRIVE HOPKINS, MN 55343 PIN #: 24 -117 -22 11 0042 BENJAMIN A. COHEN 602 EDGEMOORE DRIVE HOPKINS, MN 55343 PIN #: 24- 117 -22 11 0043 SCOTT STEIN 122 WILSHIRE WALK HOPKINS, MN 55343 PIN #: 24-117-22 11 0044 ALVIN R. TILSEN 208 WILSHIRE WALK HOPKINS, MN 55343 PIN #: 24-117-22 11 0045 ROBERT & KAREN RABINOVITZ 216 WILSHIRE WALK HOPKINS, MN 55343 PIN #: 24- 117 -22 11 0046 DARLA R. KJELDEN 306 WILSHIRE WALK HOPKINS, MN 55343 PIN #: 24- 117 -22 11 0647 BRUCE M. GOLDSTEIN 312 WILSHIRE WALK HOPKINS, MN 55343 PIN #: 24- 117 -22 11 0048 GEO NADLER 408 WILSHIRE WALK HOPKINS, MN 55343 PIN #: 24- 117 -22 11 0049 HERBERT Z. ROSEN 601 OAKRIDGE ROAD HOPKINS, MN 55343 PIN #: 24- 117 -22 11 0050 ERIC BLOCK & HELLA BUCHHEIM 414 WILSHIRE WALK HOPKINS, MN 55343 PIN #: 24- 117 -22 110053 D. W. & J. A. JOHNSON 705 VALLEY WAY HOPKINS, MN 55343 PIN #: 24-117-22 11 0054 MICHAEL & KATHERINE MURPHY 203 WILSHIRE WALK HOPKINS, MN 55343 PIN #: 24- 117 -22 11 0055 MICHAEL & KATHERINE MURPHY 203 WILSHIRE WALK HOPKINS, MN 55343 PIN #: 24- 117 -22 11 0056 RICHARD K. SHAPIRO 710 EDGEMOORE DRIVE HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0001 RICHARD K. SHAPIRO 710 EDGEMOORE DRIVE HOPKINS, MN 55343 PIN #4 13-117-22 44 0002 MICHAEL & KATHERINE MURPHY 203 WILSHIRE WALK HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0003 CHARLES D. SIMPSON 301 WILSHIRE WALK HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0004 D. W. & J. A. JOHNSON 705 VALLEY WAY HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0005 HOWARD P. & ROBERTA J. LISZT 715 VALLEY WAY HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0006 DONALD E. LITIN 302 BRIDLE LANE HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0007 OREN J. STEINFELDT 240 BRIDLE LANE HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0008 MANUEL O. JAFFE MD 102 BRIDLE LANE HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0009 ARNOLD M. SOSKIN 802 EDGEMOORE DRIVE HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0010 DENNIS P. & SUSAN B. BRUESEHUFF 810 EDGEMOORE DRIVE HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0011 ROGER J. & MARILYN T. HORK 820 EDGEMOORE DRIVE HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0012 ARTHUR J. HOROWITZ 830 EDGEMOORE DRIVE HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0013 JACOB R. GOLDENBERG 210 COTTAGE DOWNS HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0014 ROBERT L. & LINDA M. BARROWS 821 PARK.TERRACE HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0015 HAROLD COTTLE 302 COTTAGE DOWNS HOPKINS, MN 55343 PIN #: 13 -117 -22 44 0016 NANCY G. SHILLER 825 PARK TERRACE HOPKINS, MN 55343 List:Nov mb r 19, 1991 90 -01 PIN #: 13- 117 -22 44 0017 PAUL & CARLYN BLUM 815 PARR TERRACE HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0018 JACK P. HELMS 805 PARK TERRACE HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0019 A S RESNICK 105 COTTAGE DOWNS HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0020 JUNE BARRON 115 COTTAGE DOWNS HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0021 HENRY RIEL 215 COTTAGE DOWNS HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0022 MARTIN K. & LAURA W. LIPSHUTZ 225 COTTAGE DOWNS HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0023 SUSAN A. & CLIFFORD F. LAKE JR 275 COTTAGE DOWNS HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0024 MAXEEN L. VASHRO 315 COTTAGE DOWNS HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0025 SCOTT & LAUREL LIFSON 325 COTTAGE DOWNS HOPKINS, MN 55343 PAUL A. HIMMELMAN 405 COTTAGE DOWNS HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0026 PIN #: 13-117-22 44 0027 KENNETH D. & SUSAN D. KAHN 409 COTTAGE DOWNS HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0031 EFROM H. ABRAMSON 711 OAKRIDGE ROAD HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0032 ALBERT L. WALONICK 715 OAKRIDGE ROAD HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0033 STANFORD A. & JOAN S. WEINER 805 OAKRIDGE ROAD HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0034 R S SHIFF & N JAFFEE -SHIFF 809 OAKRIDGE ROAD HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0035 ROBERT L. DVORSKY 410 COTTAGE DOWNS HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0036 LOUIS GAINSLEY 428 COTTAGE DOWNS HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0037 JACK SWEET 420 COTTAGE DOWNS HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0038 RANDY L. & WENDY S. ENGEL 810 VALLEY WAY HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0039 MARION APPLE . 804 VALLEY WAY HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0040 RONALD L. SIMON 716 VALLEY WAY HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0041 NORMAN L. & RUTH D. KAHN 712 VALLEY WAY HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0045 BILL KEENAN c/o BT INVESTORS 1055 B. WAYZATA BLVD WAYZATA, MN 55391 PIN #: 13-117-22 44 0046 BILL KEENAN c/o BT INVESTORS 1055 E. WAYZATA BLVD WAYZATA, MN 55391 PIN #: 13- 117 -22 44 0047 THOMAS R. & SHERRY W. KELLY 413 COTTAGE DOWNS HOPKINS, MN 55343 PIN #: 13- 117 -22 44 0048 DENNIS M. & PATRICIA M. CURRY 417 COTTAGE DOWNS HOPKINS, MN 55343 PIN #: 19- 117 -21 22 0035 RICHARD NESLUND 15500 WAYZATA BLVD WAYZATA, MN. 55391 PIN #: 19- 117 -21 22 0036 CHEYENNE LAND COMPANY 15500 WAYZATA BLVD WAYZATA, MN 55391 PIN #: 13- 117 -22 44 0043 THE KNOLLWOOD ASSOC. 821 PARK TERRACE HOPKINS, MN 55343 *0 • 107 63 0 3 (2 6e 4.19 s COTTAGE (45) *81.50 (10) *70.2 ZEE ., Sig M■1 74 195 8 ' fi f 1 4 (40) u . � ..� . 1 .o�.J1'u..:, � •-' ? bt °_� (48) lay! v'(56) PARCELS NOTIFIED FOR PUBLIC HEARING —54—ATE-44-r— - eye --�- „61'5 . 19.72 • • RO 667* ACRES „., 1 ( 27 '/ (64) 1 (63) = 9 (62) (6)) 107.55 - ER 2 ,n 23 EAST ( 60) AS (60) 22 ( 59) (58) 8 O LJ' Pt (27) (104 -109 11 (40-45) (24-31) NOVE 236.3 (118.121 (122-129 72 73 LO 2AW (110-117 1 *4.29 _ _ KNOLLWOOD NEIGHBORHOOD � RIK ASSOCIATES, LTD. STREET AND UTILITY RECONSTRUCTION PLANNING AND ENGINEERING FEASIBILITY REPORT November 11, 1991 Revised - November 15, 1991 PREPARED FOR: THE CITY OF HOPKINS AND THE RESIDENTS OF KNOLLWOOD PREPARED BY: 922 Mainstreet Hopkins, Mn. 55343 (612) 933 -0972 fax: (612) 933 -1153 , RIK 411 ASSOCIATES LTD. November 15, 1991 Honorable Mayor and City Council City of Hopkins 1010 South First Street Hopkins, MN 55343 Re: Feasibility Study - Knollwood Neighborhood; Street and Utility Reconstruction Enclosed is the planning and engineering report regarding the feasibility study for street and utility reconstruction in the Knollwood Neighborhood. This report includes information from the original TKDA report dated January 11, 1990, updated information from City staff, RLK evaluation of the data and site conditions, and input from the residents of the Knollwood neighborhood. The intent of this report is to explore options for the reconstruction of the Knollwood streets and utility infrastructure based upon the petition submitted by the neighborhood August 6, 1991 requesting street, storm sewer, water main and sanitary sewer reconstruction. The petition requested construction of a minimum width roadway with asphalt curb vs. the city -wide standard of concrete curb and gutter. Discussion on the scope of the project was held with the neighborhood design committee on October 8, 1991, and the Knollwood residents on October 28, 1991. Their comments are attached in the form of minutes and a list of attendees is included. A questionnaire was handed out to all of the residents by the Knollwood Association. Most of the questionnaires were returned (attached in the appendix). Information directly from the residents articulating their concerns and needs are extremely valuable. Additional meetings will be necessary with the neighborhood to finalize design options, roadway alignment, roadway width and edge control. It is a principal goal to continue the high level of communications between the neighborhood residents, the City staff, and the consultant throughout the duration of this project. The tables and figures included with this report provide a visual description of a series of alternatives which have been explored on the Knollwood street design options. The neighborhood residents have been supplied with copies of this report for their review. We realize recommendations within this report will be used as the basis for discussion as to what the final design of the street will eventually represent. Our goal has been to collect, analyze, interpret and report on the design data needed by the City Council, City staff and Knollwood residents to evaluate the project. We believe this report accomplishes that goal. • Civil Engineering • Transportation • Infrastructure Redevelopment • Landscape Architecture • Construction Management 922 Mainstreet Hopkins, Mn. 55343 (612) 933 -0972 fax: (612) 933 - 1153) Honorable Mayor and City Council November 15, 1991 Page 2 We are pleased to be of service to the City and the Knollwood neighborhood in the Feasibility phase of the project. It is our hope that the data has been presented in a clear fashion to allow the necessary discussion on the project prior to the commencement of the detailed design phase. We will attend the November 19, 1991 City Council meeting, and subsequent public hearings, to review the report and discuss the various alternatives included herein. Sincerely, RLK ASSOCIATES, LTD. €'97 Richard L. Koppy, P.E. President attachments dk :Feasstdy.Knl \WS WS /HOPKINS /KNOLL /FEASSTDY KNL I hereby certify that this report was prepared by me or under my direct supervision and that I am a duly Registered Professional En•ineer under t e laws of the State of Minnesota. 11 411 .6. . /• � � L :L . Paul Kroehnert, P.E. KNOLLWOOD STREET RECONSTRUCTION PROJECT Reg. No. ti./ rim Date I hereby certify that this report was prepared by me or under my direct supervision and that I am a duly Registered Professional Landscape Architect under the laws of the State of Minnesota. /97 11 John Dietrich, ASLA Reg. No. Date I hereby certify that this report was prepared by me or under my direct supervision and that I am a duly Registered Professional Engi er under the laws of the State of Minnesota. Richard L. Koppy, P E. Reg. No. 11083 ate TABLE OF CONTENTS PLANNING AND ENGINEERING FEASIBILITY STUDY REPORT SECTIONS PAGE Executive Summary Project Schedule Summary of Estimated Project Costs & Assessment Data Planning and Engineering Feasibility Report Project Location 1 Study Objective 1 Mission Statement 1 History 3 Planning and Engineering for the Knollwood Project 4 Right of Way /Easements 4 Utilities 5 Storm Sewer System Serving Area 5 Sanitary Sewer Reconstruction 13 Watermain System Reconstruction 21 Private Utilities 22 Street Analysis 24 Alleyway (Public Drive) 34 Miscellaneous Design Items 37 Landscaping and Retaining Walls 37 Street Lighting 40 Coordination with the City of St. Louis Park 40 Traffic Problems, Vehicular and Pedestrian 42 Construction Schedules and Phasing 43 Permits for Construction 45 Financing 45 Statement of Project Feasibility 47 TABLES AND FIGURES Figure 1 Location Map 2 Figure 2 Tree Removal and Parking Areas 6 Figure 3 Existing Storm Sewer 7 Figure 4 Sedimentation Basin Detail 9 Figure 5 Typical Castings Detail 10 Figure 6 Alternate A - Bituminous Curb 12 Figure 7 Proposed Storm Sewer 14 Figure 8 Proposed Storm Sewer with Underdrains 15 Figure 9 Existing Sanitary Sewer and Water Main 16 Figure 10 Sanitary Sewer - Alternate Routes 18 Figure 11 Proposed Sanitary Sewer 20 Figure 12 Proposed Water Main 23 Figure 13 Typical Section - Alternate B 28 Figure 14 B618 Concrete Curb and Gutter Detail 29 Figure 15 Typical Section - Alternates C and D 30 Figure 16 Mountable Concrete Curb and Gutter Detail 31 Figure 17 Typical Section Alternate E 32 Figure 18 Typical Section - Alternate F 33 Figure 19 Alley Detail 35 Figure 20 Tree Loss Impact 39 Figure 21 Alternative Street Lighting 41 Figure 22 Construction Phasing 44 Figure 23 Sample Assessment 48 Figure 24 Driveway Openings 49 EXEMTIVE SUMMARY Planning and Engineering Feasibility Report Study Objective: Enhancement of a residential neighborhood to the extent that the residents are comfortable and satisfied to be residing in their local environment. At the same time, providing an infrastructure and physical improvement plan that relates to the City's general physical plant allowing public services to be performed effectively, efficiently and at a cost that is equitable with other neighborhoods throughout the City. Recommendation: Based on this study, the Knollwood Street and Utility reconstruction is feasible and the resulting benefit will equal or exceed the proposed assessments to the abutting properties. It is therefore recommended that the Hopkins City Council proceed with the project as suggested in the Project Schedule. It is recommended the final assessment hearing be held for the first segment prior to awarding a contract as shown on the proposed Project Schedule. Proiect Cost: The overall project cost for the Knollwood street and utility reconstruction is estimated to be $833,791. This estimate includes the construction cost, overhead and consultant fees. A preliminary assessment roll is included with the report. It has been prepared based upon Policy #7- D. Content of Feasibility Report: Right of way/easements Recommendations Obtain drainage and utility easement for ponds and all utility lines Obtain easements for roadway to allow the street to be maintained in its general alignment. Easements would have to be granted by property owner prior to construction with costs of right of way to offset assessment costs. Storm Sewer Recommendations Reconstruct storm sewer system as shown on Figure 7 including sedimentation basins within the ponds in order to improve water quality. o Include private property drainage areas into overall system. Outflow of storm water to Minnehaha Creek will not exceed current levels. Sanitary Sewer Recommendations o Reconstruction of approximately 50% of sanitary trunk line as shown on Figure 11. o Eliminate sanitary sewer under 602 Edgemoor garage o Encourage private service reconstruction if the need is appropriate. o Replace any lines which may need replacement in the next 15 -20 years. This is being evaluated as part of the sanitary sewer television and cleaning program that is on -going in the Knollwood neighborhood. A final report should be available by December 3, 1991. Water Main Recommendation o Replace approximately 3,400 lineal feet of cast iron pipe with ductile iron pipe as shown on Figure 12. o Complete two dead end watermains with loop routes o Encourage private service reconstruction if lead lines exist between street and house service. Street Analysis Recommendation o Maintain general alignment for new roadway o Street width driving surface 20' with back of edge control at 22' width as shown on Figure 15. o Utilize colored concrete mountable curb and gutter for edge control o Anticipate life expectancy of 35 years Driveway aprons are not to be installed o Parking may be restricted on 20' wide streets o Narrow roadway where significant trees /landscape features are existing. Reconstruct Edgemoor Drive with concrete curb /gutters on both sides. o Replace /repair all private utilities during the period of construction. Alleyway - Unnamed Roadway Recommendation o Construct in concrete per City policy and assess to benefiting properties (see Figure 19) o Option to vacate alleyway and maintain as a private drive Landscape and Retaining Walls Maintain rural character of roadway and yard appearance O Proactive tree services to reduce tree loss Replacement plant material to be significant in size, size It - 6 " caliper Provide landscape installation at pond edge, Edgemoor buffer, and boulevard plantings Maintain existing walls where possible Install retaining walls where applicable to protect trees Tree removal to be kept to a minimum Enhance buffer area on the east side of Edgemoor Drive Street Lighting Provide additional lights where requested Installation of a new ornamental street lighting system proposed to consist of 10 lights. See Figure 21 for a sample ornamental light. Construction Scheduling Project to begin May 18 and be completed by mid - October 1992 Minimize the inconvenience to residents accessing their property at all times. Refer to Figure 22 for a tentative construction phasing. Phase 1 Initial Feasibility Study RLK Completion Date Council orders public hearing Publish in Sailor Property Owner Meetings Public Hearing Phase II Design Design Development Final design, contract document, specifications RLK Completion Date Phase III Bidding RLK Completion Date Council approves plans, orders bids Bid ads in Sailor Bid Opening Phase IV Assessments Council orders assessment hearing Ad in Sailor Property owner meetings Assessment Hearing Award of Bid Phase V Construction Engineering PROJECT SCHEDULE OCTOBER 28, 1991 KNOLLWOOD NEIGHBORHOOD IMPROVEMENT PROJECT Construction begins after road restrictions lifted November 8, 1991 November 19, 1991 November 20, 27, 1991 October 28, 1991 November 20, 25, 1991 December 3, 1991 November 19, 1991 January 1, 1992 January 1, 1992 thru February 19, 1992 February 14, 1992 February 27, 1992 February 18, 1992 February 19, 26 and March 4, 1992 March 11, 1992 March 17, 1992 March 18, 25, 1992 March 16 thru 27, 1992 April 7, 1992 May 12, 1992 May 18, 1992 • Project Description Streets (Alternate C) Storm Sewer Sanitary Sewer Watermain Alternate Items: Alley south of Cottage Downs Colored concrete for Curbs Sprinkler system adjustments EXPENDITURES AND REVENUE SUMMARY PROJECT COSTS Total Project City Costs Costs $483,324 $119,717 $ 90,857 $ 98,020 $ 6,045 $ 34,528 $ 1,300 $144,997 $119,717 $ 90,857 $ 98,020 $ 1,209 _ 0 _ 0 Project Total Cost Estimates $833,791 $454,800 $378,991 (includes 10% project contingency, 15% engineering, 5% administration) PRELIMINARY ASSESSMENT INFORMATION In accordance with Policy #7 -D Total Estimated Project Cost: $833,790 Total number of assessable residential lots: 48 Total number of adjusted assessable frontage: $5,922.65 City Cost: $454,800 Property Owner Cost: $378,991 Project Cost (rate per foot) $140 Assessment Rate (without alternates) $57.00 per foot (with alternates except alley) $63.00 per foot Special Assessments $338,327 - 0 - - 0 - 0 $ 4,836 $ 34,528 $ 1,300 RLK ASSOCIATES, LTD. PLANNING AND ENGINEERING FEASIBILITY REPORT PROJECT BACKGROUND INFORMATION ON THE KNOLLWOOD STREET RECONSTRUCTION PROJECT PROJECT LOCATION The project involves the reconstruction of streets and utilities for the Knollwood neighborhood as identified on Figure 1. The neighborhood is located in the northeast corner of Hopkins, north of Highway 7 and east of Oak Ridge Road abutting the Cities of St. Louis Park on the east and Minnetonka on the north. STUDY OBJECTIVE RLK Associates' principal objective is to work with the residents of the neighborhood and the City officials to accomplish a successful neighborhood improvement project. We look at this project as a public - private partnership to improve one sector of the City for all the taxpayers of the City. A low maintenance area achieved through an improvement project that beautifies and enhances a particular neighborhood is a benefit to all the members of the City. MISSION STATEMENT A "guiding light" is the mission statement of a resource team as they approach a unique neighborhood improvement challenge. For the Knollwood Street Reconstruction Project, the following statement has guided the staff of RLK Associates. " Enhancement of a residential neighborhood to the extent that the residents are comfortable and satisfied to be residing in their local environment. At the same time, providing an infrastructure and physical improvement plan that relates to the City's general physical plant allowing public services to be performed effectively, efficiently and at a cost that is equitable with other neighborhoods throughout the City." The project involves more than simply the replacement of deteriorated infrastructure with new infrastructure. It will involve close communication with residents, City staff and a unique ability of the design team to produce a quality product tailored to the Knollwood neighborhood. RLK Associates is committed to tailor a streetscape project for this neighborhood within the expectations of the City of Hopkins as a whole. This feasibility study will identify alternatives to the roadway width and edge control for the Knollwood project. It is our intent to bring new ideas and a sensitivity to this street reconstruction project so that at the conclusion of this project, the City and residents of Knollwood will be satisfied with the function, cost and appearance of the street improvement. FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 1 `ASSOCIATES LTD/ 922 Mainstreet Hopkins, Mn. 55343 (612) 933 -0972 fax (612) 933 -1153 LOCATION MAP RLK ASSOCIATES, LTD. HISTORY A considerable amount of history on the Knollwood Street Reconstruction Project needs to be understood if we are to gain the trust and respect of the neighborhood. Much of the TKDA material from the previous study dated January, 1990, was reviewed in preparation of this report. Upon review of the material in the petition from the residents, a fair amount of the existing TKDA material can be utilized in the renewed Minnesota Statutes Chapter 429 process. Ultimately, the roadway width, edge condition, landscape features and plant material will impact the final design. These items will be reviewed, compared to the contents of the petition, and factored into the recommendations of the feasibility report. The petition submitted by the Knollwood Neighborhood, at the August 6, 1991 City Council meeting is the second request by this neighborhood for a street reconstruction project. The first petition submitted in December 1989 resulted in the City Council authorizing TKDA to prepare a feasibility study. TKDA prepared the analysis on the utility and roadway system and prepared appropriate cost estimates. The project range for the reconstruction cost this project in 1990 dollars was estimated at $800,000. During the early months of 1990 public hearings were held on the street reconstruction; however, a number of issues regarding roadway width and use of concrete curb and gutter were not acceptable to the neighborhood. The City's roadway policy was in conflict with what the neighborhood desired as a final product, therefore, the first petition for roadway construction did not proceed beyond the feasibility report. The new petition submitted at the August 6, 1991 City Council meeting by the Knollwood neighborhood specifically requests the following: Continuous asphalt raised edge curb and gutter in lieu of concrete curb and gutter o Greater than 55% of all property owners' signatures were achieved (26 total). This was in accordance with City Policy #7 -D. o Design modifications to address actual drainage and maintenance concerns were requested. o Unobtrusive and flat - laying gutters (non-raised) to collect storm water for drainage into the underground storm sewer system were requested. o Asphalt paving with center draining was requested for the alley serving the three properties south of Cottage Downs. FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 3 RLK ASSOCIATES, LTD. Street Width - 20 feet overall (back to back of raised asphalt edge) Streets currently 20 feet or greater in width shall be reconstructed to those same respective widths Streets currently less than 20 feet in width shall be reconstructed to 20 feet in width unless existing and /or adverse conditions are present and the City council approves a width narrower than 20 feet. The residents understand that streets less than 26 feet in width may be subject to parking restrictions on an "as needed" basis at the time of construction or in the future, if needed. City staff will review streets for emergency vehicle needs and will report to City Council with recommendations. o City staff will work with neighborhood to identify areas and appropriate justifications where street width may be increased to provide unrestricted parking (26 feet maximum width). The City roadway policy allows for the above petitioned items. However, at issue is the City's desire to install a project which will be properly engineered and provide a 30+ year life expectancy. Without proper edge control, a bituminous roadway mat in a neighborhood such as Knollwood will not endure for 30+ years without significant maintenance expenditures. At issue with the neighborhood is maintaining a "rural" character of the roadway as it presently exists, the absence of the white ribbon of concrete curb and gutter, irregularity of the roadway, and mature trees within the street right of way. The petition submitted by the Knollwood neighborhood identifies the critical issues which are to be incorporated into the street and utility reconstruction. The "rural" passive character in Knollwood is noticeable and offers its residents a quality neighborhood environment. A street reconstruction project should enhance the infrastructure without negating the visual appearance of the neighborhood. At the same time, the infrastructure and physical conditions should relate to the City's general physical plant, allowing public services to be performed effectively, efficiently and at a cost that is equitable with other neighborhoods throughout the City. RLK Associates feels this should be the overall goal guiding this improvement project. PLANNING AND ENGINEERING FOR THE KNOLLWOOD PROJECT RIGHT OF WAY /EASEMENTS The pond at Wilshire and Valley Way is privately owned while the pond at Bridle Lane and Valley way is owned by the Knollwood neighborhood association. Neither pond is proposed to be owned by the city. Drainage and maintenance easements should be obtained for the two ponds proposed to be utilized for storm water ponding. FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 4 RLK ASSOCIATES, LTD. Additionally, there are other easements necessary for the utilities that exist within the Knollwood reconstruction area. Several segments of utility pipe is located on private property. In one case, the sanitary sewer appears to be aligned under the footing for a building structure. These utilities have served the neighborhood in these locations since the origin of the subdivision. During the detailed design process with the property owners involved in the process, these easement requirements will be determined to a more specific degree. The existing street right of way is generally 40 feet in width. There are several locations where the street was not constructed on the right of way. Temporary or permanent construction easements may be required. An option to discuss is whether the street should be moved to the center of the existing right of way during this construction project. If this is done, a minimal number of easements and /or property acquisition will be necessary. However, by moving the street into the center of the right of way, approximately 4 trees will have to be removed. If the street is generally left in its present alignment, these same trees can be saved. Figure 2 shows the location of the trees that will have to be removed if the street is centered on the right of way; easements will be necessary to eliminate the tree loss. Given the large size of the Knollwood lots, it is recommended that the street be left in its general location and new easements and /or property acquisition be commenced to accommodate this alignment. Within this report, our estimates of impact have been made under the assumption this recommendation will be acceptable to the Knollwood property owners. In order to control the construction costs on this project, and keep the assessments within a reasonable range, it is not anticipated any funds will be available to purchase property or easement rights. If this is necessary, the cost of acquisition is recommended to be applied to the assessable part of the reconstruction project costs. The appropriate assessment proportion contained in Policy #7 -D would then be applied. During the course of the Knollwood Reconstruction project, it is recommended that all cases of the need for easements /property acquisition be considered and appropriate action be taken. UTILITIES Story Sewer System Serving Area The existing internal storm sewer system for the Knollwood area is minimal. Figure 3 demonstrates the storm sewer utility. The two pond areas collect greater than 80% of storm runoff from the neighborhood, and eventually the discharge is directed along Bridle Lane to the 15" storm sewer line, lying directly east of Edgemoor Avenue. This 15" pipe outlets just south of the Hopkins - St. Louis Park city line and discharges into a ditch running easterly then southeast into a 15" RCP which runs south under Highway 7 and connects to a 30" RCP that runs east towards Highway 169 and then to Minnehaha Creek. FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 5 0 cc STATE CITY OF MINNETONKA 922 Mainstreet Hopkins. Mn. 55343 (612) 933 -0972 fax: (612) 933 -1153 LEGEND KNOLLWOOD STREET RECONSTRUCTION TREE REMOVAL AND PARKING AREAS SUGGESTED PARKING BAY AREA TREE TO BE REMOVED TREE TO BE REMOVED F EASEMENTS ARE NOT OBTAINED FIGURE_ 2 O cc Q cc `ASSOCIATES LTD/ CITY OF MINNETONKA (612) 933-0972 fax: (612) 933-1153 922 Mainstreet Hopkins, Mn. 55343 KNOLLWOOD STREET RECONSTRUCTION EXISTING STORM SEWER FIGURE 3 RLK ASSOCIATES, LTD. An area in the northwest corner of the development west of the alley at 410 Cottage Downs drains into an existing 12" pipe running west to Oakridge Road. The existing pipe in Oakridge Road flows north to the Minnetonka city system. The northeast drainage system of the neighborhood consists of a 12" pipe running from the east side of the lot at 215 Cottage Downs, west to Valley Way, then south along Valley Way to the Bridle Lane pond. Approximately 60% of the existing storm sewer system is proposed to be utilized with the new street system. The northeast drainage system, described above within Cottage Drive, will be re- utilized. A portion of the Bridle Lane- Edgemoor Drive system will be used, but the majority of this system will be reconstructed. Recommendation: The public and private drainage areas will be incorporated into a new storm sewer system, utilizing new catch basins, piping and storage capacity in the two ponds. Anew outlet to control the high water level of the Bridle Lane pond will stabilize the entire storm drainage system. Discharge of the storm water into the Highway 169 /Minnehaha watershed will not exceed pre - development levels. Water Quality: Water clarity in the Wilshire Walk pond appeared good during a late October 1991 observation, but the clarity was very turbid in the Bridle Lane pond . It may be advisable to provide a small sedimentation area by means of a riprap dike and overflow weir in the southwest corner of the Bridle Lane pond around the inlet from the Wilshire pond. Cost for a sedimentation basin similar to the concept plan shown on Figure 4 is approximately $3,000. An observer of the pond would not notice the sedimentation basin since it would be under the water surface. However, the construction of this basin would considerably aid the City personnel in maintaining the water quality, reducing and removing sediments in the pond. Future dredging activities would be limited to the basin area. The cost of this component of the storm sewer system would be paid for through the City's Storm Sewer Fund. A further analysis of the pond's depth and storage capacity will be investigated in later design stages. If it is found the ponds need to be dredged for storm water management, the cost will be paid for from the appropriate fund. If, however, the pond is to be dredged for aesthetic reasons, the cost would be paid for by the homeowners association. Water quality data in the 1990 RCM Storm Water plan will be evaluated and the ponds analyzed according to National Urban Runoff Program (NURP) methods as developed by the United States Environmental Protection Agency. The existing pond depths need to be determined and the possible need for dredging to obtain a quality of outflow water from the Bridle Lane pond. Dredging of the ponds could be accomplished at the time of the street reconstruction. The last time the ponds were cleaned out was approximately 20 years ago. The ponds will be utilized as an integral part of the Knollwood storm sewer system. It is proposed that all storm sewer improvements will utilize sedimentation controls at the outfall structures as shown on Figure 4. FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 8 OUTLET PIPE RLK \ASSOCIATES LTD. y 922 Mainstreet Hopkins, Mn. 55343 (612) 933 -0972 fax: (612) 933 -1153 10' -15' MAX. CLASS IV RIPRAP NORMAL WATER LEVE ';•� 2 .�,.• J: •:., . � 2 _ • - 0 Air) cP o �� ° • t Q o. :� o Qfl o� • 0 • • SEDIMENTATION BASIN DETAIL FIGURE 4 No. A 8 • G H i Type . lbs. R-4370-1 a?, � .V.t.!A:1: . Y•` !LV.. }• : S- :• :'i ::+:: 1. A: •'�"•'• " " ?� _7 l' a r y � ' � V :V'•T W }'`i: ' 3iTli. • .•: ? t :t , Yak 1!1 \!J' V ?.6�•.�r .V ti.'`.(S ?i.•f. V: ii.7RV. :'' ?i'? C .!.11]N. •• •t ?•:�!.!,X,! : ,�7,•�,!i: �•J :? .::,,_�: >_:!: ' . 7 �ti: . � : ��? ' ? \ ' S � l :!:!.!.1 ' : - { • ? . fir •: {•: 1::,::i 7 i' I,i • • �. T17 S:•: '•::::•:Y•,.'T,.'TF.�.•�:•:. y([ ' S'v ,l l M I11171::1!I I Il t: C:: �.::: :•. .!.� � :: t }.1.�! y :, x1,111 11111:111 1111 i l : t tl:::l: f's t :::•::• :: �!� • ?�'.•. • JJ: !; : ? i ! : •• ': !SI: :,:•':: :y.:v :: C . .�' 11 : ::YY •v: 7 6 „ %,,,: ;,;,, : ,,, • L4370-9 22 Itz 'f M' !. ••,., • : ' t., ?.? ok':a, ^.• :.T.:. ^ : . J A?'e S ... .1 : J 5� :. X . ? ?!'?• • •. :J t .Lti •:.V :: :7K } :•• • v. ?..R.ti`:ii* ' :: :•: • } • • L4•••: ;, •.. 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(see drawing below). 1 2 21 R- 3501 -TR inlet for Roll Type Curb 23i —5a 9- R-4370 Series Heavy Duty Round Drainage Grates most crates listed can be furnished with iigntweicht cost iron ar.cie frames wren specified. Frame is of 1/2. metal as shown on Dace 2 For severe - impacted locoing conditions, inouire about *nese grates in Ductile Iron. 31 25 29 0 Not recommenoeo for bicycle traffic. For safety stanaaras see pages 88 ro93. Rated as Medium Duty Heavy Duty. • Type C J:::• �1� : :• :? Ji: ? �! : ! 1 :. : : � : ? :•i: ?•Ill j? .......... :..r. V::.J•i• Illustrating R- 3250 -CL IMPORTANT_Rerr;,e coo screws from taro box when concrete curd ^cs set Illustrating R- 3501 -TR (flow rient). If flow left is required, order as R- 3501 -TL. en 7 C -J ASSOCIATES LTD• J 922 Mainstreet Hopkins. Mn. 55343 (612) 933 -0972 fax: (612) 933 -1153 TYPICAL CASTINGS DETAIL FIGURE 5 RLK ASSOCIATES, LTD. Catch Basin Design: Neighborhood residents expressed a desire to have catch basins that were nearly invisible to the people passing through on the streets of Knollwood, either by motor vehicle or as a pedestrian. The design of the catch basin is a function of the edge control that is used on the project. Figure 5 demonstrates the style of catch basins that would be used dependent upon the type of edge control. Later in the report, in the edge control section, the types of catch basins that have been considered will be briefly described. The quantity of runoff that can be handled by the different types of catch basins is not a significant decision factor. Private Property Drainage Areas: At the October 28th neighborhood meeting, the property owners were requested to review their experience with drainage problems on their private yards and communicate the problems to RLK Associates. This information with the survey data from the questionnaires is included on a chart that is contained in the appendix. Additionally, several problems were passed onto RLK from the past consultant thru their review of the project. This data is also included on the chart in the appendix. These problem areas will be identified and studied further during the detailed design phase of the project. Open Drainage Ditch Between 810 and 820 Edgemoor Drive a culvert is proposed to collect water at this low area. A drainage ditch is proposed to run parallel with Edgemoor Drive toward the intersection of Bridle Lane where it will be collected into the storm sewer system. Location of the ditch will be aligned to avoid disruption to the mature trees. All ditch areas will be reseeded and re- established in a natural grass character. Perforated Underdrains /Bituminous Curb Alternate: If the bituminous curb alternate is chosen, it is recommended that perforated underdrains at least 100 feet each way from the street low points be constructed. This would provide maximum subsoil drainage along the pavement edge, and help to prevent early pavement edge deterioration and breakup. Figure 6 demonstrates the characteristics of the underdrains that are connected to the storm sewer catch basins. It should be noted that Braun Engineering Company, who did the soil borings for the neighborhood project in 1989, made the original recommendation for the underdrains in a report dated March 2, 1990. It was based upon soil types, groundwater conditions, and pavement drainage characteristics. The bituminous pavement edge is the most vulnerable component of the street product as evaluated over a long period of time. Addition of the underdrains helps to assure a longer life for this type of edge control. The additional cost for underdrains is $46,800. Recommendation: The public and private drainage areas will be incorporated into the new storm sewer system, utilizing new catch basins, piping and storage capacity in the two ponds. A new storm sewer is needed to connect the two ponds and connection to the storm sewer east of Edgemoor Avenue. A new outlet to control the high water level of the Bridle Lane pond will stabilize the entire storm drainage system. Discharge of the storm water into the Highway 169 /Minnehaha Creek Watershed basin will not exceed current drainage outflow levels. FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 11 6" CLASS 5 12" SELECT GRANULAR BACKFILL NOTES: 1. SELECT GRANULAR BACKFILL MODIFIED TO 7% PASSING NO. 200 2. SELECT GRANULAR & PERFORATED UNDERDRAINS TO BE USED AT LEAST 100 FEET EACH WAY FROM ROADWAY LOW POINTS ASSOCIATES LTD 922 Mainstreet Hopkins, Mn. 55343 (612) 933 -0972 fax: (612) 933 -1153 10' TO CENTERLINE 1-1/2" 41 BIT. WEAR 2" 31 BIT. BASE 6" MIN. 12" 12" MIN. r ALTERNATE A BITUMINOUS CURB III 4" BIT. CURB SHOE FORMED FINE FILTER AGG. 4" TP PERF. PIPE W/ GEOTEXTILE WRAP 2" MIN. FILTER AT ALL POINTS BELOW PIPE FIGURE 6 RLK ASSOCIATES, LTD. Recommendation (continued) It is recommended that sedimentation basins be incorporated into the stormwater system at each outfall point in the ponds, two are recommended. Figure 7 graphically demonstrates the proposed reconstruction plan. Positive drainage improvement throughout the Knollwood neighborhood area will result with the implementation of this drainage plan. Water quality in the neighborhood ponds will be enhanced subsequent to the construction project. Limited dredging of both ponds will be bid as an alternate in the construction package. During the detailed design process, further interaction with the neighborhood will lead to clarification of the design details relating to these water quality issues. Ultimately, reconstruction of any component of the storm sewer system will be in accordance with the state guidelines of water quality protection. At the request of the neighborhood representatives, no aerators or fountains will be bid or included at this time. The storm sewer reconstruction proposal is estimated at $119,717, including overhead. This includes the sedimentation basins, dredging estimates, storm sewer manholes, and storm sewer pipes. The perforated underdrains, -shown in the storm sewer system on Figure 8, have not been added to this estimate. They are only recommended if the bituminous curb alternate is chosen. This will be discussed more thoroughly later in the report. Sanitary Sewer Reconstruction The existing sanitary sewer main system consists primarily of 8" VCP, 3 foot sections installed 35 -40 years ago. Throughout the years, various sections have been replaced by the Public Works Department. Figure 9 displays graphically the existing layout of the sewer system. Much of the system is in fair to poor condition with cracked pipe, offset joints, roots in joints, mineral deposits, sags in pipe, etc. The sewer system was televised in 1989 and due to the pipe's condition TV cameras could not be pulled through the pipe in some locations. A chart was prepared based upon past television logs and cleaning data. It is included within the appendix to this report. It would be advisable to replace any pipe which has the potential to cause serious periodic maintenance problems or require spot replacement involving street excavation within the next 15 to 20 years. The last televising of the sanitary sewer system was done in 1987. The City decided to complete another TV evaluation of the sewer system in the fall of 1991. Replacement recommendations will be reviewed when the City completes re- televising of the system which is currently ongoing. The sewer televising and evaluation report (a new chart will be prepared) is expected to be complete by the end of November, 1991. A recommendation on the refurbishment of the sanitary sewer system will be available prior to the public hearing on the Knollwood Reconstruction project. FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 13 cc STATE CITY CF MINNETONKA • • KNOLLWOOD STREET RECONSTRUCTION EXISTPIG STORM SEWER PROPOSED STORM SEWER RIX ASSOCIATES LTD 922 Mainstreet Hopkins, Mn. 55343 (612) 933 -0972 fax: (612) 933 -1153 PROPOSED STORM SEWER FIGURE 7 STATE HWY. NO. 7 KNOLLWOOD STREET RECONSTRUCTION }>-- -- EOSTNG STORM SEWER PROPOSED STORM SEWER 4 PERFORATED PVC UNDERDRAINS SELECT GRANULAR BORROW RIX �ASSOCSATES LTD./ 922 Mainstreet Hopkins, Mn. 55343 (612) 933-0972 fax: (612) 933 -1153 PROPOSED STORM SEWER WITH UNDERDRAINS FIGURE 8 STATE ASSOCIATES LTD J 922 Mainstreet Hopkins. Mn. 55343 (612) 933 -0972 fax: (612) 933 -1153 LEGEND —t KNOLLWOOD STREET RECONSTRUCTION t EXISTING WATER MAIN EXISTING SANITARY SEWER AND WATER MAIN EXISTING SANITARY SEWER FIGURE 9 RLK ASSOCIATES, LTD. The existing pipe diameter of 8" is sufficient to provide adequate capacity for existing and future flows. There are no plans pending to increase the number of homes within the neighborhood, or in upstream areas flowing through the area such as the Oak Ridge Country Club golf course. Scheduling and staging of the sanitary sewer work is critical with respect to other elements of the project, especially the water main. Construction will be done in stages as set forth in the plans and specifications to minimize service disruption and maintain street access to residences. Private service renovation: During the neighborhood meetings, residents expressed concern over several unique sewer service problems. These problems and others that have been ascertained from different sources will be reviewed during the detailed design phase to assure the private service problems are corrected during the reconstruction project. Funds that are expended for work on the private services are assessable directly to the benefiting properties. The sanitary sewer estimates account for 20 or about 1/2 of the service wyes to be replaced and reconnected to the existing service pipes. At least three residences have a history of sewer back -up problems. At 122 Wilshire Walk, where there is no basement, it has been reported that the shower stall back- ups repeatedly. At 413 Cottage Downs back -ups have been reported. Later in this section, discussion will focus on 602 Edgemoor Drive. The service all the way up to the house may have to be replaced as part of the project. Additional problems may be uncovered as a result of the communications with the residents. Each of the problem areas will be examined closely. Wilshire Walk Sanitary Sewer: Figure 9 shows the sanitary sewer layout on Wilshire Walk from Oakridge Road to Edgemoor Drive. An item of particular concern is the eight inch sewer from the east end of the Wilshire Walk cul -de- sac to Edgemoor Drive. There are four significant problems with this 484 foot length of pipe. 1) The pipe is located under an attached garage at 602 Edgemoor Drive. 2) There are no records of an easement for this pipe. Since it is undesirable to have an active sewer under a building, it may be difficult to gain an easement for the operation of the sewer in this location. 3) The pipe length of 484 feet between manholes exceeds that which is considered good practice for sewer maintenance cleaning. 4) This segment of pipe appears to be in poor condition based upon television inspections. Major repair or replacement seems to be evident. The property owner has reported that his service pipe backs up occasionally during discharge of laundry washwater. This could be caused by the poor condition of the main or the service connection. FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 17 BRIDLE LANE ALTERNATIVE SANITARY SEWER ROUTE LOCATIONS ARE PROPOSED TO ELIMINATE THE SEWER LINE RUNNING UNDERNEATH THE GARAGE AT 602 EDGEMOOR ASSOCIATES LTD., 922 Mainstreet Hopkins. Mn. 55343 (612) 933 fax: (612) 933 -1153 SANITARY SEWER ALTERNATE ROUTES FIGURE 10 RLK ASSOCIATES, LTD. Solutions involve cleaning the existing pipe, lining the sewer pipe with plastic, or relocating the sewer pipe outside of the existing location. If this is done, the existing pipe would be abandoned in place. The service pipe for 602 Edgemoor Drive will have to be examined carefully to see what the recommendations are for the private connection to the new pipe. If relocation is adopted, a new route must be reviewed. During the feasibility study process, three possible relocation routes were examined. These three routes are shown on Figure 10. For discussion purposes, the routes are lettered A, B, and C. Route A and B are undesirable because they would cause a considerable impact to the adjacent property in the way of tree and shrubbery loss. Route A, running to the east to Edgemoor Drive, passes through a wooded knoll requiring trench depths up to 14 feet and removal of several trees of trunk diameters greater than 4 inches. Route B, running south toward Highway 7 than east to the sewer line in Edgemoor Drive, passes closely between the residences at 122 and 208 Wilshire with less than 40 feet of clearance between the houses. This route also requires the removal of a number of mature trees and shrubbery. Additionally, this route would require an estimated 200 feet more piping than the northerly route. Route C has its problems but appears to be the most desirable of the three alternates. By locating the sewer pipe approximately 7 feet east of the west lot line at 710 Edgemoor Drive, one 18" Oak tree and some shrubbery would be lost. The Oak tree is immediately east of a power pole and has been severely trimmed, presumably by the power company for power line clearance. The cost estimate for route C is $8,700, including the replacement of the landscaping with new material. No costs are allocated for the easement rights that would be requested by the City prior to commencing construction on this alignment. During the detailed design process, these alternates would be thoroughly discussed with the neighborhood residents that are effected. If a plastic liner were placed in the sanitary sewer line between the Wilshire Walk cul -de -sac and Edgemoor Drive, the cost estimate is $28,000. This estimate of cost includes leaving the sewer line in place, under the structure, and placing the plastic liner. Recommendation: Figure 11 describes the recommended renovation program for sanitary sewer. Please remember that this recommendation will be augmented by the Fall, 1991 sanitary sewer cleaning and televising program. It is recommended to 1) replace the 8" sanitary sewer main and manholes which RLK anticipates needing repair within 15 -20 years; 2) coordinate sanitary repair with water main /storm sewer trenching and replacement; 3) construct the alternate shown on Figure 10, route C to eliminate the sewer pipe under home at 602 Edgemoor Drive. Route C alternative pipe location will necessitate property owner agreement and utility easements for the underground pipe location. Current estimate is that 50% of the sanitary sewer main line will be reconstructed at a cost of $90,900. In the appendix is a detailed cost estimate on this utility reconstruction proposal. FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 19 CITY OF MINNETONKA STATE --i— -1 EXISTING WATER MAIN EXISTING SANITARY SEWER REPLACE EXIST. SANITARY SEWER LIE SAN. w (ALT. A) \U\\ \\ \ \ \ \\ KNOLLWOOD STREET RECONSTRUCTION ASSOCIATES LTD.. 922 Mainstreet Hopkins, Mn. 55343 (612) 933-0972 fax: (612) 933 -1153 PROPOSED SANITARY SEWER FIGURE 11 RLK ASSOCIATES, LTD. Watermain System Reconstruction The existing water main, shown on Figure 9, is cast iron with lead joints. The reconstructed portions of the sanitary sewer system and construction of new storm sewer in some areas will damage the existing water main joints through vibration during trenching and compaction operations. In addition, the existing watermain will interfere with new sanitary or storm pipe in some areas, making it necessary to relocate and rebuild some water main. It is proposed to rebuild the existing water main wherever it is adjacent to sanitary sewer that is proposed for reconstruction or new storm sewer. Where - ever new watermain is placed, ductile iron pipe (DIP) would be used in replacement of the Cast Iron Pipe. It may be necessary to do the water -main work first to make room for relocation of sanitary sewer and new storm sewer. It is proposed to close a loop on Valley Way by constructing a new 6" DIP watermain from Bridle Lane to Park Terrace. This improvement will eliminate a dead -end, potentially stagnant water problem. The. City staff has indicated there is good water pressure in the Knollwood neighborhood. During the detailed design procedure, the water and fire departments will be consulted about the proposed relocation and /or placement of new fire hydrants. Currently the water main under Wilshire Walk east of Valley Way is a dead end. If Route C for the sanitary sewer is constructed the water main will be looped between Wilshire Walk and Bridle Lane. The length for this additional water main would be 400+ L.F. at a total cost of approximately $7,000. This $7,000 has been included into the water main cost estimate. Private Services Replacement: The residents were briefed at the October 28th public meeting about the possibility of lead service water pipes. During the detailed design portion of the project, further information on the condition, age, size, type of materials, maintenance problems and location of the private service line will be investigated. Each resident is responsible for their service line. There is no better time for review of this infrastructure component than during the neighborhood utility and street reconstruction project. During the public meeting on October 28th, residents commented on the existing sprinkler systems in the boulevard areas adjacent to the roadways. Prior to construction the City will send out forms asking individual property owners to identify whether underground sprinklers are present. According to City policy, homeowners with underground sprinklers within the public right of way will be responsible for marking the lines and replacing the system subsequent to construction. The Construction Manager will oversee the removal of marked systems to see that minimal damage is done to the private sprinkler systems. A second option would be to allow the Construction Manager to coordinate the replacement of the irrigation systems with the general contractor, and at the end of the project assess back the irrigation costs to the respective property owner. By allowing RLK to coordinate the irrigation repairs, the property owner will be assured of a complete project at the conclusion of the restoration phase. FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 21 RLK ASSOCIATES, LTD. Recommendation: Figure 12 demonstrates the recommended replacement of 3,800 lineal feet of 6" CIP watermain with DIP. The cost estimate of $99,060 includes items for 20 service connections, ten 6" gate valves and 4 new hydrants. Allow the Construction Manager to coordinate the reinstallation of the underground sprinkler and assess the work effort back to the individual property owners. At the completion of the current sanitary sewer televising program, the work proposal for the watermain system will be re- evaluated. Private Utilities The private utility companies consisting of the gas company -- Minnegasco, the electrical company -- Northern States Power Company, the telephone company US West, the cable television company Southwest Cable and any other private service company working in the Knollwood neighborhood periodically or regularly will be notified of the pending project upon completion of the public hearing process. All utility company facilities will have to be reconstructed if they are in the way of any of the City reconstruction efforts. The Minnegasco facilities would be replaced per City memorandum dated February 1, 1990. These locations need to be upgraded with the exact location of the proposed roadway and utilities during the detailed design process. US West has buried cable on the west end of Wilshire Way and along the east edge of the roadway of Edgemoor Drive. These facilities will also be reviewed more thoroughly as the design proceeds forward. Apparently the facilities owned by NSP, U.S. West and Cable T.V. exist on overhead NSP poles serving the individual residences. These three overhead systems are proposed to be maintained and continued in their present state. During the detailed design process, the consulting engineer will review the economic advantage of placing open conduit for the future undergrounding of the aerial facilities. This decision will be made after consultation with the utility companies and the neighborhood property owners concerning cost assessment formulas. FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 22 ASSOCIATES LTD. STATE CITY OF MINNETONKA 922 Mainstreet Hopkins. Mn. 55343 (612) 933-0972 fax: (612) 933 -1153 LEGEND PROPOSED WATER MAIN KNOLLWOOD STREET RECONSTRUCTION - EXISTING SANITARY SEWER REPLACE EXIST. WATER MAN NEW WATER MAN FIGURE 12 RLK ASSOCIATES, LTD. Alignment STREET' ANALYSIS It is recommended to center the street on centerline of right of way where possible. Where necessary to preserve 6" diameter or larger trees or fit between existing walls and /or narrow right of way such as Edgemoor Avenue, the street should be aligned accordingly. Figure 2, discussed earlier in the easement section of this report, locates some of the areas where trees impact the alignment off the roadway. As mentioned earlier, the existing street right of way is generally 40 feet in width. There are several locations where the street was not constructed on the right of way. By moving the street into the center of the right of way, approximately 4 trees will have to be removed and up to 15 additional trees will be severely impacted. If the street is generally left in its present alignment, some of these same trees can be saved and the potential for tree loss greatly reduced. Figure 2 shows the location of the trees that will have to be removed if the street is centered on the right of way; easements will be necessary to eliminate the tree loss. This is an issue that demands that the sensitivities of the property owners be highlighted. Future meetings will focus on the wishes of the effected property owners. A consensus agreement on the roadway alignment may be difficult to achieve. Where agreement is not possible, the roadway will be realigned in the center of the existing right of way. Edge Control In order to protect the long term investment of this street reconstruction project, the use of edge control i.e., concrete curb and gutter is recommended. The durability and ability to channel storm water, while basically doubling the life expectancy of the road cannot be ignored. The visual intrusion of a white concrete edge is RLK's understanding of the primary reason why concrete curb and gutter is not desired on this project. New developments in construction of concrete products allows for the opportunity of a colored concrete curb line, one which would closely match the bituminous pavement. There are many other color alternates that are available based upon the desire of the neighborhood. For example, an earthtone brown concrete could be used instead of a darker concrete. At future public meetings, this subject will be explored more intensely with the neighborhood. RLK proposes utilizing a colored concrete curb and gutter for edge control which will achieve the objectives of the City for long term life of the roadway, and of the neighborhood for maintaining a consistent visual character between the roadway and landscaped yards. Therefore, from a visual perspective, the petition request could essentially be met while alleviating the City's maintenance concerns about the lack of edge control. The colored concrete edge control is a more expensive option than standard curb and gutter; however, the initial investment of an additional $26,500 for colored concrete should be considered in order to implement an edge control option. FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 24 RLK ASSOCIATES, LTD. The colored concrete is a departure from the City policy #7 -D standard curb and gutter. The cost of the colored concrete curb over and above the standard concrete curb will have to be paid for by the entire neighborhood organization. The additional cost for the colored concrete curb would be less than the bituminous curb option and still provide the visual esthetics desired by the neighborhood. From a visual perspective the color can be appealing depending upon the audience' viewpoint. Relative to the engineering application, there is not a loss of strength or function through the use of the colored concrete. The extra cost is a function of mixing control features to insure the concrete has the same properties as regular concrete with a consistency and uniformity of color throughout the mix. Different admixtures are used in the colored concrete that effect the air entrainment mixture. Therefore, unique mixing features have to be incorporated in the color concrete mix design to insure the specifications of strength and durability are met. The Minnesota Department of Transportation (MnDOT) has used colored concrete recently on several of its projects. They have developed a specification that has been transmitted to the consulting engineer. In consultation with MnDOT officials, there is no doubt that the use of the product will be successful in the production of colored curb and gutter for the Knollwood neighborhood. The chart on the following page compares the proposed alternates that are consistent with City policy #7 -D on a roadway life cycle cost basis. The issues are life expectancy, guarantee and maintenance burden of a street reconstruction project without edge control and economics. The entire reconstruction project is being paid for by an assessment at 70% and city participation at 30 %. The City needs to be assured that the long term maintenance of a system such as the petition proposes does not add an additional maintenance strain on the City versus a standard street reconstruction project. Data contained in the chart is consistent with a study that was done by the City of Minnetonka and published on January 24, 1990 in a report entitled "Preliminary Life Cycle Cost Analysis -- Urban Street Standard Versus Current Minnetonka Street Standard ". This report is available in the consulting engineer's office for the reader's review upon request. The conclusions of the study indicate that concrete curb and gutter with properly designed storm sewer have a dramatic effect on savings to the taxpayer in street maintenance over the life of the street facility. Approximately $193,000 per mile of street over a 35 year period can be saved in maintenance costs if edge control is used versus no edge control. The chart that is demonstrated below is based upon applying these savings in the Knollwood neighborhood to the City of Hopkins. FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 25 RLK ASSOCIATES, LTD. The Equivalent Uniform Annual Cost (EUAC) is a relative figure which depicts the average annual cost of constructing and maintaining an element of public infrastructure over its' useful life. It is typically used to measure the cost - effectiveness of one alternate versus that of another. The EUAC calculation factors all the capital costs and maintenance costs elements together to produce a dollar amount on a per foot basis that is reflective of the average annual cost to construct and maintain the roadway over its useful life as a City street. Overlay [All costs Capital Annual & Seal Equivalent on a lineal Life Cost per Charges Coating Uniform Annual foot basis] Expectancy Lin.Foot Mtce. Charges Costs (EUAC) 26 ft. wide Bituminous Roadway w/o Edge Control 26 ft.wide Bituminous Roadway with Concrete Curb Edge Control 25 years 35 years $90 $0.19 $0.45 $5.51 $125 $0.12 $0.29 $4.46 The Knollwood neighborhood has 6640 feet of roadway length. The savings per year to the City is approximately $7,000 with the street constructed with edge control versus the street with no edge control. This equates to an astounding $175,000 savings over the estimated 25 year life of the bituminous street without edge control. Analysis of Streets for Reconstruction: Currently the streets within the study area vary in width from less than 20 feet to over 26 feet in width without any edge control. The proposed streets are recommended to incorporate an edge control situation or a series of under drains in order to improve the long term investment of the residents and city. The petition submitted by the residents spoke to a bituminous curb edge and a street width of 20 - 26 feet in width. Fire and police vehicles require an open drive area of at least 20 feet in width. Any street reconstructed with a driving surface of less than 26 feet may have restrictions applied to on- street parking in accordance with City Policy #7 -D, Section 8.04. In the case of restrictions, parking of residents and guest vehicles will have to be provided for on the private property of the individual lots. An option to consider is "parking areas " built into the roadway at selected locations that can be used for overall resident on- street parking. Figure 2 identifies 5 suggested areas for an parking bay. FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 26 RLK ASSOCIATES, LTD. Concrete Driveway Aprons Concrete driveway aprons are typically included in Hopkins street projects having concrete curb and gutter. For this project, residents have expressed objections to concrete aprons for aesthetic reasons, similar to objections to concrete curb and gutter (see paragraph 6 on the following page under Street Width discussion). Therefore, concrete aprons have not been included in the project or the detailed estimates in this report. If the recommendation to build mountable concrete curb and gutter is chosen, the concrete gutter can be extended across driveway entrances. This would provide positive drainage, as well as permitting vehicle traffic to easily enter and exit. For maximum vehicle ride quality, the 4 inch curb height can be lowered across the driveway openings. If concrete aprons were included, see Figure 24, the estimated quantity is 850 square yards, and the total estimated cost is $19,890. Street Widths Six alternatives were reviewed regarding street width and edge control. Figures are referred to illustrating typical details of the design option. Effective driving surface width of 20 feet: Alternate A - 20 foot face of bituminous curb to face of bituminous curb (see Figure 6) Alternate B - 20 foot face of B6 -18 concrete curb and gutter to face of concrete curb and gutter (see Figures 13 and 14) Alternate C - Mountable concrete curb and gutter, 18 feet edge to edge of gutter, equivalent to 20 feet of driving surface (see Figures 15 and 16) Alternate D - Mountable colored concrete curb and gutter, (edge control) 18 feet edge to edge of gutter (see Figures 15 and 16) Effective driving surface width of 26 feet: Alternate E - 26 feet face of B6 -18 concrete curb and gutter to face of concrete curb and gutter (see Figure 17) Variable surface width from 20 feet to 28 feet: Alternate F -18 feet edge to edge of gutter (equivalent to 20 feet of driving surface) to 26 feet edge to edge of gutter (equivalent to 28 feet of driving and parking surface), Mountable curb and gutter (see Figures 2, 16 and 18) Refer to appendix for cost estimates for each of the above alternates FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 27 O N W CC W LLI 0 P- - V o3 Q W CC CO MI CC W (M w U cc 0 N 3z = Q > i 1-a o Q Wiz§ Z mJ 4a Q1 3 8 '4'5 Luz; ▪ mI—. tl3 m n i g 0 J U tC tM Cc LL Z Q in uJ co Q cc Q C) H El. Q >- 1- B618 Concrete Cu. Yds. L/F Per Per L/F Cu. Yd. 0.0582 17.2 T 1 SLOPE 3/4" per ft. 10' TO SLOPE 3/4" per ft. .4 A 4 18" 26" 3" R 3" R 1 4 c NOTE EXPANSION JOINT SPACING 100' 8" 1/2" R d 4 4 A 1 6 1 13 1/2" 1 ASSOCIATES LTDy 922 Mainstreet Hopkins, Mn. 55343 (612) 933 -0972 fax: (612) 933 -1153 B618 CONCRETE CURB & GUTTER DETAIL FIGURE 14 cc LL. Mountable Concrete Cu. Yds. L/F per per L/F Cu. Yd. 0.0540 18.5 SLOPE 1/4" PER FOOT \ LTD 16' w /PARKING LANE T 7" 1 12" 922 Mainstreet Hopkins, Mn. 55343 (612) 933 -0972 fax: (612) 933 -1153 28" \ \ \ \ • a -A a 4 \ a • .R =12" a . 4 Q \ • \ a d v v \ 16" \ \ \ \ NOTE EXPANSION JOINT SPACING 100' ALTERNATES C & D MOUNTABLE CONCRETE CURB & GUTTER DETAIL A \ \ f 4" 10 -1/2" 6-1/2" FIGURE 16 cc cc ILI CC W U CC 1- '1 ZCS< 8 65 CO m M W mUU O ! ffi(c 11§ tog 3 j . • ;gig 8>gc2 F- W O � W o Q a a 2 m i m I ti cc LL 1 ch cig RLK ASSOCIATES, LTD. Recommendation: Due to the low traffic volumes, the physical characteristics of the street right of way, and the petition submitted by the residents, RLK proposes the following roadway widths be constructed. A 20 foot driving surface with edge control so that the effective width of the street will be approximately 22 feet to the back side of the edge control. The width and edge control would consist of design details consistent with the characteristics of Figures 15 and 16. The two exceptions are: 1) At locations where it is necessary to protect significant landscape features (i.e., plant materials, retaining walls, etc.) the driving surface be reduced to approximately 18 feet in width and the back to back of the edge control would be 20 feet in width. 2) At intersections and corners in the roadway wider radiuses are proposed in order to accommodate the turning movements of the vehicular traffic. It is further recommended that the colored curb and gutter concept be implemented in the Knollwood neighborhood The exact specifications relating to the color of the concrete would be worked out during the detailed design phase of the project. The overall assessable project costs will be divided on a 70% private/30% City basis with the exception of the added cost of the colored concrete edge control. The cost estimate of this recommendation is $517,900. Alleyway (Public Drive) A short publicly maintained section of roadway that is unnamed exists south of Cottage Downs approximately 100 feet west of Valley Way and is described on Figure 19. It serves three properties: 410 Cottage Downs, 804, and 810 Valley Way. City Public Works crews have maintained this roadway over the past years; maintaining the bituminous surface with patching and seal coating, and snow plowing the area during the winter months. Additionally, the City picks up trash and recycling materials from the appropriate containers that are placed on this roadway, which is in the rear yard area of the residencies. The petition requested reconstruction of the street with bituminous pavement and center drainage. The City recognizes this section of roadway as an "alley". Alleys in City Policy #7 -D, Section 9. are defined as "...minor roadways which service parcels of property along the rear property line." Section 9.02 states "an alley shall be concrete construction. Alley width is generally 10 feet in residential areas..." The significance of the alley designation involves the method of construction, as mentioned, and the assessment formula. When the City reconstructs an alley, 80% of the total project cost will be recovered by assessing the benefiting property for the cost of the improvement. A later section of this report specifically discusses assessments with regard to City Policy #7 -D and the financial impact on the neighborhood property owners. FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 34 1 I \ \ � ' / \` \ i ; \ - k / Av's" • / Z f co Lir cc LL cv c) Q1 a) N N co co W W co RLK ASSOCIATES, LTD. An interesting finding in the consultant's analysis is that there is not an existing public right of way throughout the length, or area, of this alley. Approximately 200 feet X 20 feet of public right of way is shown on the property description maps. Additional easements or property dedication may required if this street is to be reconstructed and maintained as a public "alley An option for the property owners to consider would be to request a vacation of the existing public right of way to the effected property owners. Than the street would be considered a "private driveway" serving the same property owners. The City policy concerning reconstruction would not apply; the property owners could agree on reconstructing the driveway as they have requested in their petition using bituminous materials. Or they could leave the driveway in its current physical condition and repair it as they decide in the future. Under this option all maintenance responsibility would be the burden of the adjacent property owners. The City may request covenants on the deeds of the three properties during the vacation process. This would guarantee the right of the three property owners and their future "assigns" to use the private driveway for access to their property. Two reconstruction options have been reviewed by the consultant relative to this alley way, or unnamed public drive. Option One involves constructing a 6" to 8" concrete pavement according to the City Policy #7 -D. The following preliminary design notes concern Option One: 1) The design thickness of the concrete pavement will be adequate for heavy trash collection vehicles and dependent upon the condition of the subgrade soils. Pavement width would be 10 feet. 2) The 80% special assessment /20% City participation formula are applicable against all construction costs 3) Additional property easements /right of way may have to be dedicated to the City to allow continued maintenance of this alleyway as a public roadway. 4) Other design characteristics include a stabilized, compacted subgrade base; center "V" type cross - section for the concrete pavement with no curbs on the edges; and a positive drainage surface so all rear -yard drainage is allowed to run to Cottage Downs via the alley pavement. 5) The preliminary cost estimate for this option is $6,000. Details on the cost calculations are contained in the appendix to this report. Option Two involves construction of the alleyway utilizing bituminous pavement. Since this option does not conform to Policy #7 -D, if it is to be used, the alleyway would have to be vacated and made into a private driveway, as discussed earlier in this section of the report. The following preliminary design notes concern Option Two: FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 36 RLK ASSOCIATES, LTD. 1) The bituminous pavement thickness would be 2 ", dependent upon the subgrade soils condition, laid upon a 6" Class 5 gravel base. 2) Whether the 80% private /20% public assessment formula would be in effect would have to be decided at the assessment hearing. Currently, the City Policy does not allow bituminous alleyways. 3) Additional easements or right of way would not be needed if the alleyway is vacated. 4) Other design characteristics include those listed under Option One, item #4, with this addition: The City would require that garbage and recycling containers be moved to the public street for Public Works collection purposes. It would be possible, if desired by the property owners, to construct a landscaped, screened area along Cottage Downs where these containers could be stored. Features such as these can be reviewed more thoroughly through communications with the property owners during the detailed design phase. 5) The cost estimate for construction of a 12 foot bituminous roadway through this alleyway is $1,895. Details of this cost estimate calculation are contained in the appendix to this report. MISCELLANEOUS DESIGN ITEMS FOR THE KNOLLWOOD NEIGHBORHOOD IMPROVEMENT LANDSCAPING AND RETAINING WALLS The abundance of mature trees, curvilinear roads, ponds, and the architectural quality of the homes identifies Knollwood as one of the premier neighborhoods within the southwestern suburban area. The proposed project will focus on the street and underground utilities, with as much attention as possible given to the mature tree and landscape features so that the disruption and tree loss will be held to an absolute minimum. The location of utilities, the impact trenching will have on the root system and construction necessary for the roadway will be analyzed. A number of trees are within the right of way, the road and utility alignment will be reviewed to save as many trees and landscape features as possible. RLK cannot guarantee trees will not die as a result of the construction, but through protective measures prior to and during construction, penalties and mitigative care by tree care specialists, it is anticipated tree loss will be reduced and contractors closely monitored. All significant trees proposed to be removed will have new trees installed in the same proximity; RLK proposes the replacement trees to be at least 3" to 4" in caliper size. The landscape estimate includes the cost for the following: o Retaining walls where necessary to protect trees and /or significant site elements FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 37 RLK ASSOCIATES, LTD. Pond Enhancements The ponds provide a unique character to the neighborhood. It is RLK's intention to place an emphasis on landscaping the pond's edge with perennial flowers, shrubbery, and trees. By planting bulbs, such as daffodils, iris and hardy chrysanthemums a season -long splash of color will be achieved. Shrubs and trees are to be selectively placed to enhance viewsheds, provide year round color, and private areas where benches may be selectively placed. The opportunity exists through the placement of plant material to recreate the romantic setting of an English landscape garden. During the forthcoming neighborhood meetings, these landscape concepts will be discussed with the members of the neighborhood. Their input to the process will ultimately decide the bid alternates for the project. Pond enhancement items Such as aerators and fountains were discussed at the preliminary meeting of the Knollwood neighborhood. These issues were to be discussed internally with the neighborhood. Until the City or RLK Associates is notified, RLK will not invest any time on these pond enhancement items. Recommendation: Tree care to prepare significant trees for the construction season Replacement of landscape features, i.e., brick wing walls, private lights and /or address post /mail boxes Added tree planting throughout the neighborhood and to increase the buffer edge along Edgemoor. The type and size of the planting will be determined during the detail design phase. Site amenities as requested by the neighborhood such as benches and /or walkways. It should be noted site amenities specifically requested by the neighborhood may be bid as alternates and added to the entire contract. 1) Alignment of the roadway within the right of way to minimize the amount of tree removal. 2) Alternatives for new retaining walls to protect plant material Keystone at $16.00 /sq. ft. Limestone at $20.00 /sq. ft. Fieldstone Boulders $24.00/sq. ft. 3) Tree losses are proposed to be held to a minimum. Figure 20 is a identification of the tree loss impact. 4) Sloping of lawns will be integrated into the street construction program to soften impact of new roadway. FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 38 PROPOSED TREE LOSS CHART Knollwood Project Trees to be removed Tree 18" Oak Pond 15'Spruce Pond 8'Spruce 8'Spruce Location 830 Edgemoor 716 Valley Way 804 Valley Way 804 Valley Way Trees to be removed unless right -of -way is purchased Pond 2 -24 "Silver Maple 24" Oak (Island) Pond 20' Austrian Pine Pond 8" Green Ash Potential Tree Loss - Mitigative Measures Needed 24" White Oak 24" White Oak 38" White Oak DBL 18" and 20" Cottonwood 16 ",16 ",18 ",36" Cottonwood 36" Oak 1 .5' Conifer 40" Red Oak DBL 24" Oak Island 36" Oak 30" Elm 36" Oak 302 Bridle Lane 705 Valley Way 302 Bridle Lane 302 Bridle Lane 810 Edgemoor 802 Edgemoor 802 Edgemoor 413 Cottage Downs 413 Cottage Downs 414 Wilshire Walk 408 Wilshire Walk 312 Wilshire Walk 705 Valley Way 302 Cottage Downs 413 Cottage Downs 302 Cottage Downs Suggested Mitigative Measures to Assist Trees to Survive Construction o Prune all Hardwoods (Oak, Elms) in cold weather months o Trenching between Red Oak trees to inhibit oak wilt o Protective fencing under canopy of tree o Restrict equipment and stockpiling of materials under drip line of trees o Institute a fertilization program by a qualified tree care professional ASSOCIATES LTD) 922 Mainstreet Hopkins, Mn. 55343 (612) 933-0972 fax: (612) 933 -1153 TREE LOSS IMPACT FIGURE. 20 • RLK ASSOCIATES, LTD. 5) Private irrigation systems will be reviewed and repaired on a lot by lot basis and be under the control of the Construction Manager for restoration. STREET LIGHTING NSP has committed, if requested, to replace the six existing cobra head lights and wooden poles with a shoebox, cut -off fixture on an ornamental fiberglass pole for a total price of $3,000.00. The new system would be owned and maintained by NSP. The neighborhood would pay the capital replacement cost through the special assessment procedure. Operating costs would be paid out of the City Traffic Department Street Light Operation Fund. Additional lighting has been requested by some residents on Edgemoor Avenue. A Street light petition will have to be completed and approved according to City policy prior to the installation of any additional light standards. Discussion on the specifics of this request will be addressed at the future neighborhood meetings and coordinated within the street design process. The lights will be placed as a part of this neighborhood improvement project. All existing lights and proposed locations will have to be serviced with new underground conductors. The conduits are included in the cost estimate for this improvement project. NSP has a number of alternative designs which are approved for installation in neighborhoods such as Knollwood; please refer to Figure #21 for a couple of alternative lighting designs. Within the landscape estimate, approximately $30,000 has been designated for the installation of up to 10 ornamental light standards which will provide the Knollwood neighborhood a signature in regard to street lighting. The new light system chosen to be implemented will be researched further in the detail design phase. COORDINATION WITH THE CITY OF ST. LOUIS PARK ON EDG 1OOR DRIVE The eastern half of the Edgemoor Drive right of way is within the City of St. Louis Park. This area is primarily a wooded and landscaped area that aids in the screening of the Amhurst neighborhood in St. Louis Park from the Knollwood neighborhood. Amhurst was developed in the early 1980's and consists of townhomes with access only from the east. During the feasibility study phase, the staff of St. Louis Park was contacted about participation on an improvement project to Edgemoor Drive. Their response was there would be no benefit to the St. Louis Park property by the improvement of Edgemoor Drive. There is no area for additional property development ;neither is there access to Edgemoor Drive from any St. Louis Park property owners. As a result, the City staff was not willing to suggest a spirit of cooperation would exist on a project of this type; especially through which assessments would be levied on St. Louis Park property. FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 40 25' 24' 23' 22' 21' 20' 19' 18' 17' 16' 15' 14' 13' 12' 11' 10' 9' 8' 7' 6' 5' 4' 3' 2' 1' EST. COST = $700 /POLE ec+ 0 I SHOEBOX ORNAMENTAL LIGHT TRADITIONAL STYLE ACORN DESIGNER STYLE LANTERN DESIGNER STYLE EST. COST = $3500 /POLE • ASSOCIATES LTD.} 922 Mainstreet Hopkins, Mn. 55343 (612) 933 -0972 fax: (612) 933 -1153 ALTERNATIVE STREET LIGHTING POLE & FIXTURE FIGURE 21 RLK ASSOCIATES, LTD. The City of St. Louis Park's boundary will limit the placement of the easterly edge of Edgemoor Drive since the right of way is only 33 feet wide. The City of Hopkins may wish to negotiate with the City of St. Louis Park to acquire all the excess St. Louis Park property to the fence line of the Amhurst property. The City of Hopkins would then have full control on this buffer area adjacent to the Knollwood neighborhood area. Since St. Louis Park sees no benefit in the ongoing improvement, they may be open to this approach. The City of Hopkins has at least two options, as seen by RLK, on the matter of the improvements to Edgemoor Drive. First, the City could complete the project by constructing a complete roadway along Edgemoor Drive and assessing the cost of the improvements to the neighborhood as a whole with City participation limited to the 30% amount indicated by Policy #7 -D. Provided Edgemoor Drive is considered a side street in accordance with Section 11.08, this first option is being recommended. Secondly, the City could improve Edgemoor with a complete roadway and pay the easterly half of the street improvement cost out of City subsidized funds. There is no definition that can be applied to this unique circumstance in Policy #7 -D. Therefore, the City Council should review this as a separate decision package within the scope of the project. TRAFFIC PROBLEMS, VEHICULAR AND PEDESTRIAN Vehicular traffic problems were reviewed in the neighborhood from traffic signing to visibility at intersections and on curves. At the October 28th property owner meeting, this issue was also discussed. The people in attendance indicated, very clearly, they felt there was no problem with traffic. Surveys that were turned into the City indicated a few minor problems. For example, sight distance on Valley Way north of Wilshire Walk was cited as a problem that should be reviewed. Also, the sight distance at the intersections of Wilshire Walk and Cottage Downs with Oak Ridge Road cause motorist inconvenience. One resident commented that speeding of traffic occasionally posed a problem. He was concerned the new streets would exacerbate this problem. There was no concern mentioned about parking problems on the narrow streets. Observations during the preparation of the feasibility study noted that few vehicles park on the streets. Pedestrian problems were not mentioned as a problem by any of the residents relative to the need for trails or sidewalks. However, the need for additional street lighting was pointed out by several residents. During the detailed design phase of the project, these items will be looked at to a closer degree with the residents as the specific design is prepared. Within this report, recommendations have been made for wider street widths on Cottage Downs and Wilshire Walk near Oak Ridge Road. This would help alleviate the sight distance problem and enhance the traffic maneuvering area in these areas of the neighborhood. Additional lighting is also commented on in that appropriate section of this report. These items will be solidified during future meetings with the neighborhood residents. FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 42 RLK ASSOCIATES, LTD. Once the street project is completed, the traffic movement problems that relate to excess vehicular speed and parking problems due to street width will have to be examined. Operation of vehicles should not change appreciably after the implementation of these recommended improvements. However, it may be necessary to add traffic control signs at one or more locations within the neighborhood based upon actual experience. CONSTRUCTION SCHEDULES AND PHASING OF WORK ACTIV1T1JS During the neighborhood meeting on October 28, the issue of construction phasing was discussed at length. It is very obvious this is one of the prime concerns of the neighborhood residents. Figure 22 has been prepared as an example of the construction phasing sequence strategy that may be used during the implementation phase of this project. Several items are important to mention concerning construction in this area: 1) The construction project would be phased so that only portions of the neighborhood area are experiencing construction disruption at a specific time. The underground construction will begin early in the process, with the street work being completed near the end of the construction process. 2) Each resident will have access to his property during the project at all times, with the exception of periods of time when utility or street construction is ongoing directly near the residents driveway. These periods of disruption will be minimized to hours, not days, of disruption. At no time will the resident be unable to access their property with their vehicle for a period of more than a couple of days, if at all, during the course of the project. 3) A full time inspector representing the City shall be assigned to the project. He shall maintain optimum communications with the property owners to deal with the problems of construction. 4) A newsletter will be prepared twice a month explaining the details of the construction project. The residents will be continually updated on the status of the progress of the construction activities. 5) Meetings will be held on a "needs basis" with the residents as the construction progresses through the neighborhood. As with the newsletter, the goal is to inform the residents of what is happening with the construction activities. 6) The schedule for the Knollwood project is included in the earlier sections of the report. It is expected that construction will begin, at the earliest, in mid -May and be completed by mid - October. FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 43 922 Mainstreet Hopkins, Mn. 55343 (612) 933-0972 fax: (612) 933 -1153 FIGURE 22 oa CITY OF MINNETONKA STAB HWY. PHASE 1 PHASE 2 ititmensimol PHASE 3 PHASE 4 PHASE 5 o_ cn cn LL 0 } U RLK ASSOCIATES, LTD. PERMITS FOR CONSTRUCTION OF THE KNOLLWOOD PROJECT Permits will be required for the project from the Minnehaha Creek Watershed District due to the storm sewer work. The Minnesota Pollution Control Agency will require a permit because of the sanitary sewer improvements. Finally, the Minnesota Department of Health will require a permit because of the work on the watermain system. FINANCING OF THE PROJECT Preliminary cost estimates have been completed for the project design alternatives as discussed in this report. These actual estimates of cost are contained in the appendix to this report. A summary of the recommended project costs broken into City participation and special assessments are shown in the table below: Project Description Total Project City Special Costs Costs Assessments Streets (Alternate C) $483,324 $144,997 $338,327 Storm Sewer $119,717 $119,717 - 0 - Sanitary Sewer $ 90,857 $ 90,857 - 0 - Watermain $ 98,020 $ 98,020 - 0 - Alternate Items: Alley south of Cottage Downs $ 6,045 $ 1,209 $ 4,836 Colored concrete for Curbs $ 34,528 - 0 - $ 34,528 Sprinkler system adjustments $ 1,300 - 0 - $ 1,300 Project Total Cost Estimates $833,791 $454,800 $378,991 A portion of the cost of the project, approximately 46 per cent, is proposed to be assessed to the benefiting properties on an adjusted front foot basis based upon the contents of City policy #7 -D for Roadway Improvements. On page 48 is a fairly elaborate table indicating the preliminary estimated costs for each property broken down into categories. The categories demonstrate the estimated project costs for each property for each property in the Knollwood neighborhood, estimated city costs, and estimated special assessments. These costs have been prepared from the preliminary cost estimate data that has been generated through the completion of this feasibility study. They are not based upon a detailed design nor bid prices procured through a competitive bidding process. Therefore, it is likely these numbers will change! FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 45 RLK ASSOCIATES, LTD. The basic cost for the estimated assessments includes the property owners portion of the costs for the street construction as articulated in Policy #7 -D. The alternates, including coloring for the concrete curbs explained earlier in the report; and adjustments to the sprinkler systems that may be found in the boulevard area, are shown as assessed 100 percent to the benefiting property owners. The alley south of Cottage Downs is assessed only to the three benefiting properties that abut the alleyway. The totals for each of the categories, as do all the costs in this report, include a 30% overhead factor. This factor represents approximately 15 percent cost for planning & engineering, approximately 5 percent for City administration and capital interest costs, and an approximate 10 percent contingency fee applied against the project costs. The cost for the easterly half of the Edgemoor Drive street has been included in the project costs, applied against all the properties in the Knollwood neighborhood and assessed on a 70% property owner /30% City basis. If another alternate for funding this cost is found, the overall neighborhood cost would be revised accordingly. Funds for right-of-way acquisition or easements are not included in the assessed or City cost. It is anticipated that the right -of -way and /or easements that are needed will be dedicated at no direct cost to the City. These details will be discussed at forthcoming property owner and City meetings. On the next page after the preliminary assessment role table is a sample assessment write -up sheet that demonstrates the cost impact of the assessment on a typical 100 foot lot in the Knollwood neighborhood. This sample is shown for an assessment spread over 15 years at 8% interest. Additionally, an example of an assessment spread over 20 years has been shown. It is recommended the City consider the 20 year assessment period with these assessments. Assessments in the Knollwood neighborhood are above the average assessments for neighborhood street improvements because of the large lots that exist. Longer periods of time would aid in reducing costs on an annual basis. STATEN' OF PROJECT FEASIBILITY The project as described in this planning and feasibility report is feasible to construct as proposed. It is the opinion of the planners and engineers who authored this report that the project will equal or exceed the proposed assessments to abutting properties. It is recommended that the project be pursued as recommended herein, and that a public hearing be set for December 3, 1991. FEASIBILITY STUDY - KNOLLWOOD NEIGHBORHOOD Page 46 PRELIMINARY ASSESSMENT ROLL TOTAL ESTIMATED PROJECT COST $833,790 CITY COSTS $454,800 TOTAL # OF ASSESSABLE RESIDENTIAL LOTS 48 PROPERTY OWNER BASIC COST $338,327 TOTAL # OF ADJUSTED ASSESSABLE FRONTAGE 5,922.65 PROPERTY OWNER ALTERNATES $40,664 AVERAGE ASSESSABLE COST (W /0 ALTERNATES) PER LOT $7,048 PROJECT ESTIMATED ESTIMATED ASSESS. COSTS PROJECT CITY ADDRESS OF PROPERTY FOOTAGE RATE /FOOT COSTS COSTS * Knollwood Project Percentages 102 Bridle Lane 240 Bridle Lane 302 Bridle Lane 105 Cottage Downs 115 Cottage Downs 210 Cottage Downs 215 Cottage Downs 225 Cottage Downs 275 Cottage Downs 302 Cottage Downs 315 Cottage Downs 325 Cottage Downs 405 Cottage Downs 409 Cottage Downs 410 Cottage Downs 413 Cottage Downs 417 Cottage Downs 420 Cottage Downs 428 Cottage Downs 601 Edgemoor Drive 602 Edgemoor Drive 603 Edgemoor Drive 710 Edgemoor Drive 802 Edgemoor Drive 810 Edgemoor Drive 820 Edgemoor Drive 830 Edgemoor Drive 707 Oakridge Road 707 Oakridge Road 805 Park Terrace 815 Park Terrace 821 Park Terrace 825 Park Terrace 705 Valley Way 712 Valley Way 715 Valley Way 716 Valley Way 804 Valley Way 810 Valley Way 122 Wilshire Walk 203 Wilshire Walk 208 Wilshire Walk 216 Wilshire Walk 301 Wilshire Walk 306 Wilshire Walk 312 Wilshire Walk 408 Wilshire Walk 414 Wilshire Walk TOTALS Notes: * ** ** ** ** 5922.65 120.33 150 150 100 100 117.78 100 100 100 138.83 100 114.6 135.74 100 115.55 103.27 100 100 100 100 100 100 150 144.92 132.99 130.86 129.78 150 150 150 149.58 150 150 150 127.21 150 150 150 150 100 129.14 100 100 150 100 100 100 132.07 5922.65 BASIC COST ALTERNATES ESTIMATED ESTIMATED ESTIMA ASSESSMENT ASSESSMENT SPECIAL COST COST ** ASSESSMENT $139.76 $827,745 $454,800 $338,327 $40,664 $378,991 (w /o alley) 54.94% 40.87% 4.91% 45.79% $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $139.76 $16,817 $20,964 $20,964 $13,976 $13,976 $16,461 $13,976 $13,976 $1',976 $19,403 $13,976 $16,016 $18,971 $13,976 $16,149 $14,433 $13,976 $13,976 $13,976 $13,976 $13,976 $13,976 $20,964 $20, 254 $18,587 $18,289 $18,138 $20,964 $20,964 $20,964 $20,905 $20,964 $20,964 $20,964 $17,779 $20,964 $20,964 $20,964 $20,964 $13,976 $18,049 $13,976 $13,976 $20,964 $13,976 $13,976 $13,976 $18,458 $9,239 $11,518 $11,518 $7,678 $7,678 $9,044 $7,678 $7,678 $7,678 $10,660 $7,678 $8,799 $10,423 $7,678 $8,872 $7,929 $7,678 $7,678 $7,678 $7, 678 $7,678 $7, 678 $11,518 $11,128 $10,212 $10,048 $9,965 $11,518 $11,518 $11,518 $11,485 $11,518 $11,518 $11,518 $9,768 $11,518 $11,518 $11,518 $11,518 $7,678 $9,916 $7,678 $7,678 $11,518 $7,678 $7,678 $7, 678 $10,141 $6,873 $8,568 $8,568 $5,712 $5,712 $6,728 $5,712 $5,712 $5,712 $7,930 $5,712 $6,546 $7,753 $5,712 $6,600 $5,899 $5,712 $5,712 $5,712 $5,712 $5,712 $5,712 $8,568 $8,278 $7,596 $7,475 $7,413 $8,568 $8,568 $8,568 $8,544 $8,568 $8,568 $8,568 $7,266 $8,568 $8,568 $8,568 $8,568 $5,712 $7,376 $5,712 $5,712 $8,568 $5,712 $5,712 $5,712 $7,544 $723 $7,596 $901 $9,469 $901 $9,469 $601 $6,313 $601 $6,313 $707 $7,435 $601 $6,313 $601 $6,313 $601 $6,313 $834 $8,764 $601 $6,313 $688 $7,234 $815 $8,569 $601 $6,313 $2,294 $8,894 $620 $6,519 $601 $6,313 $601 $6,313 $601 $6,313 $601 $6,313 $601 $6,31 $601 $6,3 $901 $9,46 $870 $9,148 $799 $8,395 $786 $8,261 $779 $8,192 $901 $9,469 $901 $9,469 $901 $9,469 $898 $9,442 $901 $9,469 $901 $9,469 $901 $9,469 $764 $8,030 $901 $9,469 $901 $9,469 $2,501 $11,069 $2,501 $11,069 $601 $6,313 $776 $8,152 $601 $6,313 $601 $6,313 $901 $9,469 $601 $6,313 $601 $6,313 $601 $6,313 $793 $8,337 $139.76 $827,750 $454,766 $338,301 $40,368 $378,671 Includes cost of the Concrete alley; 80% Assessments, 20% City. The cost of the concrete alley alternate is added to 410 Cottage Downs, and 804 & 810 Valley Way. The other alternates include coloring for the concrete curbs and adjustment cost for the sprinkler systems in the boulevard area. ASSOCIATES LTD SAMPLE ASESSMENT ANNUAL ASSESSMENT LOT ASSESSMENT TOTAL OVER TIME WIDTH RATE ASSESSMENT 15 YRS. 20 YRS. 100' $63.00 /L.F. $6,500 plus $200 interest on capital 150' $63.00 /L.F. $9,700 Average $1,133 988 Year plus $250 interest on capital If your frontage is 100 feet on Cottage Downs, or any other street in the Knollwood neighborhood, and the assessment rate is set at the Assessment Hearing based on competitive contractor bids by the City at $63.00 per lineal front foot, the assessment would be $6,300 plus interest on the period of construction. The City allows payment to be spread over time If 15 years at an 8% interest rate is allowed, the average annual cost for the improvement would be $759. The assessment can be divided into two payments -- May and October. in this example the first half and second half payment would be $380 each. o 922 Mainstreet Hopkins. Mn. 55343 (612) 933 -0972 fax: (612) 933 -1153 ■ Average $759 $662 Year 1st Half Taxes $380 $331 2nd Half Taxes $380 $331 1st Half Taxes $ 567 $494 2nd Half Taxes $ 567 $494 KNOLLWOOD RESIDENTIAL LOT SAMPLE ASSESSMENT FIGURE 23 CONCRETE THICKNESS SCHEDULE DRIVEWAY 1 THICKNESS 1 SPEC RESIDENTIAL 6" CONCRETE TO BE MN/DOT 3432 CR 3A32M MIX . CBS IGN WITH 6% z :% AIR CONTENT COMMERCIAL 8" RADIUS 5 FT. VERTICAL CURB C(PANSION JOINT 5 FT. SECTION MATERIAL GUTTER LINE 2 FT. TYPICAL DRIVEWAY I.5 FT. WITH "8" TYPE CURB GUTTER 5 FT_ TYPICAL CURB & GUTTER TYPE UD" 922 Mainstreet Hopkins, Mn. 55343 (612) 933 -0972 ASSOCIATES LTD. fax: (612) 933 -1153 22 FT. MAX.RES1DENTIAL 10 FT. MIN. RESIDENTIAL 24 FT. MAX COMMERCIAL MIN. ELEVATION AT BACK OF APRON SHALL BE EQUALTO HEIGHT OF CURB 22 FT. MAX.RESIDENTI AL 10 FT. MIN. RESIDENTIAL • 24 FT MAX. COMMERCIAL MIN_ ELEVATION AT BACK OF APRON SHALL BE EQUAL TO HEIGHT OF CURB • TYPICAL DRIVEWAY WITH '‘D" TYPE CURB 8 GUTTER 3' R. Slope 3/4 Per h.. 1/2' R. 3 GUTTER LINE CITY OF HOPKINS TYPICAL DRIVEWAY OPENING DETAIL EXPANSION JOIN- MATERIAL 1 tiR J TYPICAL CURB & GUTTEF TYPE "B APPENDIX Streets and Restoration * *Public Drive, Cottage Downs ** *Storm Sewer *Sanitary Sewer Water Main ** * ** 1,895 119,717 90,857 99,320 SUMMARY PRELIMINARY COST ESTIMATE KNOLLWOOD STREET RECONSTRUCTION HOPKINS, MINNESOTA 20' TYPICAL DRIVING SURFACE 26' F -F ALT. A ALT. B ALT. C ALT. D ALT. E Bit. Curb B -618 Mountable Mountable B -618 Curb Conc. Curb Colored Conc. Curb Conc. Curb $499,015 $475,810 * ** $483,324 $517,852 $516,052 1,895 119,717 90,857 99,320 1,895 119,717 90,857 99,320 Estimated Project Cost $810,804 $787,599 $795,113 $829,641 $827,841 Alternate Route C - Relocate Sewer Main, Wilshire Walk to Bridle Lane Poly Liner Alt. is $107,887, line main with poly liner, Wilshire Walk to Edgemoor Drive. Option B - Bituminous Option A is $6,045, 7" concrete pavement Does not include costs for perforated underdrains. 1,895 119,717 90,857 99,320 1,895 119,717 90,857 99,320 PRELIMINARY COST ESTIMATE Knollwood - Street Reconstruction Hopkins, Minnesota ALTERNATE A - BITUMINOUS CURB WITH PERFORATED UNDERDRAINS STREET CONSTRUCTION AND RESTORATION (20' F.F. WIDTH) Item No. 1. Bituminous Removal S.Y. 16,400.0 $ 1.25 $ 20,500.00 2. Concrete Driveway Rem. /Replacement S.Y. 100.0 20.00 2,000.00 3. Adjust Gate Valves EACH 6.0 100.00 600.00 4. Common Excavation C.Y. 10,900.0 2.50 27,250.00 5. Subgrade Correction C.Y. 2,500.0 8.00 20,000.00 * 6. Granular Borrow C.Y. 2,500.0 6.00 15,000.00 7. Subgrade Preparation R.S. 66.4 20.00 1,328.00 8. Class 5 Aggregate Base TON 5600.0 6.00 33,600.00 9. Bit. Wear Course, Mn /DOT 2341 TON 1400.0 15.00 21,000.00 10. Bit. Base Course, Mn /DOT 2331 TON 1900.0 12.00 22,800.00 11. Bit. Material for Mixture TON .200.0 140.00 28,000.00 12. Bit. Curb L.F. 13,280.0 3.50 46,480.00 *13. Perforated Underdrains L.F. 3500.0 6.00 21,000.00 14. Topsoil Borrow C.Y. 2,900.0 7.00 20,300.00 15. Sodding S.Y. 22,000.0 2.00 44,000.00 16. Restoration /Landscaping /Lighting L.S. 1.0 60,000.00 60,000.00 Estimated Construction Cost $383,858.00 +30% Engineering, Legal, Administration & Financing $115,157.00 Estimated Project Cost $499,015.00 *For Alternate "A" only Description APPENDIX - 2 Unit Unit Quantity Price Amount PRELIMINARY COST ESTIMATE Knollwood - Street Reconstruction Hopkins, Minnesota ALTERNATE B - B -618 CONCRETE CURB AND GUTTER STREET CONSTRUCTION AND RESTORATION (20' FACE TO FACE WIDTH) Item Unit No. Description Unit Quantity Price Amount 1. Bituminous Removal S.Y. 16,400.0 $ 1.25 $ 20,500.00 2. Concrete Driveway Rem. /Replacement S.Y. 100.0 20.00 2,000.00 3. Adjust Gate Valves EACH 6.0 100.00 600.00 4. Common Excavation C.Y. 10,900.0 2.50 27,250.00 5. Subgrade Correction C.Y. 2,500.0 8.00 20,000.00 6. Subgrade Preparation R.S. 66.4 20.00 1,328.00 7. Class 5 Aggregate Base TON 5500.0 6.00 33,000.00 8. Bit. Wear Course, Mn /DOT 2341 TON 1070.0 15.00 16,050.00 9. Bit. Base Course, Mn /DOT 2331 TON 1400.0 13.50 18,900.00 10. Bit. Material for Mixture TON 160.0 140.00 22,400.00 11. Concrete Curb and Gutter, B -618 L.F. 13280.0 6.00 79,680.00 12. Topsoil Borrow C.Y. 2,900.0 7.00 20,300.00 13. Sodding S.Y. 22,000.0 2.00 44,000.00 14. Restoration /Landscaping L.S. 1.0 60,000.00 60,000.00 Estimated Construction Cost $366,008.00 +30% Engineering, Legal, Administration & Financing $109,802.00 Estimated Project Cost $475,810.00 APPENDIX - 3 PRELIMINARY COST ESTIMATE Knollwood - Street Reconstruction Hopkins, Minnesota *ALTERNATE C - MOUNTABLE CONCRETE CURB AND GUTTER STREET CONSTRUCTION AND RESTORATION (18' Edge to Edge of Gutter, 20' Driving Surface Width) Item No. Description APPENDIX - 4 Unit Unit Quantity Price Amount 1. Bituminous Removal S.Y. 16,400.0 $ 1.25 $ 20,500.00 2. Concrete Driveway Rem. /Replacement S.Y. 100.0 20.00 2,000.00 3. Adjust Gate Valves EACH 6.0 100.00 600.00 4. Common Excavation C.Y. 10,900.0 2.50 27,250.00 5. Subgrade Correction C.Y. 2,500.0 8.00 20,000.00 6. Subgrade Preparation R.S. 66.4 20.00 1,328.00 7. Class 5 Aggregate Base TON 5900.0 6.00 35,400.00 8. Bit. Wear Course, Mn /DOT 2341 TON 1130.0 15.00 16,950.00 9. Bit. Base Course, Mn /DOT 2331 TON 1480.0 13.50 19,980.00 10. Bit. Material for Mixture TON 170.0 140.00 23,800.00 11. Concrete Curb and Gutter, mountable L.F. 13,280.0 6.00 79,680.00 12. Topsoil Borrow C.Y. 2,900.0 7.00 20,300.00 13. Sodding S.Y. 22,000.0 2.00 44,000.00 14. Restoration /Landscaping /Lighting L.S. 60,000.0 1.00 60,000.00 Estimated Construction Cost $371,788.00 +30v Engineering, Legal, Administration & Financing $111,536.00 Estimated Project Cost $483,324.00 *For Alternate "F" total cost, add total square yards parking area times $10.90/s.y. x 1.3 PRELIMINARY COST ESTIMATE Knollwood - Street Reconstruction Hopkins, Minnesota ALTERNATE D - MOUNTABLE COLORED CONCRETE CURB AND GUTTER STREET CONSTRUCTION AND RESTORATION (18' Edge to Edge of Gutter, 20' Driving Surface Width) Item No. Description 1. Bituminous Removal S.Y. 16,400.0 $ 1.25 $ 20,500.00 2. Concrete Driveway Rem. /Replacement S.Y. 100.0 20.00 2,000.00 3. Adjust Gate Valves EACH 6.0 100.00 600.00 4. Common Excavation C.Y. 10,900.0 2.50 27,250.00 5. Subgrade Correction C.Y. 2,500.0 8.00 20,000.00 6. Subgrade Preparation R.S. 66.4 20.00 1,328.00 7. Class 5 Aggregate Base TON 5900.0 6.00 35,400.00 8. Bit. Wear Course, Mn /DOT 2341 TON 1130.0 15.00 16,950.00 9. Bit. Base Course, Mn /DOT 2331 TON 1480.0 13.50 19,980.00 10. Bit. Material for Mixture TON 170.0 140.00 23,800.00 11. Concrete Curb and Gutter L.F. 13,280.0 8.00 106,240.00 Mountable Colored 12. Topsoil Borrow C.Y. 2,900.0 7.00 20,300.00 13. Sodding S.Y. 22,000.0 2.00 44,000.00 14. _Restoration/Landscaping/Lighting L.S. 60,000.0 1.00 60,000.00 Estimated Construction Cost +30% Engineering, Legal, Administration & Financing Estimated Project Cost Unit Unit Quantity Price Amount $398,348.00 $119,504.00 $517,852.00 PRELIMINARY COST ESTIMATE Knollwood - Street Reconstruction Hopkins, Minnesota *ALTERNATE E - B -618 CONCRETE CURB AND GUTTER STREET CONSTRUCTION AND RESTORATION (26' F -F STREET WIDTH) Item No. Description APPENDIX - 6 Unit Unit Quantity Price Amount 1. Bituminous Removal S.Y. 16,400.0 $ 1.25 $ 20,500.00 2. Concrete Driveway Rem. /Replacement S.Y. 100.0 20.00 2,000.00 3. Adjust Gate Valves EACH 6.0 100.00 600.00 4. Common Excavation C.Y. 11,500.0 2.50 28,750.00 5. Subgrade Correction C.Y. 2,700.0 8.00 21,600.00 (incl. gran. backfili) 6. Subgrade Preparation R.S. 66.4 20.00 1,328.00 7. Class 5 Aggregate Base TON 7000.0 6.00 42,000.00 8. Bit. Wear Course, Mn /DOT 2341 TON 1400.0 15.00 21,000.00 9. Bit. Base Course, Mn /DOT 2331 TON 1950.0 13.50 26,325.00 10. Bit. Material for Mixture TON 214.0 140.00 29,960.00 11. Concrete Curb and Gutter, B6 -18 L.F. 13,100.0 6.00 78,600.00 12. Topsoil Borrow C.Y. 2,900.0 7.00 20,300.00 13. Sodding S.Y. 22,000.0 2.00 44,000.00 14. Restoration /Landscaping /Lighting L.S. 60,000.0 1.00 60,000.00 Estimated Construction Cost $396,963.00 +30% Engineering, Legal, Administration & Financing $119,089.00 Estimated Project Cost $516,052.00 PRELIMINARY COST ESTIMATE Knollwood - Street Reconstruction Hopkins, Minnesota STREET CONSTRUCTION AND RESTORATION PUBLIC DRIVE, 410 COTTAGE DOWNS Item No. 1. Common Excavation 2. 7" Concrete Pavement OPTION "A" 7" CONCRETE, 10' WIDE Unit Description Unit Quantity Price Amount C.Y. S.Y. Estimated Construction Cost +30% Engineering, Legal, Administration & Financing Estimated Project Cost 100.0$ 220.0 2.50 $ 250.00 20.00 4,400.00 $ 4,650.00 $ 1,395.00 $ 6,045.00 PRELIMINARY COST ESTIMATE Knollwood - Street Reconstruction Hopkins, Minnesota STREET CONSTRUCTION AND RESTORATION PUBLIC DRIVE, 410 COTTAGE DOWNS Item No. OPTION "B" - Bituminous 12' Wide, 2" 2331 Bituminous Wear, 6" Class 5 Aggregate Base Description *Cost estimate is for portion on public right of way only. Unit Unit Quantity Price Amount 1. Common Excavation C.Y. 100.0 $ 2.50 $ 250.00 2. Class 5 Aggregate Base TON 70.0 6.00 420.00 3. Bituminous Wear Course MnDOT 2331 TON 32.0 15.00 480.00 4. Bituminous Material for Mixture TON 2.2 140.00 308.00 Estimated Construction Cost $ 1,458.00 +30% Engineering, Legal, Administration & Financing $ 437.00 Estimated Project Cost $ 1,895.00 PRELIMINARY COST ESTIMATE Knollwood Street Reconstruction Hopkins, Minnesota STORM SEWER (without underdrains) Item Unit No. Description Unit Quantity Price Amoun . 12" RCP Storm Sewer L.F. 1660.0 $ 18.00 $ 29,880.00 . 15" RCP Storm Sewer L.F. 730.0 19.00 13,870.00 3. 18" RCP Storm Sewer L.F. 100.0 21.00 2,100.00 4. 12" Apron EACH 8.0 400.00 3,200.00 5. 15" Apron EACH 3.0 500.00 1,500.00 6 18" Apron EACH 1.0 550.00 550.00 7 Catch. Basin EACH 31.0 900.00 27 900.00 8. Connect to Existing Storm Sewer EACH 5.0 250.00 1,250.00 9. Rip Rap, Class II C.Y. 28.0 30.00 840.00 *10. Rip Rap, Class IV C.Y. 100.0 30.00 3,000.00 11. Pond Dredging L.S. 1.0 8,000.00 8,000.00 Estimated Construction Cost +30% Engineering, Legal, Administration & Financing Estimated Project Cost *For dike for sedimentation area in Bridle Lane Pond. APPENDIX - 9 $ 92,090.00 $ 27,627.00 $119,717.00 PRELIMINARY COST ESTIMATE Knollwood - Street Reconstruction Hopkins, Minnesota SANITARY SEWER POLYETHYLENE LINER FOR EXISTING MAIN, WILSHIRE WALK TO EDGEMOOR DRIVE Item No. Description Unit Unit Quantity Price Amount 1. U- lining and service wyes L.F. 484.0 $ 45.00 $ 21,780.00 2. 8" PVC SDR 35 SS 0 -10' L.F. 1405.0 16.00 22,480.00 3. 8" PVC SDR 35 SS 10 -12' L.F. 650.0 18.00 11,700.00 4. 8" PVC SDR 35 SS 12 -14' L.F. 200.0 20.00 4,000.00 5. 8" PVC SDR 35 SS 14 -16' L.F. 40.0 21.00 840.00 6. Standard Manholes 0 -10' EACH 9.0 1,000.00 9,000.00 7. Spot Repair EACH 2.0 500.00 1,000.00 8. 8" x 4" PVC Wye EACH 23.0 50.00 1,150.00 9. Connect to Existing Service EACH 23.0 80.00 1,840.00 10. 4" PVC SDR 35 Service Pipe L.F. 400.0 8.00 3,200.00 11. Rock Stabilization L.F. 2000.0 3.00 6,000.00 Estimated Construction Cost +30% Engineering, Legal, Administration & Financing Estimated Project Cost APPENDIX - 10 $ 82,990.00 $ 24,897.00 $107,887.00 IP PRELIMINARY COST ESTIMATE Knollwood - Street Reconstruction Hopkins, Minnesota SANITARY SEWER, ALTERNATE ROUTE "C" RELOCATE MAIN, WILSHIRE WALK TO BRIDLE LANE Item Unit No. Description Unit Quantity Price Amount 1. 8" PVC SDR 35 SS 0-10' L.F. 1885.0 16.00 30,160.00* 2. 8" PVC SDR 35 SS 10-12' L.F. 650.0 18.00 11,700.00 3. 8" PVC SDR 35 SS 12-14' L.F. 200.0 20.00 4,000.00 4. 8" PVC SDR 35 SS 14-16' L.F. 40.0 21.00 840.00 5. Standard Manholes 0-10' EACH 10.0 1,000.00 10,000.00** 6. Spot Repair EACH 2.0 500.00 1,000.00 7. 8" x 4" PVC Wye EACH 23.0 50.00 1,150.00 8. Connect to Existing Service EACH 23.0 80.00 1,840.00 9. 4" PVC SDR 35 Service Pipe L.F. 400.0 8.00 3,200.00 10. Rock Stabilization L.F. 2000.0 3.00 6,000.00 Estimated Construction Cost +30% Engineering, Legal, Administration & Financing Estimated Project Cost * Includes 480 1.f. for relocation of main, Wilshire Walk to Bridle Lane, $7,680 ** Includes 1 manhole for relocation, Wilshire Walk to Bridle Lane, $1,000 APPENDIX - 11 $ 69,890.00 $ 20,967.00 $ 90,857.00 PRELIMINARY COST ESTIMATE Knollwood - Street Reconstruction Hopkins, Minnesota WATERMAIN Item No. Description APPENDIX - 12 Unit Unit Quantity Price Amount 1. Connect to Existing Watermain EACH 15.0 $ 400.00 $ 6,000.00 2. 6" DIP Watermain L.F. 3800.0 13.00 49,400.00 3. 6" Gate Valve EACH 10.0 400.00 4,000.00 4. 6" Hydrant EACH 4.0 1,200.00 4,800.00 5. 1" Corporation Stop EACH 20.0 50.00 1,000.00 6. 1" Curb Stop EACH 20.0 80.00 1,600.00 7. 1" Copper Service L.F. 400.0 10.00 4,000.00 8. Connect to Existing Service* EACH 20.0 100.00 2,000.00 9. Fittings LB. 1600.0 1.50 2,400.00 10. Sprinkler Adjustment L.S. 1.0 1,000.00 1,000.00 Estimated Construction Cost $ 76,200.00 +30% Engineering, Legal, Administration & Financing $ 22,860.00 Estimated Project Cost $ 99,060.00 *Connection to existing service is between the main and property line. Any replacement of the private water service between the house and right of way is the property owner's responsibility. Aa) E • $4 of T3 a0r-1 $_1 • O a -r4 O 0 U) S E a) 1:1 -r4 O 043 -r4 0 (0 4. c0 W r-1 E'O 9 • >, 4-1 a) '0 C. • ) 11 3 >.'0 w r1 0 4s -4-4 4(} rn a) -4-4 a) 0 -r1 U 'O 40 e4-4 0 4-) -r4 U ra O E a) (0 O 0)0)4) ) 14 r 14 0 A P4 - a)1 t a .0 ' 0 •r O f a ° 44 >-. O U) a 4) 4-) to E 50CT0r.4 • O b 1 0 CD .0 14 10 •r4aO w 0 -N a 1-4 -r4 -4-t 4.4 (0 44.. 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EN Q+ O ow a) -rl r-i9 -1 '0 O 444 r-4 00 O -1-► Q 44 N N E.N 0 E M -rl a) M m E W q. -- -� I W U) U)� U) -.-1...v 4-)W 00 O 0 171M 0 4-) O -r1 s.1 1:4 IO AG U) 0 a) a) a) > > > -ri -r1 -pi kr' 14 r 14 c QV' ON C1r 0 WO 0 $40 0 0 0 -0 4- E 'O E N E n CO a)•t' a)d' wN O 0 0 M a wz wz wZ KNOLLWOOD NEIGHBORHOOD MEETING MINUTES Hopkins Raspberry Room November 25, 1991 7:00 p.m. CALL TO ORDER The meeting was opened at approximately 7:15 p.m. by Lee Gustafson, Director of Public Works. Mr. Gustafson introduced the project, provided a synopsis of the background to date and indicated it is the City's and RLK's intent to gather input and comments from the neighborhood regarding the study prepared by RLK Associates. The consultants, Dick Koppy and John Dietrich were introduced and the meeting turned over to Dick Koppy to present the findings and recommendation. The executive summary was utilized as the outline for the discussion and the following minutes identify the discussion which took place. Attached is a copy of the executive summary and list of the individuals in attendance. DISCUSSION A preliminary assessment roll has been prepared. No detail design has been done at this time. Financing: 15 years , at 8% Colored curb. Why is it at 100% to the neighborhood? The City considers it as an extra Lee Gustafson suggested 70 -30 split on items contained in road policy 7D vs. a 100% aesthetic feature. A 20 foot roadway offers a number of attributes. Why doesn't the City consider picking up the cost of the colored curb, not a give and take on the City's part. Policy 7D does not contain colored curb clarification, City Council may have to decide how this assessment will be handled. What is the benefit to the owners? 1. Majority of residents signed a petition for street improvements. Council could force an improvement. City legally has the right to do whatever they want in the right of way. 2. The City is trying to have a joint venture and find an acceptable option and attempt to maintain in acceptable long term condition. The answer is to improve the streets. A petition was signed by the majority of residents in order to obtain the lowest price to have it done. 3. View foils of all existing and proposed utilities roadways and widths were shown on the overhead projector. Slides were also used to illustrate the appearance of features and proposed improvements. Meeting Minutes - Knollwood November 25, 1991 Page 2 The neighborhood is requesting: 1. Bituminous curb - looks the same as existing roadway City desire from a maintenance /policy view. 1. Concrete curb and gutter - colored is not part of 7D Streets 1. Maintain general alignment as currently exists, acquire easements from private property owners /no purchase of right of way will be done. 2. Maintain general alignment to preserve trees, walls, etc. Storm Sewer If the road is existing on private property currently, are assessments necessary.? Are rights grandfathered in? Legally, we as consultants, have to build the project on public right of way. Standing water at 810 and 820 Edgemoor, swale to the drainage system depending on tree location, may be underground. 1. Outflow will not exceed present flow into Minnehaha Creek Watershed 2. Back of report lists problem areas in detail - want to know of areas which we need to take care of. 3. Propose mountable curb and gutter to provide edge control, water removal and life extension of the roadway surface. Discussion on approaching the property owners on easements and the pond issue. The privately owned pond has no existing easement. Neighborhood wants to know /propose color of rip rap for sedimentation pond. Existing storm - Dredging as we place the sedimentation basins with a future clean out planned. Further study is needed on pond maintenance and quantity of dredging. Primarily, the storm water capacity and sediment ponds are adequate drainage system. What is the City's responsibility to maintain the ponds since the water is directed to them? Aeration and water clarity are not a purely aesthetic issue. Aeration of the pond was discussed; additional service on the aerators, conduit to be pulling to the island, expense of the aeration. DRC committee will study aeration issue and get back to City /Consultant with direction. Sanitary Sewer Lines 1. Existing and proposed sanitary sewer maps with alternatives were shown. Meeting Minutes - Knollwood November 25, 1991 Page 3 2. Televised the lines - findings to be reported at the public hearing on December 3 to include costs, esthetics, service to neighborhood, etc. 3. Alternatives to removing pipe from under 602 Edgemoor. 4. Careful evaluation of sanitary sewer will be necessary to determine the cost and amount of work to be performed. 5. What type of guarantee does the neighborhood have regarding replacing pipe which will need replacement in 15 -20 years? RLK is making that determination now. 6. Hedge and tree replacement is not assessable and will be replaced where utility lines are run, e.g. Alternate C for sanitary. Existing Watermain 1. Existing and proposed watermain maps were shown. Discussion included the fact that existing watermain is cast iron pipe. Contact property owners and recommend lead service pipe be replaced. However, it was stated that there is no State law saying lead line be replaced. New watermain will be ductile iron pipe. 2. Looping of two dead end mains. Will improve fire protection and pressure. 3. Replacing of watermain and sanitary sewer will be closely tied due to location of each other. Curb Discussion took place on bituminous curb vs. colored curb. If colored concrete to be used it was felt the split should be 70/30. This is for Council to decide. It was felt that it would be better for the City to split 70/30 than to have City crews making regular maintenance repairs to the bituminous curb. The cost savings to be realized by the City would be significant to have concrete in vs. bituminous. The City should pay for 100 % of the difference between the bituminous curb option and colored concrete, in order to meet the City objectives. There will be a petition presented to Council for the December 3 meeting representing the views of the neighborhood. Landscaping Budget proposed will be used to address the following: 1. Restoration of boulevard and lawns. 2. Retaining walls where necessary 3. Planting of perennial flowers /shrubs at pond's edge. Meeting Minutes - Knollwood November 25, 1991 Page 4 4. Replacement of plant material lost due to construction. 5. Mitigative measures for saving significant trees 6. Increase buffer on Edgemoor Avenue. 7. A total of four trees are proposed to be removed, additional trees may be affected upon detail design investigation. Specifications may be written to protect trees and have contractor replace and water the plants for the first year. 8. Attempt to keep the new road away from the existing trees and not encroach closer than the existing road. 9. Utility trenching locations will have to be closely monitored. Other Discussion The City may attempt to acquire the right of way to the Amhurst fence. Maintenance of the fence was discussed to be left with Amhurst. It was recommended direction come from the DRC on what is needed from the encroachment into St. Louis Park. RLK Associates will work with a design committee from the neighborhood. Project to be bid in mid -March with improvements beginning in May thru October, 1992. The neighborhood wishes will be taken into account. First assessment to be made in April of 1992 with recommendation of 20 years. RLK will have input from private utilities as to their future design and coordinate their improvement with project. Construction phasing presented. Most likely will be under one general contractor. Attempt to keep disruption to a minimum with access to properties at all times. Road surface will most likely be gravel until the end of the project. Paving will be done at the end. Construction to be between May to mid - October. Actual time of construction in your area will be six weeks (plus- minus). Meeting adjourned at 10:00 p.m. Name John Dietrich Dick Koppy Randy Engel Tom Kelley Ben Cohen Jack Helms Harry Smith Charles Simpson Genevieve Simpson Arthur H. Irene Barron Sharron Steinfeldt Oren Steinfeldt KNOLLWOOD NEIGHBORHOOD MEETING November 25, 1991 Hopkins Raspberry Room 7:00 p.m. Representing RLK Associates, Ltd. RLK Associates, Ltd. 810 Valley Way 413 Cottage Downs 602 Edgemoor Drive 805 Park Terrace 825 Park Terrace 301 Wilshire Walk 301 Wilshire Walk 830 Edgemoor Drive 115 Cottage Downs 240 Bridle Lane 240 Bridle Lane 1 Phone Number 933 -0972 933 -0972 933 -6813 835 -7000 (work) 938 -0204 938 -2514 933 -2023 935 -6091 935 -6091 935 -2129 938 -6263 935 -4253 935 -4253 CITY OF HOPKINS Hennepin County, Minnesota RESOLUTION NO: 91 -149 RESOLUTION ORDERING IMPROVEMENT AFTER PUBLIC HEARING KNOLLWOOD STREET RECONSTRUCTION, PROJECT 90 -01 WHEREAS, a resolution of the City Council adopted the nineteenth day of November, 1991, fixed a date for a Council hearing on the proposed improvement of Cottage Downs, Park Terrace, Bridle Lane, Valley Way, Wilshire Walk, Edgemoor Drive and alleyway off Cottage Downs pursuant to a petition of affected property owners; WHEREAS, ten days mailed notice and two weeks published notice of the hearing was given, and the hearing was held thereon on the third day of December, 1991, at which all persons desiring to be heard were given an opportunity to be heard thereon, NOW THEREFORE, BE IT RESOLVED BY THE COUNCIL OF THE CITY OF HOPKINS, MINNESOTA: 1. Such improvement is hereby ordered as proposed in the Council resolution adopted the nineteenth day of November, 1991, and amended as follows: a. Using the guidelines of Roadway Policy #8 -B, the City shall participate in 30 percent of concrete curb and gutter construction costs whether the concrete is colored or of the standard type. b. Although no parking restrictions are being considered as a result of this project, Council reserves the right to examine this issue in the future and streets may be subject to parking restrictions on an "as needed" basis or based upon general City parking requirements. c. The alleyway off Cottage Downs shall be reconstructed with a bituminous surface and concrete curb and gutter to a 10 foot face -to -face width. 70 percent of reconstruction costs shall be borne by the entire neighborhood, and the City shall participate in 30 percent of the costs. d. Parcels of land addressed at 601, 711, 715, 805 and 809 Oakridge Road shall be deleted from further project consideration. • Adopted by the City Council of the City of Hopkins, Minnesota, this third day of December, 1991. ATTEST: 2. RLK Associates, Ltd. is hereby designated as the engineer for this improvement and shall prepare plans and specifications for the making of such improvement. B James A. Genellie, City Clerk Nelson W. Berg, Mayor