23-110 (12-19) Accepting Feasibility Study and Ordering Construction of Certain Proposed Public Improvements on Project No. 24-01 - 2024 Pavement Management ProgramDocuSign Envelope ID: F4971979-C4F4-4EE2-AF69-75538AE08578
RESOLUTION NO. 23-110
A RESOLUTION ACCEPTING FEASIBILITY STUDY AND ORDERING
CONSTRUCTION OF CERTAIN PROPOSED PUBLIC IMPROVEMENTS ON
PROJECT NO. 24-01: 2024 PAVEMENT MANAGEMENT PROGRAM
WHEREAS, pursuant to Resolution of the City Council No. 22-085 adopted
October 6, 2022 a report has been prepared by Short Elliott Hendrickson, Inc. (the
"Feasibility Study") with reference to proposed Improvement No. 24-01, the improvement
of the following streets:
All properties in the SE '/4 of the NE '/4 of Section 30, Township 118 North, Range 21
West; within the City of Golden Valley, Hennepin County, Minnesota, which are
adjacent to the following streets:
• Duluth Street: Wisconsin Avenue North to Winnetka Avenue North
• Westbend Road: Wisconsin Avenue North to Valders Avenue North
• Winnetka Heights Drive: Orkla Drive to Valders Avenue North
• Wisconsin Avenue North: Duluth Street to Westbend Road
• Wisconsin Avenue North: Westbend Road to 23rd Avenue North
• Orkla Drive: Westbend Road to 23rd Avenue North
• Valders Avenue North: Duluth Street to Winnetka Heights Drive
• Valders Avenue North: Winnetka Heights Drive to 23rd Avenue North
• Valders Court (mill and overlay): Valders Avenue North to east cul-de-sac
Properties in the SW'/4 of the NE'/4 of Section 30, Township 118 North, Range 21
West; within the City of Golden Valley, Hennepin County, Minnesota, which are
adjacent to the following streets:
• Wisconsin Avenue North: Duluth Street to Westbend Road
Properties in the NE'/4 of the SE'/4 of Section 30, Township 118 North, Range 21 West;
within the City of Golden Valley, Hennepin County, Minnesota, which are adjacent to the
following streets:
• Duluth Street: Wisconsin Avenue North to Winnetka Avenue North
by improving said streets; and
WHEREAS, the Feasibility Study 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; and
DocuSign Envelope ID: F4971979-C4F4-4EE2-AF69-75538AE08578
WHEREAS, a public hearing was held on Improvement No. 24-01 on this day
December 19, 2023 at 6:30 pm at Golden Valley City Hall, ten days' mailed notice and
two weeks' published notice of the hearing was given, and all persons desiring to be heard
were given an opportunity to be heard thereon.
NOW THEREFORE, BE IT RESOLVED, BY THE CITY COUNCIL OF THE CITY
OF GOLDEN VALLEY, MINNESOTA that this Council approves as follows:
1. The Feasibility Study is hereby approved.
2. Such improvement is necessary, cost-effective, and feasible as detailed in the
feasibility report.
3. Such improvement is hereby ordered.
4. The City Engineer is hereby designated as the engineer for this improvement. The
engineer has prepared plans and specifications for the making of such
improvement.
5. The City Clerk shall prepare an Advertisement for Bids and cause to be inserted
in the official paper an advertisement for bids upon the making of such
improvement under such approved plans and specifications. The advertisement
shall be published for 14 days, shall specify the work to be done, shall state that
bids will be received by the clerk until 10 am on January 30, 2024, at which time
they will be publicly opened in the city council chambers of the city hall by the city
engineer, will then be tabulated, and will be considered by the council on March 5,
2024. Any bidder whose responsibility is questioned during consideration of the
bid will be given an opportunity to address the council on the issue of responsibility.
No bids will be considered unless sealed and filed with the clerk and accompanied
by a cash deposit, cashier's check, bid bond or certified check payable to the City
of Golden Valley for 5% percent of the amount of such bid.
6. The council will consider the assessment of abutting properties for at least 20% of
the cost of the improvement pursuant to Minnesota Statutes, Chapter 429 at an
estimated total cost of the improvement of $9,000,000.
Passed by the City Council of the City of Golden Valley, Minnesota this 19th day of
December, 2023.
DocuSigned by:
Shep.ar Harris, Mayor
Attested:
FT4DocuSigned by:
,
a
Theresa Sc yma, City Clerk
DocuSign Envelope ID: F4971979-C4F4-4EE2-AF69-75538AE08578
C I P Streets
2024 (23-01)
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DocuSign Envelope ID: F4971979-C4F4-4EE2-AF69-75538AE08578
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Building a Better World
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Engineers I Architects I Planners I Scientists
DocuSign Envelope ID: F4971979-C4F4-4EE2-AF69-75538AE08578
Feasibility Report
2024 Pavement Management Program
City of Golden Valley, Minnesota
City No. 24-01
SEH No. GOLDV 170054
December 8, 2023
hereby certify that this 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.
W.A
Stephen R. Prall, PE
Date: December 8, 2023 License No.: 54949
Reviewed By: Scott D. Haupt, PE Date: December 8, 2023
Short Elliott Hendrickson Inc.
3535 Vadnais Center Drive
St. Paul, MN 55110-3507
651.490.2000
SEH
DocuSign Envelope ID: F4971979-C4F4-4EE2-AF69-75538AE08578
TABLE OF CONTENTS
Page
INTRODUCTION.............................................................................................................1
PROJECT LEGAL DESCRIPTION.................................................................................1
EXISTING CONDITIONS................................................................................................2
SanitarySewer..........................................................................................................................2
Inflowand Infiltration.............................................................................................................................................2
SewerMains.........................................................................................................................................................2
SanitarySewer Services......................................................................................................................................3
WaterMain................................................................................................................................3
StormwaterDrainage................................................................................................................3
Streets....................................................................................................................................... 5
ExistingStreet Widths..........................................................................................................................................5
PavementSections...............................................................................................................................................5
SubgradeConditions............................................................................................................................................6
ConcreteCurb and Gutter....................................................................................................................................6
PedestrianFacilities.............................................................................................................................................6
PROPOSED IMPROVEMENTS......................................................................................7
PublicParticipation...................................................................................................................7
Sanitary Sewer and Water Main...............................................................................................7
SanitarySewer Rehabilitation..............................................................................................................................7
Sanitary Sewer Service Rehabilitation..................................................................................................................8
WaterMain Rehabilitation....................................................................................................................................8
Stormwater Management..........................................................................................................9
Additional Water Quality Measures....................................................................................................................11
Streets.....................................................................................................................................11
StreetWidths......................................................................................................................................................11
SubgradeCorrections.........................................................................................................................................12
ConcreteCurb and Gutter..................................................................................................................................12
Intersection and Curve Improvements................................................................................................................12
PedestrianFacilities...........................................................................................................................................12
StreetLighting....................................................................................................................................................13
Tree and Landscape Impacts.............................................................................................................................13
Driveway Reconstruction Program.....................................................................................................................13
ESTIMATED COSTS AND PROJECT FINANCING.....................................................14
EstimatedProject Costs..........................................................................................................14
Sewerand Water Costs......................................................................................................................................14
StormDrainage Costs........................................................................................................................................14
Street Reconstruction Costs...............................................................................................................................14
Duluth Street Sidewalk Costs.............................................................................................................................14
TotalProject Costs.............................................................................................................................................15
Proposed Project Financing....................................................................................................15
SpecialAssessments.........................................................................................................................................15
Sewer and Water Reserve Fund........................................................................................................................16
StormSewer Improvement Fund........................................................................................................................16
StreetImprovement Funds.................................................................................................................................16
Duluth Street Sidewalk Improvement Funds......................................................................................................16
FinancingSummary............................................................................................................................................16
SUMMARY AND RECOMMENDATIONS.....................................................................17
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LIST OF EXHIBITS
Exhibit 1
Project Location Map
Exhibit 2A — 2F
Proposed Project Layouts
Exhibit 3
Existing Street Widths
Exhibit 4
Proposed Street Widths
Exhibit 5
Subcut Depths and Soil Boring Locations
Exhibit 6
Pedestrian Routes
Exhibit 7
Sanitary Sewer Defects
Exhibit 8
Watermain Breaks
APPENDIX A
Summary of Property Owner Comments
APPENDIX B
Preliminary Assessment Roll
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INTRODUCTION
At the October 6, 2022 Council Meeting, the Golden Valley City Council authorized
preparation of a feasibility report for the rehabilitation of streets for the 2024 Pavement
Management Program (PMP). The proposed project includes reconstruction of
approximately 1.17 miles and mill and overlay of 0.06 miles of residential streets located
in the northwest corner of the City.
Streets in the 2024 PMP area are bounded by Wisconsin Avenue North on the west,
Winnetka Avenue North (County State Aid Highway (CSAH) 156) on the east,
23rd Avenue North on the north, and Duluth Street on the south. The proposed streets
are shown on Exhibit 1: Project Location Map.
This feasibility report will discuss the existing conditions of the streets, sanitary sewer,
water main, and storm sewer within the project area. In addition, the report will discuss
the proposed project design, estimated project costs, and the proposed financing,
including a preliminary special assessment roll.
PROJECT LEGAL DESCRIPTION
The proposed project includes:
All properties in the SE ' 4 of the NE ' 4 of Section 30, Township 118 North, Range 21
West; within the City of Golden Valley, Hennepin County, Minnesota, which are
adjacent to the following streets:
• Duluth Street: Wisconsin Avenue North to Winnetka Avenue North
• Westbend Road: Wisconsin Avenue North to Valders Avenue North
• Winnetka Heights Drive: Orkla Drive to Valders Avenue North
• Wisconsin Avenue North: Duluth Street to Westbend Road
• Wisconsin Avenue North: Westbend Road to 23rd Avenue North
• Orkla Drive: Westbend Road to 23rd Avenue North
• Valders Avenue North: Duluth Street to Winnetka Heights Drive
• Valders Avenue North: Winnetka Heights Drive to 23rd Avenue North
• Valders Court (mill and overlay): Valders Avenue North to east cul-de-sac
Properties in the SW ' 4 of the NE ' 4 of Section 30, Township 118 North, Range 21
West; within the City of Golden Valley, Hennepin County, Minnesota, which are
adjacent to the following streets:
• Wisconsin Avenue North: Duluth Street to Westbend Road
Properties in the NE % of the SE % of Section 30, Township 118 North, Range 21 West;
within the City of Golden Valley, Hennepin County, Minnesota, which are adjacent to the
following streets:
• Duluth Street: Wisconsin Avenue North to Winnetka Avenue North
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EXISTING CONDITIONS
Sanitary Sewer
Inflow and Infiltration
The Metropolitan Council Environmental Services (MCES) provides wastewater
treatment and interceptor collection services for the Twin Cities metropolitan
area. The MCES has undertaken a major effort to eliminate excess peak flows in
its system that exceeds the capacity of the collection and treatment facilities.
These excess flows can and do result in overflows of raw sewage into the
Mississippi River.
Inflow and Infiltration (1/1) is defined as clear water that is either directly
discharged (inflow) or indirectly discharged (infiltration) into the sanitary sewer
system. Among the most common sources are improperly connected sump
pumps or foundation drains discharging into the sanitary sewer and the infiltration
of ground water through defects in sanitary sewer mains, services, and
manholes.
The City of Golden Valley is one of many cities within the MCES sanitary sewer
district that have been notified of excess peak sanitary sewer flows being
generated by their community. An Inflow and Infiltration (1/1) mitigation program
has been implemented to take steps towards decreasing the peak flows
associated with clear water entering the sanitary sewer and contributing to these
excess peak flows.
The peak flows in Golden Valley typically follow heavy rainfall events, indicating
that improper connections to the sewer system may be present, and that sewers
may be allowing ground water and surface water into the system through cracked
pipes, leaking manholes, and substandard castings.
The proposed project area is located within the portion of the City that has an
excessive volume of inflow and infiltration following rainfall events and high
groundwater conditions.
Sewer Mains
The existing sanitary sewer system within the project area is comprised of local
lateral sewers and trunk sewer main that were mostly constructed in the late
1950's when sanitary sewer was first available in the City. The sanitary sewer
mains are mostly constructed with nine -inch diameter clay pipes in the project
area, except for the northernmost 270 linear foot segment on Orkla Drive and the
southernmost 110 linear foot segment on Valders Avenue, which are comprised
of eight -inch cast iron pipe (CIP).
The existing sanitary sewer system on Valders Court was constructed when the
road was constructed in the early 2000's and is comprised of eight -inch PVC
pipe.
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A Closed Circuit Television (CCTV) inspection was performed on all the City's
sanitary sewer mains within the project area as part of the preliminary project
design. This inspection was intended to locate the extent and severity of the
defects to the sanitary sewer system to determine if repairs are needed as part of
the street reconstruction project. The television inspection has identified
distresses within the City system that are consistent with the age and pipe
material. These defects include mineral deposits, cracked pipes, root intrusion,
noticeable infiltration, and offset joints. These defects are typical sources of
groundwater infiltration into the sewer system.
The extent of these defects is typical compared to the defects encountered in
previous residential street reconstruction projects containing clay pipes. Based
upon these CCTV results, the sanitary sewer mains throughout the entire project
area will require structural lining and replacement as discussed in the "Proposed
Improvements" section of this report.
The existing sanitary sewer defects are illustrated on Exhibit 7.
Sanitary Sewer Services
As part of its 1/1 Reduction Program, the City is offering the property owners
within this project area an opportunity to have a CCTV inspection performed on
the sanitary sewer service to their home. Property owners on the 2024 PMP will
not be charged for this voluntary inspection during the project, which is identical
to the Point of Sale Inspections required by City Code. The intent of this
inspection is to identify 1/1 issues present in the private sanitary sewer services
and allow property owners to make informed decisions regarding rehabilitation of
the service lines, including voluntary participation in the repair program offered as
part of the PMP project. This sewer service repair program will be discussed in
more detail later in this report.
Water Main
The majority of the existing water main system within the project area consists of lateral
mains that were installed during the early 1960's. The water main on Valders Court was
installed in the early 2000's when the road was constructed. All existing mains in the
project area are six-inch diameter cast iron pipe (CIP), except for Valders Court which
has six-inch ductile iron pipe (DIP). These mains are located within the existing City
owned street rights -of -way.
A review of water main maintenance records within the project area indicates a history
of water main breaks and maintenance issues consistent with other water mains of the
same age and material. Refer to Exhibit 8: Watermain Breaks for a map showing the
location of historical breaks in the project area. In addition, leaky, inoperable gate
valves have been discovered throughout the project area.
Stormwater Drainage
The entire 2024 PMP project area is part of the Bassett Creek Watershed, which is
contained within the Bassett Creek Main Stem (Upstream) subwatershed.
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Catch basins at the intersection of Duluth Street and Valders Avenue North collect
stormwater from contributing drainage along Valders Avenue (south of Duluth Street)
and Duluth Street (east of Valders Avenue). Stormwater flows in concrete pipes to a
storm trunk line running north on Valders Avenue North towards Westbend Road.
Catch basins at the intersection of Westbend Road and Valders Avenue North collect
stormwater from contributing drainage along Valders Avenue North (between Duluth
Street and Winnetka Heights Drive). Stormwater flows in concrete pipes to a storm trunk
line running west on Westbend Road towards Orkla Drive.
Catch basins at the intersection of Westbend Road and Orkla Drive collect stormwater
from contributing drainage along Winnetka Heights Drive, Orkla Drive, and Westbend
Road (east of Orkla Drive). Stormwater flows in concrete pipes to a storm trunk line
running west on Westbend Road towards Wisconsin Avenue North.
Catch basins at the intersection of Westbend Road and Wisconsin Avenue North (north
leg) collect stormwater from contributing drainage along Wisconsin Avenue North (north
of Westbend Road) and Westbend Road (between Wisconsin Avenue North and Orkla
Drive). Stormwater flows in concrete pipes to a storm trunk line running west on
Westbend Road towards Wisconsin Avenue North (south leg).
Catch basins at the intersection of Westbend Road and Wisconsin Avenue North (south
leg) collect stormwater from contributing drainage along Westbend Road (between
Wisconsin Avenue North and Xylon Avenue North). Stormwater flows in concrete pipes
to a storm trunk line running south on Wisconsin Avenue North towards Duluth Street.
Catch basins at the intersection of Duluth Street and Wisconsin Avenue North collect
stormwater from contributing drainage along Wisconsin Avenue North and Duluth Street
(between Wisconsin Avenue North and Valders Avenue North). Stormwater flows in
concrete pipes to a storm trunk line running south on Wisconsin Avenue North that
continues beyond the project area.
Catch basins at the intersections of Wisconsin Avenue North/23rd Avenue North, Orkla
Drive/23rd Avenue North, and Valders Avenue North/23rd Avenue North collect
stormwater from contributing drainage along the northern portions of Wisconsin Avenue
North, Orkla Drive, and Valders Avenue North. Stormwater flows in concrete pipes to a
storm trunk line running east on 23rd Avenue North towards Winnetka Avenue North.
Catch basins along Valders Court collect stormwater from contributing drainage along
Valders Court. Stormwater flows in concrete pipes north to a stormwater pond located
between Valders Court and 23rd Avenue North. The outlet of the stormwater pond
connects to a storm trunk line running along Winnetka Avenue North.
The discharge point of all trunk storm sewer systems conveying discharge from the
project site is ultimately the main stem of Bassett Creek.
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Streets
The streets within the proposed project area are mostly local bituminous streets that
were originally constructed as development occurred. Duluth Street and Wisconsin
Avenue North (between Duluth Street and Westbend Road) are constructed of
concrete. The original dates of construction throughout the project area generally
occurred throughout the 1950's and 1960's.
Existing Street Widths
Typical widths for most streets in the project area are 29 feet. The existing street
width on Duluth Street is 44 feet. Street widths are typically measured from face
of curb to face of curb. If no curb exists, street widths are measured from edge
of pavement to edge of pavement.
Street widths can vary depending upon the location on any given roadway. Refer
to Exhibit 3: Existing Street Widths for the typical street width for each street in
the project area.
Pavement Sections
All the streets within the proposed project area have existing bituminous or
concrete pavement over a gravel base. Soil boring locations are shown on
Exhibit 5: Proposed Subcut Depths and Soil Boring Locations, and the chart
below shows the existing and variable pavement and gravel depths at the boring
locations.
Bituminous
Concrete
Apparent
Pavement
Pavement
Gravel Depth
Soil Boring #
Location
Depth (inches)
Depth (inches)
(inches)
401
Duluth Street
-
7
17
402
Duluth Street
-
7
4
403
Duluth Street
-
8
3
404
Wisconsin Avenue North
-
5
10
405
Westbend Road
4.5
-
5.5
406
Westbend Road
3.5
-
0
407
Wisconsin Avenue North
4
-
4
408
Okrla Drive
5.5
-
8.75
409
Valders Avenue North
5
-
1
410
Winnetka Heights Drive
4
-
6.5
411
Wisconsin Avenue North
3.25
-
7.5
412
Orkla Drive
2
-
12
413
Valders Avenue North
4
-
11
As part of the preliminary design for the proposed project, a series of thirteen soil
borings were taken to determine the suitability of the existing subgrade materials
for street construction. These soil borings were also the source of the pavement
and gravel thickness information provided above. Refer to Exhibit 5: Proposed
Subcut Depths and Soil Boring Locations for locations of soil borings.
Properly constructed streets are built with a base course of fill beneath the
pavement usually made up of granular (gravel) material. This base course layer
is considered to be part of the pavement section. Not all soil borings taken in this
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project area encountered a base course layer. When encountered, some of the
soil boring locations lacked the base course thickness that is required to meet
today's requirements for pavement base.
The pavement distresses present within the project area are consistent with the
age of the streets. Common pavement distresses include longitudinal and
transverse cracking, durability cracking, spalling, settlement, pumping, alligator
cracking, edge cracking, and patching. Patching is frequently used to cover
severe distresses such as alligator cracking or durability cracking and is therefore
indicative of poor pavement quality.
Sub -grade Conditions
The soil borings indicate that the subgrade soils (soils beneath the base course
or subbase) in the project area are fill soils overlying glacial till soils typically
classified as clayey sand.
Concrete Curb and Gutter
The project area contains areas of existing concrete curb and gutter and rolled
bituminous curb. The bituminous curb was typically constructed by placing extra
asphalt off the edge of the paver when the streets were originally built.
Pedestrian Facilities
Pedestrian facilities within the project limits are existing concrete sidewalk along
the east and west side of Winnetka Avenue North and concrete sidewalk along
the north side of Duluth Street west of the Wisconsin Avenue North, installed in
the 2022 PMP.
Refer to Exhibit 6: Pedestrian Routes for locations of existing pedestrian facilities
within the project area.
Street Lighting
No City -owned street lighting facilities exist within the project area. Xcel Energy -
owned wooden poles with cobra -head light fixtures are present at the following
intersections: southwest quadrant of Duluth Street/Wisconsin Avenue, northwest
quadrant of Duluth Street/Valders Avenue, northeast quadrant of Duluth
Street/Winnetka Avenue, north side of Westbend Road at Wisconsin Avenue,
northeast corner of Valders Avenue/Winnetka Heights Drive, and the northwest
quadrant of Valders Avenue/Westbend Road.
0
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PROPOSEDIMPROVEMENTS
This portion of the feasibility report will focus on the proposed design of the project.
The estimated project costs and project financing will be discussed later in this report.
Public Participation
As part of the public engagement process for the 2024 Pavement Management
Program, two project open houses were held. The first open house was held in
May 2023 and the second was held in October 2023.
The open houses provided property owners with project information and a forum
to express concerns and ask questions regarding the proposed project. Property
owners were able to view the preliminary project design, including anticipated
impacts to landscaping, trees, and driveways. Information regarding the
Driveway Reconstruction Program and the Inflow and Infiltration Sewer Service
Inspection Program was also available at these meetings. Property owners were
also given the option to submit feedback/comments online in conjunction with
each open house.
All written comments received at or following the open house meetings, are
summarized in Appendix A: Summary of Property Owner Comments. These
written comments are a valuable tool for staff to identify issues that need to be
addressed as part of the project design.
The proposed improvements discussed in this portion of the feasibility report are
shown on Exhibits 2A through 2F: Proposed Project Layouts.
Sanitary Sewer and Water Main
Sanitary Sewer Rehabilitation
As discussed earlier in this report, a television inspection of the existing
sanitary sewer system was performed during the preliminary design portion of
this project. Based upon the results of the televising, it has been determined
that all of sanitary sewer mains within the project area are in need of repair.
The nature of the defects, including primarily cracked pipes and root intrusion,
indicates that the majority of the sanitary sewer mains can be rehabilitated by
structural lining. Sanitary sewer lining will be effective in repairing the defects
and addressing the infiltration issues within the City's system. In addition, there
is a sag in the sanitary sewer along Valders Avenue North, approximately 45
feet south of the Westbend Road intersection that will require pipe replacement.
The existing sanitary sewer defects are illustrated on Exhibit 7. The proposed
sanitary sewer improvements are illustrated on Exhibits 2A through 2F: Proposed
Project Layouts.
In addition to lining the sanitary sewer mains, this project will incorporate other
measures to reduce the amount of 1/1 being introduced into the City's sanitary
sewer main system. These 1/1 reduction efforts include the replacement of all
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sanitary sewer manhole castings and covers and the rehabilitation and
reconstruction of necessary sanitary sewer manholes. These measures have
been implemented in past PMP projects, and are consistent with the City's efforts
to address all sources of 1/1.
Sanitary Sewer Service Rehabilitation
As previously mentioned, property owners in the project area have been given
the opportunity to voluntarily have their sanitary sewer service inspected as part
of this project and as part of the City's ongoing 1/1 Reduction Program. The intent
of this voluntary inspection, which is funded by the City's water and sewer fund,
is to identify potential sources of 1/1 from the privately owned sanitary sewer
services. It is also intended to let the property owners know what sewer service
repairs are needed in order to become compliant with City Code. Property
owners can use the information provided in the inspection to plan for future
sewer service repairs, including participation in the sewer service repair program,
which includes the option to specially assess the work offered as part of the
proposed project.
Sewer service inspections will begin in late 2023 for property owners involved
with the project. Each property owner, including those who did not participate in
the voluntary inspection program, will be given the opportunity to have repairs
performed on their sanitary sewer service. These repairs will be performed in
conjunction with this project but will be completed under a separate contract from
the public improvements. Homeowners will be able to have their sewer services
lined, or removed and replaced, as part of this program.
Interested homeowners can enter into a three-way agreement with the
Contractor and the City. The Contractor performs the work, the City pays the
Contractor, and the homeowner reimburses the City over a ten year period via a
special assessment.
Water Main Rehabilitation
Based upon water system maintenance records, it is proposed that the existing
6-inch cast iron water main located in the project area be replaced as part of this
project with polyvinyl chloride (PVC) plastic pipe. As part of the water supply
modeling in the City's Comprehensive Plan, it is recommended that existing 6-
inch water main pipe be upsized as feasible to 8-inch pipe to assist with fire
protection system wide. The 6-inch ductile iron pipe on Valders Court will remain
in place.
Existing water services will be replaced with high -density polyethylene (HDPE)
plastic pipe to the right-of-way line. New curb stops will also be installed at the
right-of-way line on new water services. A temporary water supply system will be
required to provide water to the homes during water main replacement. The
proposed water main replacement is shown on Exhibits 2A through 2F: Proposed
Project Layouts.
A
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In addition to water main replacement, all hydrant and gate valves will be
replaced throughout the project area, with the exception of Valders Court.
Additional gate valves and hydrants will be added where needed to meet current
spacing requirements.
Stormwater Management
The entire 2024 PMP project area is part of the Bassett Creek Watershed, and is
contained within the Bassett Creek Main Stem (Upstream) subwatershed. Therefore,
the proposed improvements will be designed in accordance with the City's standards
and the Bassett Creek Water Management Commission (BCWMC) Requirements for
Improvements and Development Proposals, including the implementation of temporary
and permanent stormwater best management practices (BMPs) as part of the project
design and during construction. Additionally, the project will be required to obtain an
NPDES Construction Stormwater Permit from the Minnesota Pollution Control Agency
(MPCA).
The minimization of impervious surfaces such as street pavement, which generate
higher volumes of stormwater runoff than vegetated pervious surfaces, is a goal of PMP
design. Quantities of existing street impervious area, post construction impervious
area, and the overall decrease in impervious area for the 2024 PMP are summarized in
the table on the next page.
The 2024 PMP street reconstruction is a linear project that will disturb more than one
acre, therefore must be submitted to the Bassett Creek Watershed Management
Commission (BCWMC) for review and approval for erosion and sediment control
standards. As the linear project is not adding any net new impervious surfaces, the
2024 project area is exempt from BCWMC water quality standards.
The City of Golden Valley is a municipal separate storm sewer system (MS4) permittee.
MS4, as defined in Minnesota Rule 7090, is a conveyance or system of conveyances
including roads with drainage systems, municipal street, catch basins, curbs, gutters,
ditches, man-made channels, or storm drains: owned by a city, designed, or used for
collecting or conveying storm water, which is not a combined sewer, and that is not part
of a publicly owned treatment facility.
MS4 permit holders in Minnesota must satisfy the requirements of the MS4 general
permit if they are at least one of the following: located in an urbanized area and used by
a population of 1,000 or more, owned by a municipality with a population of 10,000 or
more, or have a population of at least 5,000 and the system discharges to specially
classified bodies of water. The MS4 general permit is designed to reduce the amount of
sediment and other pollutants entering state waters from storm water systems.
As an MS4 permittee, the City has a post construction stormwater management
standard that must be implemented, including treatment of the water quality volume on
any project where the sum of the new impervious and fully reconstructed impervious
surfaces equals one or more acres. Where the entire water quality volume cannot be
treated within the existing right-of-way, a reasonable attempt to obtain additional right-
0
DocuSign Envelope ID: F4971979-C4F4-4EE2-AF69-75538AE08578
of -way, easement, or other permission to treat the stormwater during the project
planning process must be made.
The City also adheres to the Minimal Impact Design Standards (MIDS) performance
goals for new development, redevelopment, and linear projects and the requirements of
BCWMC. MIDS, developed by the Minnesota Pollution Control Agency (MPCA), has a
set of performance goals and design standards to promote low impact development and
other stormwater management techniques. MIDS has a similar, but more stringent,
water quality volume requirement as the MS4 permit. To meet the MIDS performance
goal for linear projects, the water quality volume must be calculated as the larger of 1.1
inches of runoff from the net increase in impervious area, or 0.55 inches of runoff from
the new and fully reconstructed impervious surfaces. The required water quality volume
for the project area is summarized in the table below.
Newly
Required
Existing
Post Construction
Decrease of
Reconstructed
Water Quality
% Reduction
Impervious
Impervious Area
Impervious
Impervious
Volume *
of Impervious
Area (acres)
(acres)
Area (acres)
Area (acres)
(cubic feet)
Area
Street 5.51
5.05
0.46
5.05
10,091
8.3%
* Water quality volume is calculated, per the MIDS performance goal, as 0.55 inches of runoff from the
new and fully reconstructed impervious surfaces.
Per the BCWMC Requirements for Improvements and Development Proposals, Linear
projects on sites without restrictions that create one or more acres of net new
impervious surfaces shall capture and retain onsite 1.1 inches of runoff from the net
new impervious surfaces. This performance goal does not apply to this project since
the proposed improvements result in a reduction in impervious surface area.
Due to limited right-of-way on the 2024 PMP project, as well as a City Code prohibiting
infiltration practices within 25' of the sanitary sewer, the water quality volume as
described above, cannot be treated within the right-of-way. Since the project area is a
fully built out residential neighborhood, there is no additional right-of-way or easements
that can be acquired for substantial treatment. The City of Golden Valley has reached
out to property owners in the project area asking if any of them would like to add a small
rain garden or similar BMP to their property, but there was no interest.
Temporary BMPs will be installed during construction and will remain in place until
stabilization. A Stormwater Pollution Prevention Plan (SWPPP) will be prepared for the
project.
The majority of the proposed storm sewer improvements for the project area are
modifications, extensions, and/or replacements of the existing storm sewer system to
help facilitate drainage of streets, rights -of -way, and adjacent properties to the extent
feasible. There are new catch basins proposed to be installed at the intersection of
Orkla/Winnetka Heights Drive, as well as on Duluth Street 600 feet east of Wisconsin
Avenue. These storm sewer systems will be routed via trunk storm sewer to the
existing storm sewer systems along Westbend Road and Wisconsin Avenue,
respectively. Since the overall contributing area will not be changed with this additional
10
DocuSign Envelope ID: F4971979-C4F4-4EE2-AF69-75538AE08578
storm sewer, there will be no increase to the overall stormwater volume conveyed to the
existing trunk storm sewer system.
As with past PMP projects, a sump discharge drainage system is proposed within the
project area. This sump discharge drainage system consists of a piping system behind
the curb and a service stub for potential connection of private sump pump discharges.
The sump discharge drainage system is proposed for locations where a significant
number of sump pumps are present and provides an alternative to discharging sump
pumps above ground into backyards, the street, or into the sanitary sewer system,
where clear water flows are not allowed.
Additional Water Quality Measures
While infiltration is not feasible due to the typical clayey soils that prevent water
infiltration into the subsurface, rain gardens designed as filtration basins may be
feasible. The City will provide technical assistance to individual homeowners if
they desire to create "rain garden" filtration basins on their property.
Storm sewer sump manholes with manhole baffles will be installed throughout
the project area where practical, prior to stormwater discharge from the project
limits. Manhole baffles provide pre-treatment to stormwater entering the sump
manholes by filtering out sediment as it enters the manhole. The sump
manholes allow the larger debris and sediment that is filtered from the
stormwater by the manhole baffle to settle out in the sump, where it is cleaned
out on a regularly scheduled basis as part of the City's maintenance program.
Streets
The City of Golden Valley Pavement Management Program stresses the use of proper
pavement rehabilitation measures for each street. After reviewing the streets within the
project area, it has been determined that reconstruction to City standards is the
appropriate rehabilitation measure. This section of the report will discuss proposed
rehabilitation measures being recommended, as well as the structural and geometric
concerns encountered during preliminary design.
Street Widths
The existing street widths are illustrated in Exhibit 3: Existing Street Widths. The
proposed width of each street is shown on Exhibits 2A through 2F: Proposed
Project Layouts and on Exhibit 4: Proposed Street Widths.
For the 2024 PMP, streets typically match the City standard street width of 26
feet (measured face of curb to face of curb). At the east end of Duluth Street in
the project area, the street is proposed to be widened to 30 feet (face of curb to
face of curb) to provide additional space for on street parking for passengers who
access the Metro Transit bus stop at the Duluth Street and Winnetka Avenue
intersection.
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DocuSign Envelope ID: F4971979-C4F4-4EE2-AF69-75538AE08578
Subgrade Corrections
Based upon the subsurface conditions encountered within the project area, it is
recommended that subgrade correction occur beneath each street. Subgrade
correction is performed by removing soft, moisture -susceptible soils that are
structurally unsuitable, and backfilling with clean (minimal silt) granular material
such as sand or gravel.
The subgrade correction planned for all streets in the project area includes
subcutting and replacing the excavated soils with a minimum of three feet of
sand and the City's standard bituminous and gravel base street section. Refer to
Exhibit 5: Subcut Depths and Soil Boring Locations for an illustration of the
proposed subcut areas and depths.
Concrete Curb and Gutter
The installation of concrete curb and gutter is required by the City because of its
engineering and maintenance advantages. Curb and gutter provides pavement
edge support and protection, facilitates roadway drainage, and eliminates the
need for ditches. Given the practicality of curb and gutter and its usefulness, the
City's standard practice is to install concrete curb and gutter on all streets in the
project area.
The standard type of concrete curb and gutter on Golden Valley streets includes
a 6-inch high barrier curb and an 18-inch wide gutter (13618 concrete curb and
gutter).
Intersection and Curve Improvements
The existing intersection of Valders Avenue North and Winnetka Heights Drive is a
90-degree curve with a small radius. It is proposed to enlarge the radius of this curve
to flatten it out which will make plowing operations more efficient.
Improvements to the remaining intersections include installing concrete curb and gutter
throughout the project area to comply with City standards for residential streets.
Concrete curb and gutter facilitates improved drainage at each intersection as well as
provides edge protection to the new bituminous pavement.
Proposed geometrics for the project area are illustrated in Exhibits 2A through 2F:
Proposed Project Layouts.
Pedestrian Facilities
The current City of Golden Valley Sidewalk and Trail Plan identifies a future sidewalk on
Duluth Street to connect the General Mills Research Nature Area trail to Winnetka
Avenue North. The 2022 PMP constructed the western portion of the sidewalk between
the General Mills Nature Area and Wisconsin Avenue North. This project will begin the
sidewalk where the 2022 PMP ended at Wisconsin Avenue North and connect to the
sidewalk on Winnetka Avenue North.
Additional, pedestrian safety improvements are proposed at the north leg of the
Winnetka Avenue North/Duluth Street intersection. A pedestrian island is proposed to
12
DocuSign Envelope ID: F4971979-C4F4-4EE2-AF69-75538AE08578
be constructed on Winnetka Avenue North, replacing the existing two-way center left
turn lane. Southbound vehicles on Winnetka Avenue North wanting to make a left will
have to do so from the thru lane. All four existing pedestrian ramps at the Duluth
Street/Winnetka Avenue North intersection will be reconstructed in accordance with the
Americans with Disabilities (ADA) requirements. Coordination with Hennepin County
will be required to gain approval for these proposed improvements within County right-
of-way. The existing pedestrian routes through the project area are illustrated on
Exhibit 6: Pedestrian Routes.
Street Lighting
As described above, the project area does not contain any City -owned streetlights. No
new street lighting is proposed for the project area.
Tree and Landscape Impacts
The proposed project outlined in this feasibility report includes minimizing impacts to
landscaping, trees, and shrubs as a major design consideration. As a result, the
impacts have been minimized to the extent possible.
It is estimated that approximately 25 trees will be impacted by the proposed
improvements. The extent of the potential tree impacts due to the reconstruction of
sanitary sewer and water services cannot be quantified at this time. Because
maintenance of private sanitary sewer services is the responsibility of the individual
homeowners, the removal and replacement of trees and shrubs due to sewer service
repairs will also be the homeowners' responsibility. Any tree removals required for
sewer service repairs will be included in the assessable costs, but replacement trees or
shrubs will be the responsibility of the property owner. The potential impacts to trees,
shrubs and landscaping is one of the primary reasons that lining of sanitary sewer
services is the preferred method of rehabilitation.
Driveway Reconstruction Program
As with past PMP projects, homeowners within the project area whose driveways are
impacted by street reconstruction will be given the opportunity to have their driveway
replaced as part of the project, at contract unit prices. As part of this program, property
owners have the option of having the driveway reconstruction costs assessed against
their property for a period of 10 years.
It should be noted that the City may reject homeowner participation in the driveway
replacement program in situations where the reconstruction is excessively complicated
or the risk of additional liability to the City is high during the reconstruction of the
driveway. Challenging driveway reconstruction often includes pavement removal or
installation against the base of retaining walls, foundation, or basement walls or very flat
or steep grades.
The City also evaluates the number of driveways on a single property for compliance
with City Code Chapter 113-88 —Street Access. Staff will meet with homeowners
during final design to determine the status of secondary driveways. Typically, a
property is allowed a single driveway unless specific conditions are met.
13
DocuSign Envelope ID: F4971979-C4F4-4EE2-AF69-75538AE08578
ESTIMATED COSTS AND PROJECT FINANCING
Estimated Project Costs
The estimated costs for the improvements outlined in this report are separated by the
type of work and funding sources. These categories include utility work, storm drainage
improvements, and street reconstruction costs. The estimated project costs include
construction costs and construction contingencies, and an estimated 25 percent of the
construction costs as indirect costs. These indirect costs typically include project
design, surveying, construction administration, and legal costs.
Discussion on the financing and funding sources for the proposed improvements is
included in the next section of this report.
Sewer and Water Costs
The estimated sewer and water costs include all water main replacement,
sanitary sewer repairs (including service wye liners), and maintenance as
outlined within this report.
Estimated Construction Costs = $ 1,575,000
Estimated 25% Indirect Costs = $ 525,000
Estimated Sewer and Water Total = $ 2,100,000
Storm Drainage Costs
The estimated storm drainage costs include all storm sewer installation, water
quality measures, and erosion control.
Estimated Construction Costs = $ 900,000
Estimated 25% Indirect Costs = $ 300,000
Estimated Storm Drainage Total = $ 1,200,000
Street Reconstruction Costs
The estimated street reconstruction costs include all subgrade correction,
pavement, curb and gutter, and turf restoration.
Estimated Construction Costs = $ 4,125,000
Estimated 25% Indirect Costs = $ 1,375,000
Estimated Street Reconstruction Total = $ 5,500,000
Duluth Street Sidewalk Costs
The estimated sidewalk construction costs include new concrete sidewalk on
Duluth Street.
Estimated Construction Costs = $ 150,000
Estimated 25% Indirect Costs = $ 50,000
Estimated Sidewalk Reconstruction Total = $ 200,000
14
DocuSign Envelope ID: F4971979-C4F4-4EE2-AF69-75538AE08578
Total Proiect Costs
Estimated Sewer and Water Costs =
Estimated Storm Drainage Costs =
Estimated Street Reconstruction Costs =
Estimated Sidewalk Construction Costs =
Estimated Total Project Cost =
Proposed Project Financing
$ 2,100,000
$ 1,200,000
$ 5,500,000
$ 200,000
$ 9,000,000
The proposed financing of this project is a combination of special assessments to
properties abutting the streets being improved, Street Improvement funds, Duluth Street
Sidewalk funds, the Sewer and Water Reserve Fund, and the Storm Water
Improvement Fund. The following is a brief description of each of these funding
sources and a summary of the estimated amount to be funded from each source.
Special Assessments
The proposed special assessments for the 2024 Pavement Management Project
are consistent with the City of Golden Valley Special Assessment Policy and
Minnesota Statutes, Chapter 429. As outlined in the Special Assessment Policy,
residential properties are assessed on a per -unit basis for each single family or
duplex unit. Oversized lots that may potentially be subdivided into additional
conforming lots are assessed one unit assessment for each potential lot.
However, only one unit assessment is levied with the project, with the other
assessments being deferred until the property is subdivided.
Corner residential lots are assessed one-half unit for each of the lot's frontage
being improved, with no more than one full unit assessed, unless the lot could be
subdivided. Corner lots adjacent to County roads are assessed one full unit for
the local street being reconstructed.
The use of special assessments for financing public improvement projects is
outlined in Minnesota Statutes, Chapter 429. This law requires that when special
assessments are used to finance projects a minimum of 20% of the project cost
must be specially assessed. Therefore, because special assessments are being
used to finance a portion of the street reconstruction costs, the assessments
must be at least 20% of that cost. The project costs associated with sanitary
sewer, watermain and storm sewer construction are financed from dedicated
funds, and special assessments are not utilized for funding for utilities. Special
assessments are also not planned to be utilized for the proposed Duluth Street
sidewalk improvements, as those improvements would be funded by Duluth
Street Sidewalk funds.
Preliminary special assessment rates of $11,100.00 per single-family residential
unit represent approximately 20% of the estimated construction costs for a 26-
foot-wide local street. The final special assessment rate will be calculated
following the opening of construction bids and will be based on actual costs.
15
DocuSign Envelope ID: F4971979-C4F4-4EE2-AF69-75538AE08578
Based upon the current schedule for the 2024 PMP project, it is anticipated that
the construction contract award and the Public Hearing for the Special
Assessments will be held at the March 5, 2024 City Council Meeting.
As shown on Appendix B: Preliminary Special Assessment Roll, the estimated
amount of street reconstruction costs to be financed through special
assessments is $937,950.00.
Sewer and Water Reserve Fund
The Sewer and Water Reserve Fund will be the funding source for all sanitary
sewer and water main work discussed within this report. The estimated amount
to be funded from this source is $2,100,000. The Sewer and Water Reserve
Fund is financed from sanitary sewer and water utility fees.
Storm Sewer Improvement Fund
All storm drainage improvements, including lateral storm sewer extensions, drain
tile, erosion control, and stormwater BMPs are funded from the Storm Sewer
Improvement Fund. The estimated amount to be funded from this source is
$1,200,000. The Storm Sewer Improvement Fund is financed from stormwater
utility fees paid by all properties in the City.
Street Improvement Funds
All street rehabilitation costs not funded by special assessments will be funded
using street improvement tax levies. These levies are used to repay bonds
sold to finance the project. The estimated amount to be funded from this source
is $5,500,000. The City will be applying for Active Transportation funding grants
to pay for the pedestrian improvements at the intersection of Winnetka Avenue
North and 23rd Avenue North If unsuccessful, those improvements will be funded
using Street Capital Improvement Plan (CIP) dollars.
Duluth Street Sidewalk Improvement Funds
All proposed Duluth Street sidewalk will be funded using Duluth Street Sidewalk
funds. The estimated amount to be funded from this source is $200,000.
Financing Summary
The following is a summary of the amounts to be funded from each of the
sources discussed above.
Sewer and Water Reserve Fund =
$
2,100,000
Storm Sewer Improvement Fund =
$
1,200,000
*Street Improvement Funds =
$
5,500,000
Duluth Street Sidewalk Funds =
$ 200,000
Estimated Total Project Cost =
$
9,000,000
*Street Reconstruction Bonds are sold, paid back with Special Assessments.
16
DocuSign Envelope ID: F4971979-C4F4-4EE2-AF69-75538AE08578
SUMMARY AND RECOMMENDATIONS
This feasibility report for the proposed 2024 Pavement Management Project has been
prepared in accordance with the Golden Valley City Council's authorization on
October 6, 2022. The proposed improvements are part of a City-wide Pavement
Management Program adopted by the City in order to provide a high -quality street
system in a long-term, cost-effective manner. The Pavement Management Program
also includes the rehabilitation and/or replacement of the existing sanitary sewer, water
main, and storm sewer systems as needed with each project. This report discusses the
proposed improvements to streets illustrated on Exhibit 1: Project Location Map, which
are proposed to be constructed during the 2024 construction season.
Engineering staff has determined that the improvements outlined in this report are
feasible from an engineering perspective. These improvements are consistent with the
City of Golden Valley Pavement Management Program and will benefit the community
and those properties abutting the proposed improvements. The City Council should
determine the cost-effectiveness of the proposed improvements.
Staff recommends approval of City Improvement Project No. 24-01, 2024 Pavement
Management, as discussed within this report. Staff further recommends that the City
Council authorize advertising for bids to construct the project.
17
Exhibits
Exhibit 1 - Project Location Map
Exhibit 2A — 2F - Proposed Project Layouts
Exhibit 3 - Existing Street Widths
Exhibit 4 - Proposed Street Widths
Exhibit 5 - Subcut Depths / Soil Boring Locations
Exhibit 6 - Pedestrian Routes
Exhibit 7 - Sanitary Sewer Defects
Exhibit 8 — Watermain Breaks
DocuSign Envelope ID: F4971979-C4F4-4EE2-AF69-75538AE08578
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Building a Better World for All of K
Sustainable buildings, sound infrastructure, safe transportation systems, clean water,
renewable energy and a balanced environment. Building a Better World for All of Us
communicates a company -wide commitment to act in the best interests of our clients
and the world around us.
We're confident in our ability to balance these requirements.
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