VII.3. Resolution Ordering Public Improvement Hearing for the 2024 Street and Utility Improvements; Klingbeil CITY OF HOPKINS
City Council Report 2023-105
To: Honorable Mayor and Council Members
Mike Mornson, City Manager
From: Eric Klingbeil, PE, City Engineer
Date: October 3, 2023
Subject: Order Public Improvement Hearing - 2024 Street and Utility
Improvements, City Project 2023-10
_____________________________________________________________________
RECOMMENDED ACTION
MOTION TO Adopt Resolution 2023-035 ordering a public improvement hearing for the
2024 Street and Utility Improvements.
OVERVIEW
At the May 2, 2023 City Council meeting, the Hopkins City Council authorized Bolton &
Menk, Inc. to prepare a feasibility report concerning street and utility improvements
along 12th Avenue N from Mainstreet to 1st Street N, 14th Avenue N from Mainstreet to
2nd Street N, 15th Avenue N from Mainstreet to 2nd Street N, 16th Avenue N from
Mainstreet to 1st Street N and 2nd Street N to 3rd Street N, and 2nd Street N from 14th
Avenue N to 15th Avenue N. The report is complete and is now submitted to Council for
review and further action. A summary of the issues is provided here, and staff will
provide a detailed summary of the report at the Council meeting.
a pavement management plan update was provided, included in the discussion was the
next project identified in the Capital Improvement Plan. At that meeting, staff was
directed to prepare to begin to prepare to order a feasibility report to continue with
street and utility improvements as identified in the Capital Improvement Plan.
Staff has worked with Bolton and Menk, Inc. to identify the most cost effective way to
reconstruction the identified neighborhood. It was determined that separating the
neighborhood into multiple discrete projects was the most efficient, cost effective, and
least disruptive methodology. The attached project location map shows the proposed
project sequencing. Based on current street and utility conditions, some segments that
were not previously identified in the CIP have been added, while some segments have
been reclassified to a street resurface project instead of a full reconstruction. An
updated, high-level, cost estimate was also completed. This updated cost estimate
reflects more up to date construction and interest costs, as well as the updated scope
of construction and reconstruction. While costs for the year 2024 project have
decreased slightly, overall the project cost, including street and utility reconstruction and
street surface improvement areas, has increased from $24,991,000 to $29,240,000.
The first step in proceeding with the project is ordering a feasibility report. Staff has
selected a qualified consultant to undertake topographic survey work, geotechnical
Public Works Dept.
evaluation, a benefit appraisal report, and the preliminary engineering report. The cost
of these services is $224,822. Final design and construction observation and
administration services will be negotiated separately after the feasibility report phase
and the councils ordering of the improvement project. Project areas identified as 2025
and 2026 are not included in the scope of this feasibility report.
By moving forward with feasibility for 2024, no commitment to future identified project
areas is made. Ordering feasibility does not authorize the project. Conducting a public
improvement hearing and ordering final plans will be Council action items at a future
meeting.
SUPPORTING INFORMATION
Feasibility Report – Abridged version attached, full report available upon request
Project Location Map
Resolution 2023-035
ANALYSIS OF ISSUES
Scope of Improvements
This project includes the following improvements:
Full reconstruction of the following streets:
o 7th Avenue N from the former HCRRA Alley to Minnetonka Mills Road
o 8th Avenue from 2nd Street N to Minnetonka Mills Road
o 3rd Street N from 5th Avenue N to 8th Avenue N
Reclamation and resurfacing of 6th Avenue N from Mainstreet to 1st St N
Mill and Overlay of the following streets:
o 1st Street N from 5th Avenue N to 8th Avenue N
o 2nd Street N from 5th Avenue N to 8th Avenue N
The pavement condition index for most of the project area is below 40, which indicates
failed pavement and warrants reconstruction. Maintenance procedures such as seal
coating, mill and overlay, or reclamation are no longer effective strategies. Proposed
street improvements include full reconstruction of streets and new curb and gutter.
Water main is proposed to be replaced in the entire reconstruction area. Most of the
existing main is in excess of 60 years old, undersized, and made from cast iron. New
main will be ductile iron, which has better reliability and when properly installed a longer
lifecycle than cast iron. All water services will be replaced from the main to the property
line.
Sanitary sewer improvements consist of replacing old and outdated material mains. The
existing sanitary sewer mains are in excess of 60 years old and are made of an
outdated material, clay.
Proposed storm sewer improvements include new curb and gutter, removal and
replacement of the existing storm sewer mains, upsizing mains in select areas to better
handle larger storm events, and addition of storm sewer inlets to reduce water ponding
in the street.
Pedestrian facilities include:
Replacement of existing sidewalk and pedestrian ramps in the reconstruction
area
Potential addition of new sidewalk to fill in sidewalk gaps on 3rd Street N
During the scoping for this project, it was determined that there was other work that
should be included in the project. Traditionally this work was bid as a separate,
standalone project but in recent years it has been bid with the street and utility
improvement project and the City has received very favorable bid prices as a result.
This additional work will be funded by separate items in the CIP and Budget and
includes the following:
Sanitary Sewer Lining in areas across the City as identified by Public Works
Citywide sidewalk repairs
Public Input
A public informational meeting regarding the improvements was held on September
13th. The meeting format consisted of a presentation of the overall project scope, with
an open house style question and answer session. A 2nd neighborhood meeting has
been scheduled for October 25th to review proposed improvements and provide
detailed information on proposed assessments.
A questionnaire was sent to all properties in the project area in May 2023 in advance of
the neighborhood meetings. Drainage concerns, pedestrian facility concerns, desire for
improved street surface, and property specific concerns were the most common
responses.
Assessments
The proposed street assessments are based on the City’s assessment policy, whereby
70% of the street reconstruction cost and 50% of the water and sewer service
replacement are assessed to benefiting properties. The policy also allows for
assessments to be capped should assessments exceed previous year assessments by
20%; the costs for this project will trigger the assessment cap. A preliminary
assessment roll has been calculated and can be found in the appendix of the attached
Feasibility Report. As with the 2023 Street and Utility Improvement Project staff has
identified properties that were assessed in previous adjacent projects to determine if
the assessment cap would have been in a factor if the projects had been assessed as
one project.
The assessment cap for residential properties is $106.14 per front foot, following the
typical 3% increase per year. Without the cap assessments could be more than double
the capped rate.
Project Budget and Costs
The estimate for this project which includes contingency, and costs for legal,
administrative, and engineering costs for all the work, totals to $7,860,000.
Project costs and funding sources are as follows:
Preliminary cost estimates show the project tracking within CIP budget. Construction
unit prices have begun to stabilize, but construction material costs remain volatile. It is
anticipated the project will remain within the CIP budget.
Project Schedule
Accept feasibility report/order public hearing October 3, 2023
Public Informational Neighborhood Meeting October 25, 2023
Public hearing/order final design November 14, 2023*
Approve final plans/order bids January 16, 2024
Order Assessment Hearing February 20, 2024
Public Informational Neighborhood Meeting March 11-14 (Date TBD)
Conduct Public Assessment Hearing March 19, 2024
Adopt Assessment Roll/Award Contract March 19, 2024
Begin Construction Spring 2024
Complete Construction Fall 2024
*Date has changed from previous project schedules
Staff Recommendation
Staff recommends accepting the feasibility report and ordering a public hearing for
November 14, 2023
Funding Source CIP Budget
Street
Reconstruction
CIP Budget
Street Rehabilitation/ Sewer
Lining/
Pedestrian Improvements
Estimated
Cost
PI-PIR/General
Obligation Bonds
$3,000,000 $450,000 $3,002,000
Assessments 1,046,000 954,000
Storm Sewer Fund 624,000 1,196,000
Sanitary Sewer Fund 1,588,000 60,000 1,172,000
Water Fund 1,585,000 1,536,000
Total $7,843,000 $510,000 $7,860,000
CITY OF HOPKINS
HENNEPIN COUNTY, MINNESOTA
RESOLUTION 2023-035
RESOLUTION ORDERING PUBLIC IMPROVEMENT HEARING FOR
2024 STREET AND UTILITY IMPROVEMENTS
CITY PROJECT 2023-10
WHEREAS, the City Council authorized and directed the City Engineer to prepare a
report with reference to the aforesaid improvement, and
WHEREAS, the City Engineer has caused to be prepared the aforesaid report for
improvements on 6th Avenue N from Mainstreet to 1st Street N, 7th Avenue N from the
regional trail to Minnetonka Mills Road, 8th Avenue N from 2nd Street N to Minnetonka
Mills Road, 1st Street N from 8th Avenue N to 5th Avenue N, 2nd Street N from 8th
Avenue N to 5th Avenue N, and 3rd Street N from 8th Avenue N to 5th Street N and
WHEREAS, the report provides information regarding whether the proposed
improvement is necessary, cost-effective, and feasible; whether it should best be made
as proposed or in connection with some other improvement; the estimated cost of the
improvement as recommended; and a description of the methodology used to calculate
individual assessments for affected parcels,
NOW THEREFORE, BE IT RESOLVED, that the City Council of the City of Hopkins will
consider the improvement of such streets and utilities in accordance with the report and
the assessment of benefitting properties for all or a portion of the cost of the
improvement pursuant to Minnesota Statues Chapter 429 at an estimated total cost of
$7,860,000 and that a public hearing shall be held on such proposed improvement on
Tuesday, the 14th day of November in the Council Chambers at 1010 1st Street South at
7:00 P.M. and the City Clerk shall give mailed and published notice of said hearing and
improvements as required by law.
Adopted by the City Council this 3rd day of October, 2023.
_________________________
Patrick Hanlon, Mayor
__________________________
Amy Domeier, City Clerk
R
FEETSCALE
0 500 1000
HORZ.
LEGEND
RECONSTRUCTION AREA
Figure 1: Project Location Map
H:\HOPK\0T1130543\CAD\C3D\FEASIBILTY\130543_FIG_INDEX_MAP.dwg 8/24/2023 7:27:18 PMR
2024 Central Avenues Improvements
City of Hopkins, Minnesota
MAINSTREET
1ST ST N
2ND ST N
3RD ST N
MIN
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5TH AVE N6TH AVE N7TH AVE N8TH AVE NREHABILITATION AREA
Submitted by:
Bolton & Menk, Inc.
12224 Nicollet Avenue
Burnsville, MN 55337
P: 952-890-0509
F: 952-890-8065
2024 Central Avenues Improvements
Preliminary Engineering Report
City of Hopkins
City Project No. 2023-010
BMI Project No. 0T1.130543
Prepared by: Bolton & Menk, Inc. Certification
2024 Central Avenues Improvements ǀ BMI 0T1.130543
Certification
Preliminary Engineering Report
For
2024 Central Avenues Improvements
City of Hopkins
Hopkins, MN
City Project No. 2023-010
BMI Project No. 0T1.130543
September 2023
PROFESSIONAL ENGINEER
I hereby certify that this plan, specification, or report was
prepared by me or under my direct supervision, and that I
am a duly Licensed Professional Engineer under the laws
of the State of Minnesota.
Signature:
Typed or Printed Name: Nicholas J. Amatuccio, PE
Date: 9/22/2023 License Number: 53639
Prepared by: Bolton & Menk, Inc. Table of Contents
2024 Central Avenues Improvements ǀ BMI 0T1.130543
Table of Contents
I. Executive Summary ......................................................................................................................... 1
Background Information .......................................................................................................... 1
Proposed Improvements.......................................................................................................... 1
Estimated Costs and Proposed Funding.................................................................................... 2
II. Project Introduction ........................................................................................................................ 3
III. Background ..................................................................................................................................... 3
IV. Existing Conditions ....................................................................................................................... 4
Streets ..................................................................................................................................... 4
Storm Sewer ............................................................................................................................ 6
Sanitary Sewer ......................................................................................................................... 6
Watermain .............................................................................................................................. 7
V. Proposed Improvements ................................................................................................................. 7
Streets ..................................................................................................................................... 7
Storm Sewer ............................................................................................................................ 9
Stormwater Management ........................................................................................................ 9
Sanitary Sewer ....................................................................................................................... 10
Watermain ............................................................................................................................ 10
Pedestrian Facilities ............................................................................................................... 11
Driveways .............................................................................................................................. 11
Lawn Irrigation Systems ......................................................................................................... 11
Street Signing and Striping ..................................................................................................... 12
Turf and Landscaping Restoration .......................................................................................... 12
Boulevard Trees ..................................................................................................................... 12
VI. Neighborhood Meetings ............................................................................................................ 13
VII. Estimated Costs ......................................................................................................................... 15
VIII. Special Assessments................................................................................................................... 15
IX. Right-of-Way/Easements/Permits.................................................................................................. 17
X. Project Schedule ............................................................................................................................ 17
XI. Feasibility and Recommendation ................................................................................................... 17
Prepared by: Bolton & Menk, Inc. Table of Contents
2024 Central Avenues Improvements ǀ BMI 0T1.130543
Tables
Table ES-1 – Preliminary Estimated Cost of 2024 Proposed Improvements .............................................. 2
Table 1: Summary of Existing Corridor Conditions ................................................................................... 5
Table 2: Summary of Geotechnical Evaluation ........................................................................................ 5
Table 3: Proposed Sanitary Sewer Improvements ................................................................................. 10
Table 4: Proposed Watermain Improvements ....................................................................................... 11
Table 5: Resident Questionnaire Response Summary............................................................................. 14
Table 6: Preliminary Estimated Cost of 2024 Proposed Improvements .................................................. 15
Appendix
Appendix A: Preliminary Cost Estimates
Appendix B: Figures
Appendix C: Preliminary Assessment Roll
Appendix D: Resident Questionnaires & Neighborhood Meetings
Appendix E: Geotechnical Evaluation
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2024 Central Avenues Improvements ǀ BMI 0T1.130543 Page 1
I. Executive Summary
Background Information
The Hopkins City Council ordered preparation of this Preliminary Engineering Report at its
May 2, 2023 meeting. In general, the goal of the project is to preserve the investments
Hopkins has made in its infrastructure with proper upkeep through the City’s Pavement
Management Program. The preliminary design report has been completed to identify the
appropriate improvements needed as well as the associated project costs and preliminary
estimated assessments.
Proposed Improvements
This report examines potential street and utility construction of several streets in the
Central Avenues Neighborhood in the City of Hopkins. These areas are depicted in Figure 1
of Appendix B. The proposed improvements are described in the body of this report and are
graphically illustrated in Appendix B. In brief, the proposed improvements consist of:
• Full reconstruction of the following street sections in the Central Avenues
Neighborhood with replacement of concrete curb and gutter and concrete sidewalk,
and replacement of watermain, sanitary sewer, and storm sewer utilities.
o 7th Ave N from the HCRRA Alley north of Mainstreet to Minnetonka Mills Rd
o 8th Ave N from 2nd St N to Minnetonka Mills Rd
o 3rd St N from 5th Ave N to 8th Ave N
• Reclamation and resurfacing of 6th Ave N from Mainstreet to 1st St N.
• Mill and overlay of the following street sections.
o 1st St N from 5th Ave N to 8th Ave N
o 2nd St N from 5th Ave N to 8th Ave N
• The possible addition of concrete sidewalks in the following areas.
o North side of 3rd St N from 5th Ave N to 8th Ave N
• Sanitary sewer lining in areas designated by City Staff throughout the City.
All of these improvements would be constructed in one construction season in 202 4. While
this report covers several areas of potential improvements, it will focus primarily on the full
reconstruction streets of the Central Avenues Neighborhood listed above.
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2024 Central Avenues Improvements ǀ BMI 0T1.130543 Page 2
Estimated Costs and Proposed Funding
Cost estimates have been prepared to address the varying needs of all areas reviewed.
Detailed cost estimates are provided in Appendix A and summarized below in Table 1.
Table ES-1 – Preliminary Estimated Cost of 2024 Proposed Improvements
Streets $2,866,000
Sanitary Sewer $849,000
Watermain $1,113,000
Storm Sewer $867,000
Contingencies (15%) $855,000
Engineering & Administration (20%) $1,310,000
Total Estimate Project Costs $7,8 60,000
The project is proposed to be funded with general obligation bonds, utility funds, and
assessments to individual properties. The chart below illustrates proposed funding sources
inclusive of contingencies, engineering, and administration.
PIR (BONDS,
GENERAL TAX
LEVY),
$3,001,700.06 ,
38%
SPECIAL
ASSESSMENTS,
$953,722.18 ,
12%
WATER FUND,
$1,536,272.58 ,
20%
SANITARY
SEWER FUND,
$1,172,103.00 ,
15%
STORM SEWER
FUND,
$1,196,121.90 ,
15%
FUNDING SOURCES
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2024 Central Avenues Improvements ǀ BMI 0T1.130543 Page 3
II. Project Introduction
This report examines the proposed street and utility improvements including storm sewer
replacement, water main replacement, sanitary sewer replacement, and street reconstruction
throughout the following streets as shown on Figure 1 in Appendix B:
• 7th Ave N from the HCRRA Alley north of Mainstreet to Minnetonka Mills Rd
• 8th Ave N from 2nd St N to Minnetonka Mills Rd
• 3rd St N from 5th Ave N to 8th Ave N
This report also examines the following related improvements which are proposed to be
constructed in the same project, but without involvement of special assessments:
• Reclamation and resurfacing of 6th Ave N from Mainstreet to 1st St N.
• Mill and overlay of the following street sections.
o 1st St N from 5th Ave N to 8th Ave N
o 2nd St N from 5th Ave N to 8th Ave N
• The possible addition of concrete sidewalks in the following areas.
o North side of 3rd St N from 5th Ave N to 8th Ave N
• Sanitary sewer lining in areas designated by City Staff throughout the City.
The project in its entirety involves:
• Addition/replacement of storm sewer within the reconstruction area
• Watermain replacement within the reconstruction area
• Water service replacement within the reconstruction area
• Sanitary sewer replacement within the reconstruction area
• Sanitary sewer rehabilitation in areas of need
• Sanitary sewer service replacement within the reconstruction area
• Concrete curb & gutter replacement within the reconstruction area and other areas of need
• Bituminous street removal and reconstruction
• Concrete walk addition/replacement within the reconstruction area and other areas of need
III. Background
The 2024 Central Avenues Improvements project was initiated following its presence for several
years in the City’s Capital Improvement Plan in some capacity. The Hopkins City Council ordered
the preparation of this feasibility report at its May 2, 2023 council meeting. The feasibility study
and report has been completed to better identify the infrastructure improvements needed in the
proposed project area and to better define costs associated with the improvements. This report
will be used as the basis for final design and is also a required step in the State’s Chapter 429
process for special assessments.
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IV. Existing Conditions
Streets
The bituminous streets within the project areas are aged and exhibit various levels of wear
and distress. This is evident on the surface by transverse, block, and alligator cracking. There
is evidence of previous additional street repairs and maintenance throughout the project
area including numerous street patches. Examples of the existing pavement conditions are
shown below.
Consistent with observations of the existing pavements made during preparation of this
report, the City of Hopkins’ Pavement Management System also indicates that the
“Pavement Condition Index” (PCI) for 7th Ave N, 8th Ave N, and 3rd St N is below the
threshold where rehabilitation is cost effective. As such, street reconstruction efforts are
appropriate along 7th Ave N, 8th Ave N, and 3rd St N.
The streets within the project area have varying widths (measured curb face to curb face).
Table 1 below summarizes these and other existing conditions. Parking is typically allowed
on both sides of the streets throughout the neighborhood, except on 1st St N. Large, mature
trees can be found throughout the project within the City’s ROW and near the back of curb.
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Table 1: Summary of Existing Corridor Conditions
Roadway Existing Street
Width
Existing Curb Type
Existing
ROW Width
7th Ave N 35 – 36 feet
Concrete B618 Curb & Gutter – 300’
south of 3rd St N and to the south;
Curb w/ no gutter – Minnetonka Mills
Rd to 300’ south of 3rd St N
66 feet
8th Ave N 31 feet Concrete B618 Curb & Gutter 66 feet
3rd St N 29.5 feet
Concrete B618 Curb & Gutter – between
7th Ave N and 5th Ave N and west of the
alley between 7th Ave N and 8th Ave N;
Curb w/ no gutter – between 7th Ave N
and 8th Ave N, east of the alley
60 feet
6th Ave N 35’ Concrete B618 Curb & Gutter 66 feet
1st St N 28’ – 32’ Concrete B618 Curb & Gutter 60 feet
2nd St N 35’ Concrete B618 Curb & Gutter 66 feet
Subgrade soil sampling was completed throughout the reconstruction area (7th Ave N, 8th Ave N,
and 3rd St N) by Braun Intertec in the Summer of 2023. A copy of Braun Intertec’s Geotechnical
Evaluation Report is included in Appendix E of this report. Eleven soil borings were taken
throughout the reconstruction area, as well as six pavement cores throughout the pavement
maintenance area (6th Ave N, 1st St N, and 2nd St N), and summarized in Table 2 below.
Table 2: Summary of Geotechnical Evaluation
Street Bituminous Thickness Subgrade Material
7th Ave N 4” – 5” Mixture of poorly graded sand, silty sand, clayey
sand, and sandy lean clay
8th Ave N 2.5” – 3.5” Mixture of poorly graded sand and lean clay
3rd St N 2.75” – 4.5” Mixture of silty sand and poorly graded sand
6th Ave N 5” 19” of limestone aggregate base
1st St N 5.5” – 9.5” 4.5” of recycled aggregate base and sand with gravel
2nd St N 4.5” 8.5” – 12” of limestone and recycled aggregate base
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The soils found just beneath pavements in the project area were most commonly fill soils
classified as poorly graded sand, silty sand, clayey sand, or lean clay. A few of the borings in the
project area found slightly organic clay (buried topsoil). Buried topsoil is an undesirable material
for roadway construction as it’s unable to adequately support heavy vehicles, leading to earlier
failure of overlying pavements.
Storm Sewer
The existing storm sewer system materials in the reconstruction area were inventoried in
Summer 2023. The existing storm sewer systems serving the neighborhood are comprised of
reinforced concrete pipe (RCP), varying in size from 12-inch diameter to 54-inch diameter.
The storm sewer catch basins and manholes are mostly precast concrete structures.
There are multiple storm sewer systems serving the project area. 7th and 8th Ave N, from
Minnetonka Mills Rd to 3rd St N drain west down 3rd St N and south to Excelsior Blvd through
existing storm sewer. The remainder of the project area drains south through an existing
trunk storm sewer main on 6th Ave N, ultimately discharging to Nine Mile Creek near Valley
Park.
Drainage issues have been identified throughout the reconstruction project area through
evaluation of site grades and elevations by the project team, through feedback from the
neighborhood residents, and discussions with City Staff. These drainage issues can be
generalized as:
1. Due to the flat grades of some of the streets and alleys, especially 8th Ave N from 2nd
St N to 3rd St N and 3rd St N between 6th Ave N and 5th Ave N, localized drainage
problems are prevalent.
2. On 7th Ave N, between 1st St N and 2nd St N, there are flat grades surrounding the
existing low point, causing flooding and drainage issues for the properties in this
area before the water can clear the existing emergency overflow (EOF) elevation on
7th Ave N.
3. There is a lack of catch basin inlets at a few of the intersections in the project area,
and these limited catch basins can be overloaded during heavier rain events which
causes ponding in the street.
4. There is a lack of gutters along several of the streets to adequately direct water
through areas of flat topography to drainage inlets.
5. Many of the sidewalks throughout the neighborhood have isolated low spots and do
not drain well after rain events or during snow melt.
Proposed storm sewer improvements are discussed later in this report.
Sanitary Sewer
The existing condition of the sanitary sewer system was evaluated through discussions with
City staff and CCTV inspection of the interior of the sewer piping by a City contractor.
Manhole structures were visually inspected in the field by Bolton & Menk. CCTV videos
produced by others were reviewed by Bolton & Menk to confirm existing sanitary mainline
pipe conditions and identify the location of existing sewer service line locations.
The existing sanitary sewer system primarily consists of 8-inch diameter clay pipe, except for
one half block of 7th Ave N between 1st St N and 2nd St N that was replaced with 8-inch
diameter plastic pipe. Clay pipe is susceptible to infiltration and root intrusion over time due
to the large number of joints and the deterioration of the gasket material originally used to
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seal the joints.
The project’s sanitary manholes are made of a mixture of brick, concrete block, and precast
concrete structures. Brick and block structures were typically built around the 1950’s/1960’s
or earlier, whereas precast structures indicate these structures were replaced at some point
after initial construction of the other infrastructure, likely in response to some deficiency
with the original structure. Brick and block manholes are susceptible to infiltration over time
due to cracks and deterioration of the mortared joints. Precast concrete manholes continue
to be used in modern construction and are generally acceptable provided proper gaskets
were provided with the initial construction and remain in good working order.
Service lines in the neighborhood are typically 4-inch or 6-inch and their material may be
clay, cast iron, orangeburg, transite, or PVC. Clay and orangeburg sanitary sewer pipes are
highly susceptible to infiltration by groundwater, causing groundwater to be treated by the
Met Council at its treatment facilities downstream at a cost to the public. The vast majority
of sanitary sewer mains and service lines in the neighborhood are made of clay material.
Based on observations of sewer service replacements to individual properties performed
recently in nearby neighborhoods, potential exists for encountering orangeburg sewer
service pipes during construction of the project. Orangeburg pipe, whic h can generally be
described as layered tar paper wrapped in a round manner to create a pipe, was commonly
installed around the time several neighborhoods in Hopkins originally developed.
Orangeburg pipe is widely known to ‘rot’ where exposed to water, generally on the bottom
of the pipe, and ultimately collapse as it ages and is unable to support the surrounding soil.
Proposed sanitary sewer improvements are discussed later in this report.
Watermain
The existing layout and condition of the water main was determined from record drawings
and discussions with City staff. The water main is primarily 6-inch cast iron pipe (CIP). CIP is
a common watermain material, however upon reaching its useful life tends to fail. Because
it is so brittle, as the soils around the pipe move slowly over decades, CIP cannot support
shearing forces and ultimately breaks. These portions of the watermain system were
installed in the 1950s and 1960s. CIP installed around this time period was also occasionally
installed with lead-packed fittings.
Service lines for single family homes in the project area are typically ¾-inch or 1-inch and
their material may be copper, galvanized steel, or lead.
Proposed watermain improvements are discussed later in this report.
V. Proposed Improvements
Streets
All street pavements within the reconstruction project area have reached a point where
maintenance procedures such as seal coating or milling and overlaying are no longer cost-
effective strategies. 7th Ave N, 8th Ave N, and 3rd St N are scheduled for full reconstruction.
Proposed reconstruction improvements include replacement of concrete curb and gutter
and replacement of the full depth of the pavement section with underlying aggregate base.
It is also proposed to install a sand section under the aggregate base for additional roadway
stability in areas where there are organics (buried topsoil) and other unsuitable soils are
present. Concrete curb will be replaced per City Policy 8.02 with B618 concrete curb and
gutter, which will help extend the life of the pavement by keeping water out of the subgrade
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and will provide a solid edge for the asphalt pavement. Existing drainage patterns will be
maintained and the elevation of the existing roadways at their edge is proposed to
approximate the existing elevations. Attempts at lowering the road will be made (during
final design) where appropriate to improve drainage within and toward the street where
beneficial and practical.
Proposed street widths from face of curb to face of curb will vary from street to street
throughout the reconstruction area. Proposed street widths have been determined based
on a variety of factors, including the need for a consistent street width along each roadway’s
length, the existing roadway width, typical roadway widths throughout the City, the existing
right of way width, minimizing creation of additional impervious area, and avoidance of
significant impacts due to even minor changes in street width. Attempts to avoid impacts to
significant trees was also a consideration during the preliminary design process used to
determine proposed street widths.
The following specific improvements are proposed for each unique roadway corridor:
• 7th Ave N is proposed to be reconstructed, including the replacement of concrete
curb and gutter, at 35 feet wide from curb face to face south of 1st St N and 32 feet
wide from curb face to face north of 1st St N. This will narrow the road north of 1st St
N by approximately 3 feet. Parking regulations will remain consistent with existing
conditions throughout this area.
• 8th Ave N is proposed to be reconstructed, including the replacement of concrete
curb and gutter, at 28 feet wide from curb face to face. This will narrow the road by
approximately 3 feet. Parking regulations will remain consistent with existing
conditions throughout this area.
• 3rd St N is proposed to be reconstructed, including the replacement of concrete curb
and gutter, at 28 feet wide from curb face to face. This will narrow the road by
approximately 1.5 feet. Parking regulations will remain consistent with existing
conditions throughout this area.
The minimum proposed street grade is 0.50% consistent with City standards. Street grades
flatter than 0.50% are undesirable for drainage. In some areas, new low-points with
adequate storm sewer will need to be created to increase roadway longitudinal slope for
proper drainage. These locations will be confirmed during the final design process, but a few
locations have been identified during preliminary design including 7th Ave N between 1st St N
and 2nd St N, 8th Ave N between 2nd St N and 3rd St N, and 3rd St N between 5th Ave N and 6th
Ave N. Overall drainage patterns/directions throughout the project area are not proposed to
change.
The preliminary proposed typical pavement section for all reconstructed streets consists of
2” wearing course, 2” non-wear course, 8” aggregate base class 5, 12” select granular, and
spot subgrade soil corrections.
Pavement maintenance is proposed for the following streets in the project area:
o Reclamation and resurfacing of 6th Ave N, between Mainstreet and 1st St N
▪ 2” wearing course, 3” non-wearing course, 7”+ reclaimed material
o Mill and overlay of 1st St N, between 5th Ave N and 8th Ave N
▪ 2” mill and 2” wearing course
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o Mill and overlay of 2nd St N, between 5th Ave N and 8th Ave N.
▪ 2” mill and 2” wearing course
Full reconstruction is not required on these streets because of one or more of the following
reasons:
• The PCI rating is high enough to be able to use maintenance procedures such as
milling to extend the life of the pavement. (1st St N and 2nd St N)
• The existing concrete B618 curb and gutter is in relatively good condition. (6th Ave N,
1st St N, and 2nd St N)
• The original underground utilities have been replaced and are in good condition. (6 th
Ave N and one block of 1st St N)
• There are no underground utilities. (Most of 1st St N and 2nd St N)
Storm Sewer
All the storm sewer in the project area will be reconstructed for constructability of other
utilities, changing curb alignment, or increase the storm water pipe capacities to meet City
standards for a 10-year rainfall event. Storm sewer will generally be replaced in the same
location as the existing system, other than some additional catch basin inlets and storm
sewer pipe as needed for drainage. The following is a summary of the most significant
improvements proposed to the storm sewer system.
• Storm sewer will be extended down 8th Ave N between 2nd St N and 3rd St N to mid-
block, with additional catch basin inlets to create a new low point on this block with
flat grades. This will improve drainage on this block by providing a location for the
water to flow in the curb line. While other blocks in the project area are not as flat
as this block, they will also be evaluated further during final design to determine if
additional storm sewer pipe and catch basins will be necessary for proper drainage.
• Storm sewer will be extended down 3rd St N to the alley between 6th Ave N and 5th
Ave N and an inlet will be constructed to improve drainage at the alley entrance.
• During final design the roadway profile on 7th Ave N and 1st St N will be further
evaluated to determine if the existing emergency overflow (EOF) elevation can be
lowered, allowing water to flow down 7th Ave N toward 1st Ave N prior to the
potential flooding of the properties near the 7th Ave N low point during a major
storm event.
Stormwater Management
The proposed improvements will result in more than 1 acre of land disturbance; therefore,
stormwater management will be required by the Municipal Separate Storm Sewer System
(MS4) General Permit. At this time, it is not expected that any stormwater management will
be required by Nine Mile Creek Watershed District (NMCWD) with their current rules. If
future rule changes are implemented during final design, the NMCWD stormwater
management rules will be followed.
The water quality volume was calculated as one-half (0.5) inch times the sum of the new
and fully reconstructed impervious surface, equaling approximately 8,430 cubic feet of
required water quality volume. During final design the actual treatment volume will be
verified, and feasible treatment options will be investigated to maximize the treatment of
the water quality volume prior to discharge from the MS4.
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Sanitary Sewer
As summarized in the existing conditions section of this report discussing sanitary sewer,
most of the existing system in the reconstruction area is relatively old, made of an outdated
(clay) material, and in poor condition. Given these conditions, the opportunity to excavate
to this utility given removal of overlying roadway pavement for street reconstruction, and
the City of Hopkins policy to replace clay sewers during street projects, the existing 8” Clay
gravity sanitary sewer system throughout the reconstruction area is proposed to be
replaced with PVC pipe. One section of sanitary sewer on 7th Ave N between 1st St N and 2nd
St N was replaced with PVC pipe in 1989 but will still require a spot repair due to a disjointed
pipe. There is no sanitary sewer on 3rd St N and none is proposed to be installed on this
street.
Where gravity mains are to be replaced, new service wyes will be provided to each home.
Per City policy, sanitary services which are not PVC are proposed to be replaced with PVC
pipe to the right-of-way (ROW) line. New precast concrete manholes will be installed and
will incorporate the City standard 27-inch diameter cover utilizing concealed pick-holes to
minimize inflow and infiltration. The proposed sanitary sewer mainline improvements are
summarized in Table 3 below.
The exact age of all existing pipes listed in Table 3 could not be verified. In such cases, its age
was reasonably estimated based on the known age of other utilities in the area.
Table 3: Proposed Sanitary Sewer Improvements
Roadway From/To Existing Pipe Proposed
Improvements Dia. Matl. Age
7th Ave N HCRRA Alley/1 st St N 8” VCP 1950 8” PVC
7th Ave N 1st St N/300’ north of 1st St N 8” PVC 1989 Spot Repair
7th Ave N 300’ north of 1st St N/Minnetonka Mills Rd 8” VCP 1950 8” PVC
8th Ave N 2nd St N/Minnetonka Mills Rd 8” VCP 1950 8” PVC
3rd St N 5th Ave N/8th Ave N n/a n/a n/a none
Watermain
All existing watermain within the reconstruction project area is proposed to be replaced
with new ductile iron pipe (DIP) as a part of this project. An 8-inch pipe is proposed on all
the roadways to most cost effectively achieve adequate fire flows and water distribution.
Fire Hydrants will also be replaced along the new watermain and gate valves will be added
at each intersection for more efficient operations and maintenance.
Per City policy all water service lines to single family homes are proposed to be replaced to
the right-of-way with a new 1” diameter copper service line. A new curb stop valve and box
will be provided on each service, approximately on the right-of-way line. Multi-family
residential properties and commercial properties will receive a new 6” service line or a
service line matching their existing service diameter, whichever is greater. The proposed
watermain mainline improvements are summarized in Table 4 below.
The exact age of all existing pipes listed in Table 4 could not be verified. In such cases, its age
was reasonably estimated based on the known age of other utilities in the area.
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Table 4: Proposed Watermain Improvements
Roadway From/To Existing Pipe Proposed
Improvements Dia. Matl. Age
7th Ave N HCRRA Alley/Minnetonka Mills Rd 6” CIP 1950 8” DIP
8th Ave N 2nd St N/Minnetonka Mills Rd 6” CIP 1950 8” DIP
3rd St N 5th Ave N/8th Ave N n/a n/a n/a none
Pedestrian Facilities
Replacement of the existing concrete sidewalk is proposed on all streets within the
reconstruction area. This will be necessary due to the street and utility construction and
because the existing sidewalk is in poor condition. The existing sidewalks also do not drain
properly. The sidewalks are proposed to be constructed at 6 feet width. The proposed turf
boulevard width will vary but will be somewhat consistent and slightly wider than existing
since the roadway is being narrowed. The preliminary proposed typical sidewalk section
consists of 4” concrete, 4” aggregate base class 5, and spot subgrade soil corrections.
Installation of new concrete sidewalk is being considered along the north side of 3rd St N
from 5th Ave N to 8th Ave N. This sidewalk will connect sidewalks that run north-south on the
Avenues throughout the neighborhood. Currently, there is only one-half block of sidewalk
on the north side of 3rd St N between 7th Ave N and 8th Ave N, which doesn’t provide an
adequate pedestrian facility to the general public. The project team has reached out to the
properties along 3rd St N to collect their feedback and desire to install a new sidewalk on this
street. If not desired by these property owners, the project will not install the sidewalk and
adequate east-west pedestrian facilities are located nearby on Minnetonka Mills Rd, 2 nd St
N, and 1st St N.
Spot sidewalk replacements are proposed in the street maintenance area as determined by
the engineer in the field for areas with poor drainage, cracked sidewalk, or settled sidewalk
which could become a tripping hazard.
Driveways
All single-family residential driveways within the reconstruction project area receiving new
concrete curb and gutter, will receive a new 5-foot-wide concrete apron adjacent to the
concrete curb. The new concrete aprons will be constructed accordance with City standards
in terms of depth and shape. In addition to the 5-foot driveway apron, additional driveway
pavement disturbed as a part of the project will be replaced in-kind to match the existing
driveway with the street improvements.
Non-residential and multi-family residential properties will receive the City’s standard
concrete commercial driveway entrance apron. Alley entrances will also be replaced with
the City’s standard concrete alley entrance.
Lawn Irrigation Systems
There may be existing sprinkler systems encountered in construction of the project.
Adjacent property owners will need to assist in locating and identifying the type of sprinkler
systems that are in place prior to and during construction if these facilities are to be
protected. The contractor will be required to make efforts to preserve the in-place systems
during construction. Where this is found to be unfeasible, the contractor will be required to
remove and replace or salvage and reinstall the existing sprinkler system.
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Street Signing and Striping
The existing street name signs will be replaced by the contractor to update the signs to the
new City standards. Regulatory signs such as stop and parking enforcement signs will be
replaced to conform to retroreflectivity requirements. Existing crosswalk blocks will be
repainted in the same locations in both the reconstruction and street maintenance areas.
The brick pattern stamped bituminous crosswalk on the south leg of 8th Ave N and
Minnetonka Mills Rd will be replaced with the same or similar material for additional
awareness by Alice Smith Elementary due to student crossings.
Traffic and pedestrian counts were taken at the intersection of 7th Ave N and 1st St N in
response to resident input that the intersection is busy and the desire for an all-way stop
intersection and/or additional pedestrian crossing features. Both vehicle and pedestrian
counts were low and did not meet any of the warrants for an all-way stop or enhanced
pedestrian crossing features, such as an RRFB (Rectangular Rapid Flashing Beacon). This
intersection and all other similar intersections in the neighborhood will keep its current
traffic control layout with stop signs on just one of the street crossings. This intersection will
also keep the same crosswalk blocks after paving for pedestrian crossings.
Turf and Landscaping Restoration
Boulevards will be graded as necessary to facilitate drainage from the existing yards to the
streets. Turf areas disturbed by construction, either due to boulevard grading or utility
service construction, will be graded to match the new street grades and restored with sod in
residential yards. In parks or other areas maintained by the City, and sometimes larger
commercial properties, areas will be restored with seed and mulch (hydroseed).
Landscaping within the project area will be protected where feasible. Landscaping that is
within the right-of-way and/or cannot be protected will either be salvaged and reinstalled
by the contractor or will be the owner’s responsibility. Items including, but not limited to
walls, fences, and pavers, will be salvaged and reinstalled by the contractor. The engineer
will coordinate with individual homeowners on landscape impacts to items including, but
not limited to plantings, decorative rock, and decorative pavers for removal and relocation
by the homeowner.
Boulevard Trees
As with all projects being considered by the City of Hopkins, it is a goal of this project to
protect healthy boulevard trees and/or make improvements to the urban tree canopy
where feasible. Residents echoed the desire to protect healthy trees and remove
dead/dying trees in questionnaire responses and discussion at the neighborhood meetings.
Design and construction of improvements, including appropriate selection of street widths
and utility main placement, are proposed to be completed in a manner to achieve the City’s
goals to save healthy trees. An evaluation of boulevard tree species and condition was
completed in consideration of the adjacent street and utility improvements to facilitate
design and construction and meet these criteria.
Due to their susceptibility to the emerald ash borer, green ash trees are generally
considered undesirable trees. Similarly, silver maple trees are more susceptible to storm
damage than other species, create more litter because of their soft wood and weak, brittle
branches, and thus are not desirable trees to Public Works staff and local residents. Silver
maples are also known to have an intrusive root system that can damage sidewalks and
curbs and penetrate sewer joints. Finally, American Elm are still susceptible to Dutch Elm
disease. These three undesirable species, as well as other trees that are either dead or in
poor health, should either be removed or otherwise not protected through the
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design/construction process.
An inventory of the trees located in the right of way was performed in August 2023 by City
public works staff and Bolton & Menk staff. Consistent with all City of Hopkins annual street
and utility improvement projects, trees that are dead or in very poor condition, and
“undesirable” species in fair or poor condition, are proposed to be removed and replaced.
Approximately 32 boulevard trees within the project area are considered undesirable due to
condition/species. Proposed tree removals are shown in the figures within Appendix B.
Those tree removals identified due to conflicts with utilities or street grading will be further
evaluated during final design to see if reasonable measures can be taken to preserve them.
Options to preserve highly desirable trees in harm’s way include small retaining walls or
moving service lines around trees but is not always feasible.
This project provides an opportunity to increase the health of the neighborhood forest by
replacing some of the undesirable species with trees better suited for boulevard areas. One
tree is proposed to be installed per each tree removed. New 2-inch balled and burlapped
trees are typically planted in replacement of those removed. The City will communicate
with the property owners to replace trees as part of the project in the event tree removal is
necessary. The species of trees to be planted will match the list of species on the City’s
website in cooperation with the City’s Public Works department and as follows: Crab Apple;
Elm; Hackberry; Honey Locust; Ironwood; Japanese Lilac; Kentucky Coffee; Linden; Maacki;
Maple; Swamp White Oak.
Properties located adjacent to boulevard tree removals will be contacted and allowed to
provide input on their desire for a particular tree species to be planted based on the list
provided.
VI. Neighborhood Meetings
A neighborhood meeting occurred on September 13, 2023 with residents and property
owners that are affected by the improvements in the reconstruction area. The City Engineer
and Bolton & Menk Project Manager presented the scope of the project with a discussion of
existing and proposed street and utility conditions, preliminary assessment policies, other
City policies, and project schedule. Additional information on the neighborhood meeting is
documented in Appendix D of this report. There were approximately 10 property
owners/residents who participated in the event in-person but the presentation was also
broadcasted and recorded over Zoom with 6 more residents in attendance online. The
presentation is also available on the project website (www.Hopkins-2024.com) for residents
to view at their convenience. Some of the most common questions or comments received
from residents at the neighborhood meeting are as follows:
1. Some residents were interested in additional sidewalks on 3rd St N where there
currently is none.
a. The project team has reviewed this area for adding a sidewalk and has
reached out to the property owners along 3rd St N between 5th Ave N and 8th
Ave N to see if they are interested additional sidewalk as part of this project.
2. Residents had general questions about assessments, including the process, costs,
and payment options.
a. The project team went over the assessment policy with the residents and
provided rough estimates on what to expect for costs.
b. Individual assessment amounts were not provided at the meeting, but they
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will be available at the next neighborhood meeting. The project team also
described the payment options for the assessments.
3. Residents also had some general questions about the construction process, service
replacements, schedule, and access during construction.
a. The project team went over some of the typical items that residents will
experience during construction and the expectations for vehicle access
during and after working hours.
b. Individual water and sewer service replacements were discussed, including
the potential for private work by the homeowner if they choose to replace
their entire service line or if it is required due to material that is not allowed
by plumbing code (lead water or orangeburg sewer).
c. The construction schedule was briefly discussed in terms of duration on
each block, but it was explained that the actual schedule and phasing of the
project won’t be determined until a Contractor is secured to complete the
work in Spring 2024.
A second neighborhood meeting has been scheduled for October 25, 2023 to review
preliminary special assessments and proposed improvements.
Residents within the reconstruction project area were also mailed questionnaires in May
2023 shown in Appendix D. The questionnaire focused on drainage issues, utilities,
pedestrian facilities, landscaping, and other concerns the residents may have. 42
questionnaires, which is roughly 25% of the affected properties, were returned with
comments. The most common questionnaire responses related to:
1. Specific drainage problems in the roadway and on the sidewalk
2. Desire for sidewalk improvements and additional sidewalks
3. Speeding and intersection safety
4. Overgrown and unhealthy trees throughout the neighborhood
5. Concerns about existing landscaping and trees in the boulevard
A summary of the responses to the resident questionnaire are provided in the Table below.
Table 5: Resident Questionnaire Response Summary
Yes No Total # of Responses
Drainage Issue 13 29 42
Sanitary Issue 19 23 42
Water Issue 8 34 42
Pedestrian Facility Issue 20 22 42
Irrigation 4 38 42
Invisible Fence 1 41 42
Tree Concerns 19 23 42
Landscaping Concerns 4 38 42
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VII. Estimated Costs
Estimated construction costs presented in this report include a 15 percent contingency factor.
Overhead costs, estimated at 20 percent, include legal, engineering, administrative and fiscal
costs. Final costs and assessments will be determined by using low-bid construction costs of the
proposed work.
Proposed construction costs for the 2024 Central Avenues Improvements (including curb and
gutter, bituminous street, pedestrian facilities, storm sewer, sanitary sewer, water main, and turf
restoration) are itemized in Appendix A and are summarized in Table 6 below.
These cost estimates are based upon public construction cost information. Because the consultant
has no control over the cost of labor, materials, competitive bidding process, weather conditions
and other factors affecting the cost of construction, all cost estimates are opinions for general
information of the client and no warranty or guarantee as to the accuracy of construction cost
estimates is made. It is recommended that costs for project financing should be based upon
actual, competitive bid prices with reasonable contingencies.
Table 6: Preliminary Estimated Cost of 2024 Proposed Improvements
Proposed Street Improvements $2,866,000
Proposed Sanitary Sewer Improvements $849,000
Proposed Watermain Improvements $1,113,000
Proposed Storm Sewer Improvements $867,000
Street & Utility Subtotal $5,695,000
Contingencies (15%) $855,000
Engineering & Administration (20%) $1,310,000
Total Estimated Project Costs $7,860 ,000
VIII. Special Assessments
Street improvements throughout the reconstruction project area (7th Ave N, 8th Ave N, and 3rd St
N) will be assessed to adjacent and benefitting properties according to the City of Hopkins’
assessment policy. Street improvement work includes pavement removals, grading, subgrade
correction, aggregate base, driveways, pavement construction, and restoration.
According to the City’s assessment policy, residential street improvement costs are assessed to
the benefitting properties. In summary, assessments to benefitting properties are determined
based on the following criteria:
• Properties are assessed based on 70% of the actual street improvement costs. This
is referred to as a “Street Assessment”.
• North/South Avenue improvements are typically assessed to properties with direct
frontage based on a front foot basis (length) along the Avenue.
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• East/West Street improvements are typically assessed to properties located within
one block north/south of the Street on a unit basis (per each property).
• “Street Assessments” to any individual property are capped at front foot rate
increase annually by 3% over the prior year’s amount. An assessment cap for
residential properties of $106.14 per front foot has been established by adding 3%
to the 2023 assessment cap according to City policy.
• The assessment cap is applied to residential properties in the project area and is not
applicable to commercial properties which will receive a benefit appraisal in
preparation of the assessment roll. For properties receiving a benefit appraisal (11
7th Ave N), the lesser of the ‘per policy’ calculation and the benefit amount per the
appraisal will be used. The benefit appraisal for 11 7th Ave N should be available
prior to the Public Improvement Hearing.
• Several properties in the project area were previously assessed during the 2012
Street & Utility Improvements project for the reconstruction of Minnetonka Mills Rd
and 3rd St N from 8th Ave N to 9th Ave N. These previous assessment amounts were
considered when calculating preliminary assessments for this project, and
properties that were assessed in 2012 will either be assessed at a lower amount or
will not be assessed for the 2024 project depending on what they were assessed for
in 2012 for the improvements to Minnetonka Mills Rd and 3rd St N. This same policy
was applied to several of the properties in the 2023 Street & Utility project because
they were adjacent to or part of the 2011 Street & Utility project and assessed in
2011 for improvements to those streets.
• Utility (sanitary sewer, storm sewer, water) main improvements are 100% paid by
the respective utility funds. No assessment for utility mains is proposed and their
costs do not contribute to either the “Street Assessments” or “Utility
Assessments”.
• Utility service lines are owned by the individual property per City Code. As a result,
the City assesses for the cost of the individual service line replacements. This is
referred to as a “Utility Assessment”. The City participates in a share of these costs
for residential properties because the replacement is mandatory where mains are
reconstructed, and therefore properties are assessed for only 50% of the cost of the
service replacement based on actual bid prices received. Commercial properties are
assessed for 100% of the cost of the service replacement.
• The estimated cost of the water service replacement from the main to property line
is $3,350. With the proposed 50/50 “Utility Assessment” split, $1,675 will be
assessed to each property where water services are replaced. The estimated cost of
the sewer service replacement from the main to the property line is $3,200. With
the proposed 50/50 “Utility Assessment” split, $1,600 will be assessed to each
property where sewer services are replaced. Thus, a property proposed to receive
both a new water service and sewer service would have a proposed “Utility
Assessment” of $3,275, which is an estimated amount until bids prices are known.
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In the case that sanitary sewer services are made of Orangeburg, or are in disrepair, replacement
or lining of the entire line will also be required from the property line to the house. On past
projects, the property owner has been given one year to address the necessary repairs and the
City will provide contact information for contractors that have performed this work within the
City.
A preliminary assessment roll is included in Appendix C of this report. Total estimated assessments
are $953,722.18 .
IX. Right-of-Way/Easements/Permits
The majority of the proposed improvements will be limited to the existing street ROW along all
corridors. Temporary construction easements may be needed for work outside the street ROW
such as driveway apron replacement, grading and turf restoration.
Permits will be required from the Minnesota Pollution Control Agency for grading (National
Pollutant Discharge Elimination System permit), Minnesota Department of Health for Water Main
Replacement, and the Nine Mile Creek Watershed District for Erosion Control.
X. Project Schedule
If this Preliminary Engineering Report is accepted by the City Council, the following schedule is
proposed:
Order Public Improvement Hearing ................................................................. October 3, 2023
Neighborhood Meeting 2 .............................................................................. October 25, 2023
Conduct Improvement Hearing, Order Final Plans & Specifications ............. November 6, 2023
Final Design .................................................................. November 7, 2023 – January 16, 2024
Present Final Plans / Authorize Ad for Bids ..................................................... January 16, 2024
Open Bids ...................................................................................................... February 9, 2024
Order Public Assessment Hearing................................................................. February 20, 2024
Neighborhood Meeting 3 ............................................................................ March 11-14, 2024
Conduct Assessment Hearing / Adopt Assessment Roll / Award Project ........... March 19 , 2024
Construction ............................................................................................ May – October 2024
XI. Feasibility and Recommendation
From an engineering standpoint, this project is feasible, cost effective, and necessary and can best
be accomplished by letting competitive bids for the work. It is recommended that the work be
done under one contract, for all project areas, to complete the work in an orderly and efficient
manner. The City, its financial consultant, and the persons assessed will have to determine the
economic feasibility of the proposed improvements.
Services Provided:
Civil and Municipal Engineering
Water and Wastewater Engineering
Traffic and Transportation Engineering
Aviation Planning and Engineering
Water Resources Engineering
Coatings Inspection Services
Landscape Architecture Services
Surveying and Mapping
Geographic Information System Services
Funding Assistance
www.bolton-menk.com
Appendix A: Preliminary Cost Estimates
PRELIMINARY ENGINEER'S ESTIMATE
2024 STREET & UTILITY IMPROVEMENTS
CITY OF HOPKINS, MN
BMI PROJECT NO. 0T1.130543
1 MOBILIZATION LUMP SUM $250,000.00 $25,000.00 $25,000.00 $12,500.00 $12,500.00 $12,500.00 $25,000.00 $12,500.00 $125,000.00 $50,000.00 $25,000.00 $50,000.00 1.00 $250,000.00
2 CLEARING TREE $500.00 $12,000.00 $16,000.00 $2,500.00 $3,000.00 $2,000.00 $35,500.00 71 $35,500.00
3 GRUBBING TREE $250.00 $6,000.00 $8,000.00 $1,250.00 $1,500.00 $1,000.00 $17,750.00 71 $17,750.00
4 DECIDUOUS TREE 2" CAL B&B EACH $600.00 $14,400.00 $19,200.00 $3,000.00 $3,600.00 $2,400.00 $42,600.00 71 $42,600.00
5 REMOVE SIGN POST EACH $50.00 $350.00 $700.00 $300.00 $1,350.00 27 $1,350.00
6 REMOVE SIGN PANEL EACH $50.00 $350.00 $700.00 $300.00 $1,350.00 27 $1,350.00
7 REMOVE CURB AND GUTTER LIN FT $8.00 $20,088.00 $36,592.00 $2,432.00 $4,992.00 $4,256.00 $19,392.00 $87,752.00 10969 $87,752.00
8 REMOVE BITUMINOUS DRIVEWAY PAVEMENT SQ YD $10.00 $70.00 $70.00 $1,410.00 $1,550.00 155 $1,550.00
9 REMOVE BITUMINOUS STREET PAVEMENT SQ YD $4.00 $17,216.00 $33,928.00 $12,732.00 $63,876.00 15969 $63,876.00
10 REMOVE CONCRETE WALK SQ FT $1.00 $41,455.00 $41,455.00 41455 $41,455.00
11 REMOVE CONCRETE STEP EACH $20.00 $1,720.00 $1,720.00 86 $1,720.00
12 REMOVE CONCRETE ALLEY/DRIVEWAY PAVEMENT SQ YD $12.00 $2,016.00 $1,092.00 $4,080.00 $7,188.00 599 $7,188.00
13 REMOVE CONCRETE LIGHT POLE FOUNDATION EACH $1,000.00 $1,000.00 $1,000.00 1 $1,000.00
14 SALVAGE LIGHT POLE EACH $750.00 $750.00 $750.00 1 $750.00
15 SALVAGE & REINSTALL PAVERS SQ FT $15.00 $1,590.00 $1,590.00 106 $1,590.00
16 SAWING CONCRETE PAVEMENT (FULL DEPTH)LIN FT $7.00 $1,820.00 $2,513.00 $630.00 $1,197.00 $6,160.00 880 $6,160.00
17 SAWING BITUMINOUS PAVEMENT (FULL DEPTH)LIN FT $6.00 $816.00 $852.00 $756.00 $510.00 $1,374.00 $906.00 $5,214.00 869 $5,214.00
18 SALVAGE & REINSTALL FENCE LIN FT $100.00 $4,000.00 $5,000.00 $7,000.00 $16,000.00 160 $16,000.00
19 REMOVE RETAINING WALL LIN FT $25.00 $11,875.00 $11,875.00 475 $11,875.00
20 SALVAGE & REINSTALL BLOCK RETAINING WALL LIN FT $150.00 $16,350.00 $75,450.00 $91,800.00 612 $91,800.00
21 REMOVE HYDRANT EACH $750.00 $6,000.00 8 $6,000.00
22 REMOVE WATERMAIN LIN FT $12.00 $43,056.00 3588 $43,056.00
23 REMOVE DRAINAGE STRUCTURE (STORM)EACH $600.00 $27,000.00 45 $27,000.00
24 REMOVE STORM SEWER PIPE LIN FT $15.00 $18,105.00 1207 $18,105.00
25 REMOVE SANITARY SEWER PIPE LIN FT $10.00 $29,970.00 2997 $29,970.00
26 REMOVE SANITARY MANHOLE EACH $750.00 $10,500.00 14 $10,500.00
27 EXPLORATORY EXCAVATION HOUR $1,000.00 $20,000.00 $20,000.00 $40,000.00 40 $40,000.00
28 COMMON EXCAVATION CU YD $30.00 $94,140.00 $182,220.00 $67,740.00 $344,100.00 11470 $344,100.00
29 SUBGRADE EXCAVATION CU YD $35.00 $5,495.00 $10,640.00 $2,695.00 $3,955.00 $22,785.00 651 $22,785.00
30 RECLAIM BITUMINOUS SURFACE (IN PLACE)SQ YD $3.00 $6,936.00 $6,936.00 2312 $6,936.00
31 SUBGRADE PREPARATION SQ YD $2.00 $4,624.00 $4,624.00 2312 $4,624.00
32 GEOTEXTILE FABRIC TYPE V SQ YD $2.00 $7,744.00 $15,192.00 $5,904.00 $28,840.00 14420 $28,840.00
33 STABILIZING AGGREGATE CU YD $50.00 $7,850.00 $15,200.00 $5,650.00 $28,700.00 574 $28,700.00
34 SELECT GRANULAR BORROW TON $20.00 $47,060.00 $92,300.00 $35,880.00 $175,240.00 8762 $175,240.00
35 CLASS 5 AGGREGATE BASE TON $24.00 $37,824.00 $74,208.00 $3,360.00 $28,848.00 $144,240.00 6010 $144,240.00
36 CLASS 2 AGGREGATE SURFACING (GRAVEL DRIVEWAY)TON $40.00 $400.00 $400.00 10 $400.00
37 BITUMINOUS WEARING COURSE (SPWEA240C)TON $92.00 $43,148.00 $84,640.00 $25,668.00 $28,612.00 $36,708.00 $32,936.00 $251,712.00 2736 $251,712.00
38 BITUMINOUS -NON-WEARING COURSE (SPNWB230C)TON $88.00 $41,272.00 $80,960.00 $36,872.00 $31,504.00 $190,608.00 2166 $190,608.00
39 BITUMINOUS MATERIAL FOR TACK COAT GAL $7.50 $1,597.50 $3,135.00 $960.00 $1,695.00 $2,175.00 $1,222.50 $10,785.00 1438 $10,785.00
40 2" BITUMINOUS STREET PATCH SQ YD $35.00 $22,435.00 $28,840.00 $51,275.00 1465 $51,275.00
41 MILL BITUMINOUS SURFACE (2")SQ YD $3.00 $7,692.00 $9,882.00 $17,574.00 5858 $17,574.00
42 3" BITUMINOUS DRIVEWAY SQ YD $40.00 $400.00 $1,720.00 $2,120.00 53 $2,120.00
43 JOINT ADHESIVE (MASTIC)LIN FT $1.00 $2,500.00 $4,275.00 $1,194.00 $1,674.00 $1,823.00 $1,855.00 $13,321.00 13321 $13,321.00
44 MODULAR BLOCK RETAINING WALL SQ FT $50.00 $66,700.00 $66,700.00 1334 $66,700.00
45 POURED CONCRETE RETAINING WALL SQ FT $50.00 $20,400.00 $20,400.00 408 $20,400.00
46 6" PERF PVC UNDERDRAIN LIN FT $25.00 $67,500.00 2700 $67,500.00
47 6" PERF PVC UNDERDRAIN CLEANOUT EACH $400.00 $11,200.00 28 $11,200.00
48 15" RC STORM PIPE LIN FT $80.00 $129,680.00 1621 $129,680.00
49 18" RC STORM PIPE LIN FT $95.00 $12,730.00 134 $12,730.00
50 27" RC STORM PIPE LIN FT $120.00 $7,560.00 63 $7,560.00
51 36" RC STORM PIPE LIN FT $150.00 $21,600.00 144 $21,600.00
52 STORM MANHOLE (48-4020)EACH $4,500.00 $18,000.00 4 $18,000.00
53 STORM MANHOLE (60-4020)EACH $5,500.00 $22,000.00 4 $22,000.00
54 STORM MANHOLE CATCH BASIN (48-4022)EACH $4,500.00 $99,000.00 22 $99,000.00
55 STORM MANHOLE CATCH BASIN (72-4022)EACH $8,000.00 $8,000.00 1 $8,000.00
56 STORM CATCH BASIN EACH $2,500.00 $62,500.00 25 $62,500.00
57 INSTALL CASTING (R-3067)(STORM)EACH $1,200.00 $56,400.00 47 $56,400.00
58 INSTALL CASTING (R-3067-C)(STORM)EACH $1,200.00 $8,400.00 7 $8,400.00
59 INSTALL CASTING (R-1733)(STORM)EACH $1,200.00 $15,600.00 13 $15,600.00
60 INSTALL CASTING (R-1733 - SLOTTED GRATE)(STORM)EACH $1,200.00 $1,200.00 1 $1,200.00
61 ADJUST FRAME & RING CASTINGS (STORM)EACH $800.00 $4,800.00 6 $4,800.00
ITEM NO.ITEM UNIT UNIT PRICE 3RD ST WALK STREET TOTAL3RD ST N EXISTING WALK TOTAL COST
ESTIMATED COSTS TOTAL
QUANTITYWATERSTORM7TH AVE N 6TH AVE N8TH AVE N SANITARY1ST ST N 2ND ST N
9/11/2023 Page 1 of 2
PRELIMINARY ENGINEER'S ESTIMATE
2024 STREET & UTILITY IMPROVEMENTS
CITY OF HOPKINS, MN
BMI PROJECT NO. 0T1.130543
ITEM NO.ITEM UNIT UNIT PRICE 3RD ST WALK STREET TOTAL3RD ST N EXISTING WALK TOTAL COST
ESTIMATED COSTS TOTAL
QUANTITYWATERSTORM7TH AVE N 6TH AVE N8TH AVE N SANITARY1ST ST N 2ND ST N
62 CONNECT TO EXISTING STORM PIPE EACH $1,200.00 $9,600.00 8 $9,600.00
63 CONNECT TO EXISTING STORM STRUCTURE EACH $1,500.00 $16,500.00 11 $16,500.00
64 8" PVC SDR 35 SANITARY SEWER PIPE LIN FT $70.00 $210,630.00 3009 $210,630.00
65 COARSE AGGREGATE BEDDING (TYPE B)LIN FT $15.00 $4,500.00 300 $4,500.00
66 8" CIPP LINING (CITY WIDE LINING)LIN FT $60.00 $60,000.00 1000 $60,000.00
67 SEAL SANITARY MANHOLE EACH $2,500.00 $15,000.00 6 $15,000.00
68 6" PVC SDR 26 SANITARY SEWER SERVICE PIPE LIN FT $50.00 $166,550.00 3331 $166,550.00
69 8" X 6" SDR 26 PVC SERVICE WYE EACH $1,000.00 $101,000.00 101 $101,000.00
70 INSTALL CASTING (R-1733)(SANITARY)EACH $1,500.00 $27,000.00 18 $27,000.00
71 SANITARY MANHOLE LIN FT $600.00 $70,800.00 118 $70,800.00
72 RECONNECT SANITARY SEWER SERVICE EACH $700.00 $70,700.00 101 $70,700.00
73 SANITARY SERVICE REPAIR EACH $1,200.00 $13,200.00 11 $13,200.00
74 CONNECT TO EXISTING SANITARY SEWER PIPE EACH $1,500.00 $7,500.00 5 $7,500.00
75 CONNECT TO EXISTING SANITARY MANHOLE EACH $2,000.00 $2,000.00 1 $2,000.00
76 HYDRANT EACH $7,500.00 $67,500.00 9 $67,500.00
77 DUCTILE IRON FITTINGS POUND $15.00 $26,430.00 1762 $26,430.00
78 6" GATE VALVE & BOX EACH $2,500.00 $22,500.00 9 $22,500.00
79 8" GATE VALVE & BOX EACH $3,500.00 $70,000.00 20 $70,000.00
80 6" DIP WATERMAIN LIN FT $75.00 $7,950.00 106 $7,950.00
81 8" DIP WATERMAIN LIN FT $85.00 $296,905.00 3493 $296,905.00
82 1" TYPE K COPPER SERVICE PIPE LIN FT $50.00 $184,200.00 3684 $184,200.00
83 1" CURB STOP & BOX EACH $750.00 $84,000.00 112 $84,000.00
84 1" CORPORATION STOP EACH $500.00 $56,000.00 112 $56,000.00
85 GROUNDING ANODE EACH $250.00 $30,000.00 120 $30,000.00
86 TRACER WIRE ACCESS BOX (NON ROADWAY)EACH $150.00 $16,800.00 112 $16,800.00
87 TRACER WIRE TEST STATION (HYDRANT)EACH $300.00 $2,700.00 9 $2,700.00
88 RECONNECT WATER SERVICE EACH $600.00 $67,200.00 112 $67,200.00
89 CONNECT TO EXISTING WATERMAIN EACH $2,000.00 $16,000.00 8 $16,000.00
90 TEMPORARY WATER SERVICE EACH $500.00 $56,000.00 112 $56,000.00
91 4" CONCRETE WALK SQ FT $8.00 $361,344.00 $7,920.00 $369,264.00 46158 $369,264.00
92 CONCRETE STEP EACH $500.00 $43,000.00 $43,000.00 86 $43,000.00
93 CONCRETE CURB & GUTTER DESIGN B618 LIN FT $20.00 $219,380.00 10969 $219,380.00
94 6" CONCRETE WALKS (PED RAMPS)SQ YD $120.00 $45,000.00 $7,200.00 $52,200.00 435 $52,200.00
95 6" CONCRETE DRIVEWAY SQ YD $75.00 $13,275.00 $9,300.00 $17,700.00 $40,275.00 537 $40,275.00
96 8" CONCRETE DRIVEWAY/ALLEY SQ YD $85.00 $16,575.00 $16,575.00 195 $16,575.00
97 TRUNCATED DOMES SQ FT $70.00 $29,120.00 $10,640.00 $39,760.00 568 $39,760.00
98 TRAFFIC CONTROL LUMP SUM $50,000.00 $5,000.00 $5,000.00 $2,500.00 $2,500.00 $2,500.00 $5,000.00 $2,500.00 $25,000.00 $10,000.00 $5,000.00 $10,000.00 1.00 $50,000.00
99 SIGN POST EACH $400.00 $2,800.00 $5,600.00 $2,400.00 $10,800.00 27 $10,800.00
100 SIGN PANELS EACH $300.00 $2,100.00 $4,200.00 $1,800.00 $8,100.00 27 $8,100.00
101 LIGHT POLE FOUNDATION EACH $1,500.00 $1,500.00 $1,500.00 1 $1,500.00
102 INSTALL LIGHT POLE EACH $1,500.00 $1,500.00 $1,500.00 1 $1,500.00
103 LED LUMINAIRE FIXTURE EACH $1,500.00 $1,500.00 $1,500.00 1 $1,500.00
104 STREET SWEEPER WITH OPERATOR HOUR $175.00 $4,375.00 $4,375.00 $875.00 $875.00 $875.00 $875.00 $12,250.00 70 $12,250.00
105 STABILIZED CONSTRUCTION EXIT EACH $2,000.00 $8,000.00 $14,000.00 $8,000.00 $8,000.00 $38,000.00 19 $38,000.00
106 STORM DRAIN INLET PROTECTION EACH $250.00 $7,750.00 $13,000.00 $7,750.00 $750.00 $500.00 $500.00 $30,250.00 121 $30,250.00
107 TOPSOIL BORROW (SPECIAL)CU YD $40.00 $6,400.00 $10,760.00 $5,400.00 $1,200.00 $1,320.00 $10,280.00 $35,360.00 884 $35,360.00
108 HYDROSEEDING SQ YD $3.00 $954.00 $807.00 $888.00 $2,649.00 883 $2,649.00
109 SODDING, TYPE LAWN SQ YD $10.00 $13,940.00 $24,410.00 $23,360.00 $61,710.00 6171 $61,710.00
110 FABRICATED RAILING LIN FT $100.00 $3,600.00 $10,000.00 $13,600.00 136 $13,600.00
111 LANDSCAPE ALLOWANCE LUMP SUM $50,000.00 $20,000.00 $20,000.00 $2,500.00 $2,500.00 $2,500.00 $2,500.00 $50,000.00 1 $50,000.00
112 CROSSWALK SPECIAL - STAMPED BITUMINOUS SQ FT $50.00 $14,600.00 $14,600.00 292 $14,600.00
113 4" SOLID WHITE STRIPING - THERMOPLASTIC LIN FT $1.00 $1,665.00 $1,665.00 1665 $1,665.00
114 24" SOLID WHITE STOP BAR - THERMOPLASTIC LIN FT $60.00 $1,080.00 $1,080.00 18 $1,080.00
115 CROSSWALK WHITE - THERMOPLASTIC SQ FT $15.00 $5,670.00 $5,400.00 $1,350.00 $1,350.00 $13,770.00 918 $13,770.00
532,026.50$1,041,397.00$138,756.00$91,757.00$107,491.00$380,021.50$536,639.00$38,160.00$2,866,248.00$849,350.00$866,755.00$1,113,241.00$$5,695,594.00
79,803.98$156,209.55$20,813.40$13,763.55$16,123.65$57,003.23$80,495.85$5,724.00$429,937.20$127,402.50$130,013.25$166,986.15$854,339.10$
122,366.10$239,521.31$31,913.88$21,104.11$24,722.93$87,404.95$123,426.97$8,776.80$659,237.04$195,350.50$199,353.65$256,045.43$1,309,986.62$
734,196.57$1,437,127.86$191,483.28$126,624.66$148,337.58$524,429.67$740,561.82$52,660.80$3,955,422.24$1,172,103.00$1,196,121.90$1,536,272.58$7,859,919.72$TOTAL ESTIMATED PROJECT COST
CONTINGENCIES (15%)
ENGINEERING AND ADMINISTRATION (20%)
SUBTOTAL
9/11/2023 Page 2 of 2
Appendix B: Figures
R
FEETSCALE
0 500 1000
HORZ.
LEGEND
RECONSTRUCTION AREA
Figure 1: Project Location Map
H:\HOPK\0T1130543\CAD\C3D\FEASIBILTY\130543_FIG_INDEX_MAP.dwg 8/24/2023 7:27:18 PMR
2024 Central Avenues Improvements
City of Hopkins, Minnesota
MAINSTREET
1ST ST N
2ND ST N
3RD ST N
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5TH AVE N6TH AVE N7TH AVE N8TH AVE NREHABILITATION AREA