CR 95-207 1996 Residential Street Improvements•
•
Supporting Information.
O Feasibility report
O Resolution 95 -106
J T es Gessele
Engineering Superintendent
e
O P K ` p1
November 16, 1995 Council Report 95 -207
1996 Residential Street Improvements
Accept Feasibility Report
Order Public Hearing
Proposed Action.
Staff recommends adoption of the following motion: Move to
accept the feasibility report prepared by MSA Consulting
Engineers as ordered on October 3, 1995 and adopt Resolution
95 -106, Resolution Ordering Public Hearing 1996 Residential
Street Improvements.
Overview.
Council at its October 3 meeting was presented with a staff
report concerning possible reconstruction of streets in the
Campbell /Peaceful Valley /Westbrooke East neighborhoods. Staff
recommended that Council consider reconstruction /overlay
rehabilitation of certain streets in these areas. Staff also
recommended consideration of reconstructing the alley east of 6th
Avenue South, between 7th and 8th Streets South. Council
concurred and authorized MSA Consulting Engineers to prepare a
feasibility report.
MSA has completed the report and determined the project to be
feasible. Council now needs to consider accepting the report and
ordering a public hearing. Staff has met with the neighborhoods
for informational meetings.
Primary Issues to Consider.
• List of streets under consideration and their condition
O Staff recommendation concerning the feasibility study
O Public hearing date
O Proposed schedule
Analysis.
0 List of streets under consideration and their condition:
8th Avenue South (6th to 8th Street South)
7th Avenue South (5th to 8th Street South)
8th Street South (6th to 8th Avenue South)
Alley (east of 6th Avenue South between 7th /8th Streets
South)
Burnes Drive
Sweet Briar Lane (670 L.F.)
Pavement conditions of these roadways are generally poor,
have substandard drainage characteristics, and in some cases
the utilities may need to be replaced. The pavement
management report indicates portions of these streets may be
candidates for overlay. Otherwise total street
reconstruction is the only maintenance strategy at the City's
disposal.
0 Staff recommendation concerning the feasibility report.
Steve Gatlin representing MSA will attend the Council session
to make an oral presentation of the report, a copy of which
is attached. Staff finds the report to be complete and
recommends its acceptance.
0 Public hearing date
Staff recommends Council order a public hearing for
December 19. A public hearing is mandatory in projects that
are funded in whole or in part with special assessments.
Assessments are anticipated here should a project be ordered.
Informational meetings have been held with affected property
owners. Staff proposes to meet with the residents again to
provide details of the feasibility report. These meetings
would be conducted before the December 19 hearing and would
facilitate more meaningful discussion and input from the
public at the hearing.
Council is reminded the feasibility report has been prepared
without benefit of a property owner petition. All Council
action concerning an improvement within the scope of the
report will require a 4/5 vote.
0 Proposed schedule
1995
November -
December: Meetings with neighborhood groups
December 19: Public hearing and authorize plans
1996
January: Public input meetings
Feb. 20: Complete plans, approve plans, order bids
March 12: Open bids
March 19: Order assessment hearing
April 16: Assessment Hearing and adopt assessment roll
May 21: Award bid
June: Start construction
October: Complete construction
•
CITY OF HOPKINS
Hennepin County, Minnesota
RESOLUTION NO. 95 -106
RESOLUTION ORDERING A PUBLIC HEARING
1996 RESIDENTIAL STREET IMPROVEMENTS
WHEREAS, the City Council authorized and directed the preparation
of a report with reference to improvement of certain
streets within the Campbell, Peaceful Valley and
Westbrooke East neighborhoods, and
WHEREAS, the engineering firm of MSA Consulting Engineers has
prepared the aforesaid report for the improvement
herein described,
NOW THEREFORE BE IT RESOLVED by the City Council of Hopkins,
Minnesota:
Adopted by the City Council of the City of Hopkins this 21st day
of November, 1995.
ATTEST:
1. The Council will consider the aforesaid
improvement in accordance with the report and the
assessment of abutting and non - abutting property
for all or a portion of the cost of the street
improvements along 8th Avenue South (6th to 8th
Street South), 7th Avenue South (5th to 8th Street
South), 8th Street South (6th to 8th Avenue
South), alley east of 6th Avenue South (7th to 8th
Street South), Burnes Drive, and Sweet Briar Lane
pursuant to Minnesota Statutes Chapter 429 at an
estimated total cost of $880,345.00.
2. A public hearing will be held in the Council
Chambers of the City Hall at 1010 First Street
South on Tuesday, December 19, 1995 at 7:30 p.m.
to consider said improvement. The city clerk
shall give mailed and published notice of said
hearing and improvement as required by law.
James A. Genellie, City Clerk
By
Charles D. Redepenning, Mayor
Kirk R. Roessler, P.E.
Reg. No. 20389
Ste en D. Gatlin, P.E.
City Engineer
Reg. No. 12754
FEAS - 158.006
FEASIBILITY STUDY FOR
1996 RESIDENTIAL STREET IMPROVEMENTS
HOPKINS, MINNESOTA
NOVEMBER 1995
I hereby certify that this plan, specification, or report was prepared by me or under my direct
supervision and that I am a duly registered Professional Engineer under the laws of the State of
Minnesota.
MSA, Consulting Engineers
1326 Energy Park Drive
St. Paul, MN 55108
Phone #: (612) 644 -4389
Fax #: (612) 644 -9446
Date
Date
158- 006 -10
•
•
CI S
CONSULTING ENGINEERS
1326 Energy Park Drive
St. Paul, MN 55108
612-644-4389
1. 800.888 -2923
Fax: 612. 644.9446
CIVIL ENG NEERING Please find enclosed the preliminary feasibility study for the referenced project. This
Eti VIRONM report addresses street rehabilitation, storm drainage, and utility repair improvements
+u�IC.AI throughout several areas within the City of Hopkins. Also included is a preliminary cost
PANNING estimate and preliminary assessment rates for the project.
SOLID WASTE
STRUCTURAL Please contact our office if you have questions or require further information regarding this
SURVEYING project.
TRAFFIC
TRANSPORTATION Sincerely,
EL EC T RICAN /MECHANICAL
ENGINEER NG
HV AC
POWER DISTRIBUTION
SCADA
SYSTEM CONTROLS
OFFICES IN:
MINNEAPOLIS
PRIOR LAKE
ST. PAUL
WASECA
November 16, 1995
File: 158- 006 -10
Honorable Mayor and City Council
City of Hopkins
1010 1st Street
Hopkins, MN 55343
RE: FEASIBILITY STUDY
1996 RESIDENTIAL STREET IMPROVEMENTS
Dear Mayor and City Council:
MSA, CONSULTING ENGINEERS
Steven D. Gatlin, P.E.
Vice President
Attachments
158/006- 1609.nov
Reviewed by: Public Works
Finance
An Equal Opportunity Employer
Department Date
Transmittal Letter 1
Table of Contents 2
Introduction 3
Scope 3
Existing Conditions 4
Proposed Improvements 6
Easements and Permits 9
Project Cost 9
Financing 10
Assessment 10
Project Schedule 12
Conclusion 13
FEAS - 158.006
CITY OF HOPKINS
TABLE OF CONTENTS
Exhibits No. 1 and 1A 13 -14
Exhibits No. 2 and 2A 15 -16
Exhibits No. 3 and 3A 17 -18
Exhibits No. 4 and 4A 19 -20
Exhibit No. 5 21
Exhibits No. 6 and 6A 22 -23
Exhibits No. 7 and 7A 24 -25
Appendix A - Preliminary Cost Estimate 26
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158- 006 -10
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INTRODUCTION
This feasibility study is submitted as required under Minnesota State Statute 429 regarding the
assessment of proposed public improvements. The City of Hopkins has authorized the feasibility
study for the rehabilitation of approximately 5,500 linear feet of streets and approximately 810
linear feet of alleys located within the corporate boundaries of the City. The 1996 Residential
Street Improvements Program is part of the City of Hopkins Annual Pavement Management
Program. More specifically, the following street and alley segment are proposed to receive
improvements:
• Sweet Briar Lane (Minnetonka Mills Road to 670 linear feet to the north)
• Burnes Drive (Minnetonka Mills Road to Cambell Drive)
• 8th Avenue South (8th Street south to 6th Street South)
• 7th Avenue South (8th Street South to 5th Street South)
• 8th Street South (8th Avenue South to 6th Avenue South)
• Alley (Alley located north of 8th Street South and east of 6th Avenue South)
The locations of the proposed improvements are presented in Exhibits No. 1 and 1A.
This feasibility study investigates street improvements necessary to bring existing roadway
surfaces to a condition which conforms to the City of Hopkins residential standard for a 7 -ton per
axle loading. This report will provide project costs associated with two (2) different methods of
roadway rehabilitation. The proposed methods of surface improvements include complete
reconstruction and full width mill and overlay construction. Under those street areas proposed
for street reconstruction, this report will investigate and provide recommendation for utility repair
and /or replacement work as necessary to insure long term surface integrity. Proposed
improvements will not alter existing street dimensions and, upon completion, the new street will
meet the City's 7 -ton per axle design criteria. The identified street areas under study are currently
zoned as residential.
SCOPE
The purpose of this report is to analyze the feasibility of rehabilitating various street surface areas
as presented on Exhibit's No. 1 and 1A. It is proposed to rehabilitate existing bituminous street
surface areas by either a full width mill and overlay operation with miscellaneous concrete curb
repair or complete street reconstruction including curb removal and replacement. Storm drainage
improvements will consist of structure adjustments necessary in matching new street grades,
subgrade draintile construction in those areas showing signs of frost damage or settlement and the
new construction of storm sewer in areas where drainage and standing water conditions are an
issue. In addition to street and storm drainage improvements, this report will also evaluate
underground watermain and sanitary sewer utilities to determine if repair or replacement work is
warranted. 4 -inch diameter watermains will be replaced with new 6 -inch diameter watermains,
curb stops will be relocated to the property line, lead service lines will be replaced with 1 -inch
copper and in general, defective sanitary sewer mains will be removed and replaced with new
PVC pipe and sanitary sewer services showing signs of damage or deterioration will be repaired.
FEAS- 158.006
158- 006 -10
s
Project funding will also be addressed within this report. The costs outlined in this report include
an estimated construction cost based upon 1995 construction bids received on similar projects.
Also included is a 30 % indirect cost which includes anticipated engineering design and
construction costs, administration, legal and fiscal expenses involved with a project of this nature,
and a contingency factor. Preliminary assessment rates are included in this report and were
prepared in accordance with the City of Hopkins's current assessment policy. Sources for funding
proposed improvements include assessments to private and City Park properties, with the
remaining project costs to be funded by the City through general tax funds. The following cost
splits will be utilized in this report:
Cost to Property Owners City Costs
Street Reconstruction 70% 30%
Street Mill and Overlay 0% 100%
Alley Improvements (Reconstruction) 80 % 20 %
Alley Improvements (Mill & Overlay) 0% 100%
Storm Sewer Construction 0% 100%
Sewer and Water Service Repairs 100% 0%
Sanitary Sewer Replacement /Repair 0% 100%
Watermain Replacement /Repair 0% 100%
Remove /Replace Hydrants and Gate Valves 0% 100%
• EXISTING CONDITIONS
In December of 1990, core samples were obtained by Braun Intertec, Inc. in order to evaluate
existing pavement conditions of subject roads and necessary improvements needed to meet the
City standard 7 -ton per axle criteria. The City of Hopkins employed Braun Intertec to perform
the required tests which consisted of 14 penetration borings located on 8th Avenue South, 7th
Avenue South, and 8th Street South. In addition to the penetration borings, visual observations
of subject streets were made by MSA, Consulting Engineers, to determine additional construction
requirements based upon existing surface pavement conditions. On segments of Sweet Briar Lane
and Burnes Drive, as identified by Public Works staff requiring reconstruction, core samples were
not obtained. MSA, Consulting Engineers had to rely on visual observations in the field to
evaluate existing surface pavement conditions. In those street areas where boring information is
available, existing pavement sections generally consist of 2 to 3 inches of bituminous pavement
placed over 3 to 5 inches of Class 5 aggregate base materials. At several locations within the
project site, boring report information indicated that Class 5 base materials were not encountered.
Underlying street subgrade materials primarily consist of a 2 to 3 foot layer of poorly graded sand
with silt, placed over a 3 to 4 foot layer of sandy lean clay to clayey sand type material.
Core information provided for alley improvements indicates existing pavement section to generally
consist of 1 to 3 inches of bituminous pavement placed over 9 to 12 inches of Class 5 aggregate
base materials. Subgrade materials are of a very unstable nature and primarily consist of wet
black peat near the south end and sandy lean clay near the north end of the alley.
FEAS - 158.006
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158- 006 -10
Pavement Condition
The 1994 Pavement Condition Index Report, as prepared by Braun Intertec, was reviewed as part
of the preparation of this feasibility study. The Pavement Condition Index is a procedure that
produces a pavement rating number used to prioritize street improvements and manage the City's
overall transportation system. A major objective of prudent pavement management is to identify
street sections that are still in fair condition, but need rehabilitation work. The timely
identification of streets that need rehabilitation work is more prudent than waiting until the street
has aged and deteriorated to the point that reconstruction is the only feasible alternative. Using
this approach, street surfaces can be kept at a higher service life for lower long -term costs.
Based on the Pavement Condition Index Report, 8th Street, 7th Avenue, and 8th Avenue South
have aged and deteriorated to a condition in which major rehabilitation is appropriate.
Reconstruction efforts will include measures to decrease the rate of decay in the future. These
measures include edge drains, subgrade subcutting and subgrade replacement with clean, well
draining granular borrow materials. These additional measures will serve to remove subsurface
moisture which is the primary cause of frost heave and soil strength loss. Three (3) additional
sections of City street have deteriorated at a lesser rate and at this time, only require the full width
mill and overlay alternative.
Two (2) additional streets, not discussed in Braun Intertec's Pavement Evaluation report, have
been identified by Public Works staff as requiring reconstruction. These street areas, Sweet Briar
Lane and Burnes Drive are rural in nature with existing street widths of 30 feet and no curb and
gutter. Comparing this area of the project to adjacent street areas reconstructed within the last
5 years, and reviewing Braun Intertec's Pavement Evaluation Report dated October 1990 for
Althea Lane, Campbell Drive, Herman Court, and Herman Terrace Street surface areas, we can
safety assume that subsurface soil, water table and existing pavement sections are or will be
similar. Reconstruction efforts in this area do not need to be as substantial and would include
typical reconstruction without the expensive subgrade correction provisions.
Storm Drainage Conditions
Generally, existing storm drainage improvements within the project site are adequate in size to
handle storm water runoff generated from the area. However, MSA's inspection of existing site
conditions have uncovered one (1) critical area where storm sewer improvements, as required to
remove surface runoff, are necessary in considering long term preservation of street reconstruction
improvements. Existing storm sewer with respect to 8th Street South consists of open ditch and
culvert pipe along the north side. Ditch grades generally flow to the west, where at the
intersection of 8th Avenue South an 18 inch CMP culvert carries storm water runoff under 8th
Street South and discharges into City Park property. An open ditch carries storm water runoff
from the culvert discharge location to the west where it outlets into Nine Mile Creek.
Watermain Conditions
An existing 4 inch diameter watermain travels the entire length of 7th Avenue South from 8th
Street South to 5th Street South and provides service to those properties abutting the system. By
FEAS - 158.006
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158- 006 -10
today's standards, this section of 4 inch diameter watermain is inadequate in size to effectively
service the area. Low water pressures, inadequate fire flows, and frequent maintenance repairs
are normally a direct result of an older, smaller watermain system. All other watermains within
the project site are of adequate size being a standard 6 inch diameter main. Exhibits No. 2 and
2A show existing conditions.
Sanitary Sewer Conditions
In August of 1988, and August of 1991, existing sewer laterals within the project site were
televised by Visu -Sewer Clean & Seal, Inc., in order to evaluate existing sewer conditions to
determine if sewer repairs were necessary. The City of Hopkins employed Visu -Sewer to perform
the required testing, analyze the acquired data, and prepare a written log report of their findings.
MSA, Consulting Engineers has thoroughly reviewed this information and has found that
substantial sewer repair work and maintenance is warranted under those streets recommended for
total reconstruction. A particular area of critical concern is that section of 18 inch RCP sanitary
sewer which is located under 8th Street South and flows from the west to the east. This section
of existing trunk sewer includes offset joints, root intrusion, leaking joints, misaligned pipe
sections and large sections of sagging pipe. Televised inspection report information indicated
most of this sewer to be underwater. Existing conditions are shown on Exhibits No. 3 and 3A.
PROPOSED IMPROVEMENTS
Street Improvements
Proposed street sections throughout the project site will match existing street widths of either 30
feet or 38 feet and will be either reconstructed completely, or rehabilitated by the mill and overlay
alternative. The following streets are proposed to be constructed to a total street width of 30 feet
back to back of curb:
Street Name
• Sweet Briar Lane
• Burnes Drive
• 8th Street South (6th to 8th Avenue South)
Improvement /Curb Type
Reconstruct /D-412
Reconstruct /D-412
Reconstruct /B -618
The following streets are proposed to be constructed to a total street width of 38 feet back to back
of curb:
Street Name
• 8th Avenue South (8th to 7th Street South)
• 8th Avenue South (7th to 6th Street South)
• 7th Avenue South (8th to 7th Street South)
• 7th Avenue South (7th to 6th Street South)
• 7th Avenue South (6th to 5th Street South)
FEAS- 158.006
-6-
Improvement /Curb Type
Mill and Overlay /B -618
Reconstruct /B -618
Reconstruct /B -618
Mill and Overlay /B -618
Mill and Overlay /B -618
158- 006 -10
Significantly deteriorated street sections, such as 7th Avenue, 8th Avenue, and 8th Street South
would receive complete reconstruction improvements which would also include subgrade
replacement and draintile construction associated with removing moisture from the subgrade. The
milling and overlay alternative would be utilized for those streets that can be rehabilitated, but
show higher potential for reflective cracking. Pavement typical sections are shown on Exhibits
No. 4, 4A, and 4B. The approximate length of streets to be reconstructed is 3,500 linear feet,
while the total mill and overlay length is 2,000 linear feet.
In addition to street rehabilitation improvements, this report also recommends surface
improvements associated with the existing alley located north of 8th Street South and east of 6th
Avenue South. Normally, Hopkins City policy requires improving all City alleys with a concrete
paved surface. However, this alley segment warrants a bituminous paved surface. Excessive peat
depths, as identified in Braun Intertec's Pavement Evaluation Report dated December 1990, and
the Alley's close location to an existing wetland area dictate that the construction of a concrete
paved surface is not feasible from an engineering standpoint. It is not practical to construct a rigid
concrete pavement over such unstable subsoil. In addition to the engineering related issues, long
term maintenance effects were also considered in this recommendation. If the alley was
constructed of concrete, it is very likely that the pavement would exhibit differential settlement
in the future resulting in an uneven surface causing severe maintenance problems.
Proposed improvements over this alley section include a combination of the reconstruction and
overlay alternatives. It is proposed to reconstruct, to a width of 14 feet, the north -south section
of the existing alley. This section of alley, from the north end to the south end, is approximately
480 linear feet in length and is constructed over 4 to 6 feet of wet black peat. Reconstructive
efforts would include existing bituminous and aggregate base removal, 2 foot subcut of underlying
subgrade materials (primarily black peat), placement of geotextile fabric, 2 foot subgrade
replacement with a select granular borrow material, 6 inches of Class 5 aggregate base, and a 2
inch lift of bituminous wear course materials. Further removal of underlying peat materials would
make this section of existing alley cost prohibited. The remaining east -west sections of the
existing alley also require surface rehabilitation. Moderately deteriorated pavement surfaces and
fair to good subgrade materials warrant only a 2 inch mill and overlay at this time. The total
length of existing alley to be milled and overlayed is approximately 330 linear feet.
Total project costs associated with reconstruction and rehabilitation improvements are presented
in the cost section of this feasibility study (Appendix A).
Storm Sewer Improvements
As noted in the existing conditions section of this feasibility report, one (1) area within the project
site will require storm sewer improvements necessary in conveying surface runoff from street
areas. Proposed storm sewer improvements along 8th Street South will serve to eliminate standing
water conditions, improve pavement strength and overall performance, and provide a finished
product which is appropriate for the surrounding neighborhood. Improvements include the
construction of catch basins, manholes, pipe aprons as necessary to collect runoff from proposed
swale areas lying north of 8th Street, storm sewer pipe ranging in size from 12 inch diameter to
27 inch diameter and partial filling of existing ditch areas to create a drainage swale. In addition
FEAS- 158.006
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158- 006 -10
27 inch diameter and partial filling of existing ditch areas to create a drainage swale. In addition
to storm sewer improvements, a detention - sediment removal basin may be required prior to
discharging storm water runoff into Nine Mile Creek. This issue will be further explored during
engineering design with the local governing Watershed District to insure that all criteria are met.
Construction costs associated with a detention - sediment removal facility have been included in this
report.
In addition to storm sewer improvements required for 8th Street South, structure adjustments
within other areas of the project site will be necessary to provide surface continuity with the new
pavement surface. Proposed storm sewer improvements are presented on Exhibit No. 7. All
project costs associated with storm sewer improvements are presented in the cost section of this
feasibility study (Appendix A).
By regrading Burnes Drive and Sweet Briar Lane and installing concrete curb and gutter, we feel
that existing drainage can be improved. Stormwater runoff will be directed to Minnetonka Mills
Road where existing storm sewer is available one or two blocks away.
Watermain Improvements
As noted in the existing conditions section of this feasibility report, 7th Avenue South from 8th
Street to 5th Street South has an existing 4 inch diameter watermain below it's street surface. In
this report, 7th Avenue South from 8th Street to 7th Street is the only street section recommended
for complete reconstruction. Upon completing reconstruction improvements, and with proper
maintenance, the City of Hopkins can expect a road surface life of approximately 20 years.
Therefore, in order to insure road surface integrity and minimize unnecessary repair, this report
recommends upgrading the existing 4 inch diameter system to a larger 6 inch diameter system.
Proposed improvements are shown on Exhibit No. 5. Proposed watermain improvements include
complete removal of all watermain pipe, hydrants, gate valves, and services to the right -of -way
and replacement with a new 6 -inch diameter system. Additional fire hydrants and gate valves will
be added to the system as required to standardize. This work is proposed only under that section
of 7th Avenue South recommended for reconstruction. Watermain improvement within other
areas of the project will primarily consist of repairs and adjustments as needed. Estimated project
costs for these repairs and improvements are outlined in Appendix A.
Sanitary Sewer Improvements
As noted in the existing conditions section of this feasibility report, MSA, Consulting Engineers
has thoroughly reviewed televised information as documented by Visu -Sewer Clean & Seal, Inc.
dated August of 1988 and August of 1991. The televised reports, as provided by the City of
Hopkins, show substantial evidence that miscellaneous sanitary sewer repair work is warranted
throughout the project site. As with proposed watermain improvements, this report has focused
on those sections of street recommended for complete reconstruction. Proposed sanitary sewer
improvements primarily consist of miscellaneous spot repairs on existing 8 inch VCP sewer
laterals. One major area of concern, identified in Visu- Sewer's report, is the existing 18 inch
RCP trunk sewer located under 8th Street South. This section of trunk sewer provides service to
a large area, by the nature of it's size, and could potentially cause severe problems if not replaced.
FEAS- 158.006
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158- 006 -10
Proposed improvements include complete removal of approximately 780 linear feet of existing 18
inch RCP sanitary sewer and replacement with new 18 inch PVC pipe. In addition to trunk sewer
replacement, two (2) existing manholes will require complete removal and replacement.
Construction operations shall provide for a structurally sound system capable of supporting new
roadway improvements and eliminating costly repairs. Proposed improvements /repairs are shown
on Exhibits No. 6 and 6A. In addition to recommended repair on sections of deteriorated sanitary
sewer, the entire line should be cleaned after construction and root treated for those segments
showing signs of existing root intrusion. Estimate project costs for sanitary sewer repair and
reconstruction work are shown in Appendix A.
EASEMENTS AND PERMITS
All street and utility construction work will be conducted within existing City park areas and
roadway right -of -ways. No additional easements will be required for proposed improvements.
As discussed earlier in this report, storm sewer improvements, as well as, sanitary sewer and
watermain replacement/repair work is required. The following agencies will require permits for
these improvements:
• Minnesota Health Department - Watermain construction
• Minnesota Pollution Control Agency - Sanitary sewer construction
• Nine Mile Creek Watershed District - Storm sewer construction
PROJECT COST
The estimated construction costs for proposed street improvements are presented in Appendix A
included at the back of this report. The estimated indirect cost items such as engineering, city
administration, fiscal, legal expenses, and contingency costs have been estimated at 30 %. The
following is a summary of the anticipated costs for the project.
A. Sweet Briar Lane and Burnes Drive Improvements
FEAS - 158.006
Street Reconstruction
Sanitary Sewer Repair
TOTAL COST $164,530
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$139,830
24.700
158- 006 -10
B. 7th Avenue, 8th Avenue, and 8th Street South Improvements
FINANCING
Street Reconstruction (8th Street South)
Street Reconstruction (7th Avenue & 8th
Street Mill & Overlay
Storm Drainage Improvements
Watermain Replacement /Repair
Sanitary Sewer Repair
City Park - Parking Lot
Alley - Reconstruct /Mill & Overlay
TOTAL COST
GRAND TOTAL
ASSESSMENT
FEAS - 158.006
-
$106,600
Avenue) 238,050
83,135
94,550
62,350
72,150
17,560
41.420
$715,815
$880,345
Based upon an anticipated construction cost of approximately $677,190, the estimated total project
cost is $880,345. This cost includes 30% for indirect and contingency costs.
The recommended means of financing the rehabilitation of streets within the project site, identified
on Exhibits No. 1 and 1A, is through a combination of special assessments to benefitted properties
and City financing. The benefitted properties are proposed to be assessed in accordance with the
City's current assessment policy.
The City will assume a portion of the project costs for street rehabilitation improvements and all
project costs associated with the utility maintenance and repairs. Assessments will be paid either
upon completion of the assessment hearing or over a period of time established by Council action
at a interest rate obtained during the time of bond sale. Estimated assessment rates per lot
equivalent are as follows:
• Sweet Briar Lane and Burnes Drive Improvements - $3,626 per parcel
• 7th Avenue and 8th Avenue South Reconstruction - $4,629 per parcel
• Alley - Reconstruction/Mill & Overlay Improvements - $932.80 per parcel
Assessments are proposed to be levied against the benefitted properties as outlined in the City of
Hopkins current assessment policy for street reconstruction. Contrary to the City of Hopkins'
current assessment policy, total project costs associated with 8th Street reconstruction
improvements are proposed to be funded by the City. This amendment to the policy will provide
for an economically feasible project for those residents abutting 7th Avenue South being assessed
for reconstruction improvements. In addition, the City of Hopkins may have a difficult time
proving benefit to those properties abutting 6th and 8th Avenues South. 6th Avenue South
residents receive no street improvements from the proposed improvements, and 8th Avenue
residents receive mill and overlay improvements at no cost. We have discussed this amendment
158- 006 -10
with City staff and believe it provides equitable treatment for all affected property owners. A
summary of the assessment policy for such a project is presented below. The assessment rates
presented are based upon preliminary cost estimates and will be revised based upon the actual
construction costs.
Street Reconstruction (8th Street South) 0% 100%
Street Reconstruction (All Other Streets) 70% 30%
Street Mill & Overlay Improvements 0% 100%
Storm Drainage Improvements 0% 100%
Watermain Replacement/Repair 0% 100%
Sanitary Sewer Replacement /Repair 0% 100%
City Park - Parking Lot Improvements 0% 100%
Alley - Reconstruction Improvements 80% 20%
Alley - Mill & Overlay Improvements 0% 100%
Sewer and Water Service Line Repair 100% 0%
The methods of determining the assessment per lot equivalent and per front foot are presented
below. The preliminary cost estimates are included as Appendix A. As indicated in the above
table, residents are not assessed for storm sewer improvements, mill and overlay improvements,
City Park improvements, and repair work to existing utilities. An additional item of note is that
the assessment amount is based upon the projected construction costs with respect to the City of
Hopkins Assessment Policy; yet, conditions of Minnesota Statute Chapter 429 must also be
complied with regarding the benefit of the improvement to the affected properties.
A. Sweet Briar Lane and Burnes Drive Improvements
FEAS - 158.006
Improvements Assessed Amount City Share
Street Reconstruction $97,881 $41,949
Sanitary Sewer Repair 0 24.700
TOTALS $97,881 $66,649
Benefitting Parcels = 27 Parcels
Assessment per Parcel = $97,881 =27 = $3,626 per parcel or
$97,881+2,463.71 LF = $39.73 per LF
Assessed City Share
158- 006 -10
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B. 7th Avenue, 8th Avenue, and 8th Street South Improvements
FEAS - 158.006
Improvements Assessed Amount City Share
Street Reconstruction (8th Street South) $0 $106,600
Street Reconstruction (All Other Streets) $166,635 $71,415
Street Mill & Overlay 0 83,135
Storm Drainage Improvements 0 94,550
Watermain Replacement /Repair 0 62,350
Sanitary Sewer Replacement /Repair 0 72,150
City Park - Parking Lot 0 17,560
Alley - Reconstruct/Mill & Overlay 13.992 27.428
TOTALS $180,627 $535,188
Benefitting Parcels:
Street Reconstruction = 36 Parcels
Alley- Reconstruction/Mill & Overlay = 15 Parcels
Assessment Rates:
Street Reconstruction
$166,635 =36 = $4,629 per parcel or $166,635_ 2,393.76 LF = $69.62 per LF
Alley- Reconstruction/Mill & Overlay
$13,992 =15 = $932.80 per parcel or $13,992+1,017.30 LF = $13.76 per LF
PROJECT SCHEDULE
City Council Receives Feasibility Report/ November 21, 1995
Public Hearing Date Ordered
Public Hearing /City Council Orders Plans and Specifications December 19, 1995
City Council Receives Plans and Specifications/ February 20, 1996
and Sets Bid Opening
City Council Receives Bids, Schedule Assessment Hearing March 19, 1996
City Council Holds Assessment Hearing April 16, 1996
City Council Awards Contract May 21, 1996
Construction Begins June 3, 1996
-12-
158- 006 -10
Construction Complete August 30, 1996
CONCLUSION
The total project cost of 1996 Residential Street Improvements within the City of Hopkins is
estimated at $880,345. The project would be completed in accordance with the schedule provided
in this report in the spring and summer of 1996. A portion of the project would be funded
through special assessments to the benefitted properties, as previously discussed, with remaining
costs to be funded by the City of Hopkins.
The 1996 Residential Street Improvements project is technically feasible from an engineering
standpoint and will have to further be evaluated by Council whether or not this project is
economically feasible.
FEAS - 158.006
158- 006 -10
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1996 RESIDENTIAL STREET IMPROVEMENTS
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RECONSTRUCTION
CITY OF HOPKINS
1996 RESIDENTIAL STREET IMPROVEMENTS
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1996 RESIDENTIAL STREET IMPROVEMENTS
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1996 MRESIDENTIAL STREET IMPROVEMENTS
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CITY OF HOPKINS
196 RESIDENTIAL STREET IMPROVEMENTS
EXISTING SANITARY SEWER
0 300
ENNOBEIT
HP006 -EX1
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CITY OF HOPKINS
1996 RESIDENTIAL STREET IMPROVEMENTS
EXISTING SANITARY SEWER
HP006 -EX1
ROW
\1 St
CONSULTING ENGINEERS
14'
19'
EXISTING B618 C&G
19'
MILL 2" OF EXISTING
BIT. SURFACE
- 2 2341 TYPE 41 BITUMINOUS OVERLAY
TYPICAL STREET SECTION
14'
NOTE:
SPOT SUBGRADE CORRECTION AS
DETERMINED IN THE FIELD.
MILL ENTIRE STREET WIDTH TO A 2" DEPTH AND OVERLAY
TO A 2" DEPTH WITH BIT. WEAR COURSE, 2331 TYPE 41
(SEE EXHIBIT NO. 1A FOR LOCATIONS)
CITY OF HOPKINS
1996 RESIDENTIAL STREET IMPROVEMENTS
STREET SECTION (MILL AND OVERLAY)
ROW
ENa0 0 05J
HP006 -EX1
** STREETS TO BE RECONSTRUCTED TO A WIDTH OF 38FT BACK TO BACK
OF CURB WITH B -618 CURB & GUTTER
8TH AVENUE SOUTH
7TH AVENUE SOUTH
* ** STREETS TO BE RECONSTRUCTED TO A WIDTH OF 30FT BACK TO BACK
OF CURB WITH B -618 CURB & GUTTER
8TH STREET SOUTH
ROW
4" PERFORATED DRAINTILE
WITH FILTER WRAP
(WHERE REQUIRED)
VSL
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VARIES
8- 618CURB & GUTTER
1'(TYP)
VARIES 30' OR 38' 8 -6
2.002
TYPICAL STREET SECTION
1 1/2" 2331 TYPE 41A BITUMINOUS WEAR COURSE
TACK COAT
2" 2331 TYPE 318 BITUMINOUS BASE COURSE
6" CLASS 5 AGGREGATE BASE
24" SUBGRADE CORRECTION, BACKFILLED
W /SELECT GRANULAR BORROW, 3149.2B
RECONSTRUCT AND SUBCUT (SEE EXHIBIT NO. 1)
FOR LOCATION
VARIES
CITY OF HOPKINS
1996 RESIDENTIAL STREET IMPROVEMENTS
STREET SECTION (RECONSTRUCTION)
ROW
HP006 -EX1
* STREETS TO BE RECONSTRUCTED TO A WIDTH OF 30FT BACK TO BACK
OF CURB WITH D-412 CURB & GUTTER
SWEET BRIAR LANE
BURNES DRIVE
ROW
VARIES
D & GUTTER
.
30'
B-B
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'TYPICAL STREET SECTION
RECONSTRUCT (SEE EXHIBIT NO. 1A)
FOR LOCATION
VARIES
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TACK COAT
r 2331 TYPE 318 BITUMINOUS BASE COURSE
5" CLASS 5 AGGREGATE BASE
ROW
CONSULTING ENCINI1RS
CITY OF HOPKINS
1996 RESIDENTIAL STREET IMPROVEMENTS
STREET SECTION (RECONSTRUCTION)
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HP006-EX1
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CfTY OF HOPKINS
1996 RESIDENTIAL STREET IMPROVEMENTS
PROPOSED WATERMAIN
0 300
IA>
SO.
REMOVE AND REPLACE EX. HYDRANT W /VALVE
WATERMAIN TO BE REMOVED
AND REPLACED WITH 6 "DIA DIP
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CONSIllTINC BNCINEBRS
CITY OF HOPKINS
1996 RESIDENTIAL STREET IMPROVEMENTS
PROPOSED SANITARY SEWER
EN UO 17
HP006 —EX1
----
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CITY OF HOPKINS
1996 RESIDENTIAL STREET IMPROVEMENTS
PROPOSED SANITARY SEWER
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W 8 "PVC SANITARY SEWER
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STREET I I S0.
24
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0 300
CONSULTING ENGINEERS
CITY OF HOPKINS
1996 RESIDENTIAL STREET IMPROVEMENTS
PROPOSED STORM SEWER
HP006 -EX1
Sweet Briar Lane and Burnes Drive Reconstruction:
I. Street Reconstruction Improvements
Item
Quantity
Unit
Unit
Cost
Extended
Cost
Bituminous Pavement Removal
5,170
SY
$3
$15,510
Concrete Pavement Removal
310
SY
$6
$1,860
Common Excavation
2,400
CY
$5
$12,000
Subgrade Preparation
14.0
Rd Sta
$100
$1,400
Class 5 Aggregate Base
2,100
TON
$7.50
$15,750
Type 31 Bituminous Base
670
TON
$24
$16,080
Type 41 Bituminous Wear
510
TON
$26
$13,260
Bituminous Tack Coat
220
GAL
$1.50
$330
6" Concrete Driveway Restoration
310
SY
$28
$8,680
Concrete Curb and Gutter, D-412
2,340
LF
$6
$14,040
Select Topsoil Borrow
180
CY
$10
$1,800
Sodding, Lawn, and Boulevard
1,550
SY
$2
$3,100
Casting Adjustments
12
EA
$150
$1,800
Subgrade Testing
1
LS
$450
$450
Bituminous Testing
1
LS
$700
$700
Concrete Testing
1
LS
$800
$800
Construction Cost
$107,560
30% Indirect and Contingency Costs
$32,270
Total Reconstruction Cost
$139,830
FEAS - 158.006
APPENDIX A
Preliminary Cost Estimate
City of Hopkins - 1996 Residential Street Improvements
-26-
158- 006 -10
II. Sanitary Sewer Repair
Remove /Repair Existing 8"
VCP Sewer
200
LF
$80
$16,000
Connect to Existing Manhole
2
EA
$1,500
$3,000
Construction Cost
$19,000
30% Indirect and Contingency Costs
$5,700
Total Sewer Repair Cost
$24,700
FEAS- 158.006
-27-
158- 006 -10
7th Avenue, 8th Avenue and 8th Street South Rehabilitation:
I. Street Reconstruction Improvements (7th Avenue & 8th Avenue South)
Item
Quantity
Unit
Unit
Cost
Extended
Cost
Remove Concrete Curb & Gutter
2,400
LF
$3
$7,200
Bituminous Pavement Removal
5,110
SY
$3
$15,330
Concrete Pavement Removal
30
SY
$6
$180
Common Excavation
2,800
CY
$5
$14,000
Subgrade Excavation
4,120
CY
$6.50
$26,780
Select Granular Borrow
4,120
CY
$10
$41,200
Subgrade Preparation
13.2
Rd Sta
$100
$1,320
Class 5 Aggregate Base
2,420
TON
$7.50
$18,150
Type 31 Bituminous Base
695
TON
$24
$16,680
Type 41 Bituminous Wear
570
TON
$26
$14,820
Bituminous Tack Coat
170
GAL
$1.50
$255
6" Concrete Driveway Restoration
30
SY
$28
$840
Concrete Curb & Gutter, B -618
2,440
LF
$6.50
$15,860
Select Topsoil Borrow
160
CY
$10
$1,600
Sodding, Lawn & Boulevard
1,650
SY
$2
$3,300
Perforated Drain Tile
200
LF
$7
$1,400
Casting Adjustments
15
EA
$150
$2,250
Subgrade Testing
1
LS
$450
$450
Bituminous Testing
1
LS
$700
$700
Concrete Testing
1
LS
$800
$800
Construction Cost
$183,115
30% Indirect and Contingency Costs
$54,935
Total Reconstruction Cost
$238,050
FEAS- 158.006
-28-
158- 006 -10
II. Street Reconstruction Improvements (8th Street South)
Item
Quantity
Unit
Unit
Cost
Extended
Cost
Bituminous Pavement Removal
2,100
SY
$3
$6,300
Common Excavation
1,850
CY
$5
$9,250
Subgrade Excavation
1,850
CY
$6.50
$12,025
Select Granular Borrow
185
CY
$10
$18,500
Subgrade Preparation
7.20
Rd Sta
$100
$720
Class 5 Aggregate Base
1,100
TON
$7.50
$8,250
Type 31 Bituminous Base
290
TON
$24
$6,960
Type 41 Bituminous Wear
220
TON
$26
$5,720
Bituminous Tack Coat
110
GAL
$1.50
$165
Concrete Curb & Gutter, B -618
1,200
LF
$6.50
$7,800
Select Topsoil Borrow
80
CY
$10
$800
Sodding, Lawn & Boulevard
900
SY
$2
$1,800
Perforated Drain Tile
300
LF
$7
$2,100
Casting Adjustments
6
EA
$150
$900
Subgrade Testing
1
LS
$300
$300
Bituminous Testing
1
LS
$400
$400
Construction Cost
$81,990
30% Indirect Contingency Costs
$24,600
Total Reconstruction Cost
$106,600
FEAS - 158.006
-29-
158- 006 -10
III. Street Mill and Overlay Improvements
Item
Quantity
Unit
Unit
Cost
Extended
Cost
Remove Existing Concrete Curb
400
LF
$3.50
$1,400
Mill Bituminous Surface
7,500
SY
$2.50
$18,750
Subgrade Correction
750
SY
$10
$7,500
Subgrade Preparation
19.8
Rd Sta
$100
$1,980
Type 41 Bituminous Wear
1,000
TON
$26
$26,000
Bituminous Tack Coat
400
GAL
$1.50
$600
Concrete Curb & Gutter, B -618
400
LF
$10
$4,000
Sodding, Lawn & Boulevard
160
SY
$2
$320
Casting Adjustments
16
EA
$150
$2,400
Bituminous Testing
1
LS
$700
$700
Concrete Testing
1
LS
$300
$300
Construction Cost
$63,950
30% Indirect and Contingency Costs
$19,185
Total Street Mill & Overlay Cost
$83,135
FEAS - 158.006
-30-
158- 006 -10
IV. Storm Drainage Improvements
Item
Quantity
Unit
Unit
Cost
Extended
Cost
Clearing
4
EA
$200
$800
Grubbing
4
EA
$200
$800
Remove Existing 18" CMP Culvert
220
LF
$7
$1,540
Granular Foundation Material
300
TON
$12
$3,600
12" RCP Storm Sewer, CL III
58
LF
$26
$1,510
15" RCP Storm Sewer, CL III
550
LF
$28
$15,400
18" RCP Storm Sewer, CL III
98
LF
$30
$2,940
21" RCP Storm Sewer, CL III
320
LF
$32
$10,240
27" RCP Storm Sewer, CL III
120
LF
$35
$4,200
15" RC Pipe Apron
4
EA
$350
$1,400
27" RC Pipe Apron
1
EA
$700
$700
48" Diameter Manhole, 0 -8' Deep
8
EA
$1,200
$9,600
24" x 36" Catch Basin, 0 -8' Deep
3
EA
$1,000
$3,000
Random Rip -Rap
20
CY
$60
$1,200
Subgrade Testing
1
LS
$800
$800
Detention/Sediment Removal
Facility
1
LS
$15,000
$15,000
Construction Cost
$72,730
30% Indirect and Contingency Costs
$21,820
Total Storm Sewer Cost
$94,550
FEAS -158 006
-31-
158- 006 -10
V. Watermain Replacement /Repair
Item
Quantity
Unit
Unit
Cost
Extended
Cost
Connect to Existing Watermain
2
EA
$1,500
$3,000
Remove Existing 4" Watermain
680
LF
$6
$4,080
Remove Existing Hydrant
1
EA
$350
$350
Remove Existing Gate Valve
2
EA
$100
$200
Furnish & Install 6" DIP, CL 52
730
LF
$26
$18,980
Hydrant With Gate Valve
6" Gate Valve
2
2
EA
EA
$1,700
$500
$3,400
$1,000
Reconnect Existing Services
16
EA
$300
$4,800
Remove Existing Lead Service
280
LF
$5
$1,400
Remove Existing Curb Stop
7
EA
$50
$350
Furnish and Install 1" Service
Connection
7
EA
$400
$2,800
Furnish and Install 1" Copper
Service
280
LF
$12.50
$3,500
Fittings
1,000
LBS
$1.50
$1,500
Granular Foundation Material
150
TON
$12
$1,800
Disinfection Testing
1
LS
$500
$500
Subgrade Testing
1
LS
$300
$300
Construction Cost
$47,960
30% Indirect and Contingency Costs
$14,390
Total Watermain Cost
$62,350
FEAS - 158.006
-32-
158- 006 -10
VII. City Park - Parking Lot Improvements
Item
Quantity
Unit
Unit
Cost
Extended
Cost
Bituminous Pavement Removal
680
SY
$3
$2,040
Mill Bituminous Surface
500
SY
$2.50
$1,250
Common Excavation
230
CY
$5
$1,150
Class 5 Aggregate Base
280
TON
$7.50
$2,100
Type 31 Bituminous Base
95
TON
$24
$2,280
Type 41 Bituminous Wear
140
TON
$26
$3,640
Bituminous Tack Coat
40
GAL
$1.50
$60
Striping
1,000
LF
$0.50
$500
Sodding, Lawn & Boulevard
120
SY
$2
$240
Bituminous Testing
1
LS
$250
$250
Construction Cost
$13,510
30% Indirect and Contingency Costs
$4,050
Total City Park Costs
$17,560
VI. Sanitary Sewer Replacement /Repair
Item
Quantity
Unit
Unit
Cost
Extended
Cost
Remove /Repair Existing 8" Sewer
130
LF
$80
$10,400
Remove /Replace Existing Manhole
2
EA
$2,000
$4,000
Remove /Replace Existing 18"
Sewer
780
LF
$45
$35,100
Connect to Existing Manhole
4
EA
$1,500
$6,000
Construction Cost
$55,500
30% Indirect and Contingency Costs
$16,650
Total Sanitary Sewer Cost
$72,150
FEAS - 158.006
-33-
158- 006 -10
VIII. Alley Reconstruct /Mill & Overlay Improvements
Item
Quantity
Unit
Unit
Cost
Extended
Cost
Bituminous Pavement Removal
1,100
SY
$3
$3 ,300
Mill Bituminous Surface
750
SY
$2.50
$1,875
Common Excavation
300
CY
$5
$1,500
Subgrade Excavation
640
CY
$6.50
$4,160
Select Granular Borrow
640
CY
$10
$6,400
Subgrade Preparation
8.1
Rd Sta
$100
$810
Class 5 Aggregate Base
350
TON
$7.50
$2,625
Type 41, Bituminous Wear
200
TON
$26
$5,200
Geotextile Fabric
1,200
SY
$3.50
$4,200
Sodding, Lawn & Boulevard
320
SY
$2
$640
Seeding
0.25
AC
$2,000
$500
Subgrade Testing
Bituminous Testing
1
1
LS
LS
$300
$350
$300
$350
Construction Cost
$31,860
30% Indirect Costs
$9,560
Total Alley Cost
$41,420
FEAS - 158.006
-34-
158- 006 -10