D-3. Orchard Lane Area Street and Utility Reconstruction City Project 18-01: Accept Feasibility Study, Call Public Hearing CITY OF CHANHASS-EN
Chanhassen is a Community for Life-Providing for Today and Planning for Tomorrow
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MEMORANDUM
TO: Todd Gerhardt, City Manager
FROM: Paul Oehme, Public Works Director/City Engineer `
DATE: August 14, 2017
SUBJ: 2018 Street Reconstruction Project No. 18-01: Accept Feasibility Study; Call
Public Hearing
PROPOSED MOTION
"The City Council accepts the feasibility report for the 2018 Street Reconstruction Project No.
18-01 and calls the public hearing for August 28, 2017.
City Council approval requires a simple majority vote of the City Council present."
BACKGROUND
On March 13, 2017, the City Council approved a consultant contract for the 2018 Street
Reconstruction Project and authorized preparation of the feasibility study.
On July 12, 2017, an open house was held to discuss the proposed project.
DISCUSSION Orchard Lane
Neighborhood
Every year the City considers streets that are in poor V0
condition to be rehabilitated or reconstructed. For the 2018
Street Reconstruction Project, staff is proposing to make
improvements to approximately 0.7 miles of streets. The
street segments within the proposed project were identified
by the City's Pavement Management software, site
investigations and utility problems in the area.
The proposed project is in the Orchard Lane neighborhood in
the northwest corner of the city.
Sixty-fourth (64th) Street was constructed in 1988 and was
sealcoated in 1995 and 1999. All other streets where
generally constructed in 1974 and were sealcoated in 1995 and 1999. The pavement condition
indices (PCIS) are shown on the graphic below. A PCI of 100 represents a new street. Streets with a
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PCI below 45 typically indicate distresses that require a full reconstruction,therefore it is no longer
cost effective to repair the streets with minor maintenance or perform a bituminous overlay.
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The street widths vary between 20' and 26' within 30' up to 60' wide of right-of-way. The drivable
portion of the streets (i.e. the bituminous surface and the concrete gutter) is proposed to be the same
as the existing widths.
Sixty-fourth(64h) Street has curb and gutter and was constructed in 1988. These streets are
somewhat newer than the other streets and show less distress. However, the streets area significantly
block cracked and major maintenance is needed at this time. An overlay would prolong the life of the
street however the street will show the reflective cracks soon after the street is paved. The street is
proposed for a partial reconstruction which would include reclaiming the existing roadway, removing
some of the subgrade,placing 10"of reclaimed material as aggregate base matching the existing
section, spot curb and gutter replacement, and placing new 4"bituminous surfacing.
All other streets are proposed to be fully reconstructed. The proposed pavement section includes 18"
of sand, 10" of Class 5 and 4" of bituminous as recommended by the soils engineer. Surmountable
curb is proposed to be installed in this area. Draintile is proposed to be added in the back of the curb.
Watermain Improvements
The watermain in this area is either cast iron or ductile iron pipe. Sixty-fourth (64th) Street is the only
area with ductile iron pipe which is not proposed to be replaced. One documented watermain break is
shown on the graphic below. Due to the poor performance of cast iron pipe in the City, staff is
proposes to replace the cast iron pipe with PVC watermain. All services would also be replaced
where watermain is being replaced.
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Sanitary Sewer Improvements
Staff has investigated and televised the condition of the sanitary sewer in this area. Approximately
110 feet of sewer is proposed to be replaced due to the condition of the pipe. The remaining sewer
pipe is in good structural condition, although some requires mineral removal, grouting and/or lining
to reduce the incidence of inflow and infiltration. These minor repair areas are also proposed to be
fixed at this time.
Storm Sewer Improvements
This areas have very little stormwater infrastructure. Using the Surface Water Management Plan, a
new storm sewer system is proposed for the project area. Based on a hydrologic analysis, there is a
need for catch basins and storm sewer to transition from rural sections to urban sections and to tie
into the existing public storm sewer on the easterly end of the project area. The system will be
comprised of reinforced concrete pipe (RCP).
Stormwater water quality improvement options have been identified along with estimated costs and
treatment efficiencies for two different potential water quality treatment options to provide improved
conveyance and stormwater treatment. The proposed options would implement stormwater measures
to provide treatment to reduce both phosphorous and total suspended solids while still providing
conveyance and rate control. Though several options were reviewed for feasibility, the limited public
land available, topography and narrow right-of-way in this area limits the options for stormwater
improvements. Easements may be required depending on the specific option(s) chosen.
The specific water quality Best Management Practices (BMPs) recommended for consideration
consist of:
1. Rain gardens at 2500 and 2630 Orchard Lane at the existing low point.
2. Adding a drainage swale on the City property at Herman Field Park.
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Feasibility Report
The feasibility report was prepared by WSB and Associates. A copy of the feasibility report is
available in the Engineering Department.
An open house was held on Wednesday, July 12, 2017 to discuss the proposed project and to answer
questions; approximately 30 people attended. All of the residents' questions were answered at the
meeting and/or with a follow-up after the meeting.
PROJECT FUNDING
Assessments will be based on the City's assessment practice of assessing 40% of the street
improvement cost to the benefitting properties on a per lot basis. The assessments would be proposed
for a 10-year term at an interest rate of prime rate plus 2% at the time the contract is awarded.
Budgets for the proposed work have been included in the 2017 CIP. A summary of the feasibility
estimate and CIP budget is below:
Funding Source Feasibility Budget
Estimate
Revolving Assessment Fund $ 1,184,000.00 $1,687,300
Stormwater Utility Fund $ 262,000.00 $200,000
Sanitary Sewer Utility Fund $100,000 $250,000
Water Utility Fund $560,000 $770,000
Total $2,106,000 $2,907,300
The estimated costs include 10% contingency and 11% indirect costs.
Estimated Assessments (Orchard Lane, Forest Circle, Forest Lane, and Oriole Ave):
Total estimated assessable street costs: $739,926.00
40% assessed: 40% of$1,203,600 = $295,970.40
36 assessable units
$295,970.40 - 36 units =$8,221.40/unit**
Estimated Assessments for 64th Street:
Total estimated assessable street costs: $110,890.00
40% assessed: 40% of$1,203,600 = $44,356.00
12 assessable units
$44,356.00 - 12 units = $3,696.33/unit**
The estimated assessment lies within the benefit range identified of past consultation reports.
SCHEDULE
The proposed project schedule is as follows:
Public Hearing; Authorize Preparation of Plans and Specifications August 28, 2017
Approve Plans and Specifications; Authorize Advertisement for Bids Dec. 11, 2017
Call Assessment Hearing March, 2018
Assessment Hearing; Accept Bids and Award Contract April, 2018
Start Construction June, 2018
Construction Substantially Complete August, 2018
Attachments: 1. CIP pages
2. Resolution
gAeng\public\_2018 projects\18-01 orchard lane area recon\communication\20170814 proj 18-Olaccept feasibility.doc
Capital Improvement Program 2017 thru 2021 Department Street Improvements
City of Chanhassen, MN Contact Paul Qchme
Project M ST-012 Type Improvement
pseful Lite Unassigned
Project Name Annual Street Improvement Program Category Streets/Highways
Account Ml 601-xxxx-4751 Account M3 Priority n/a
Account M2 Account#4
Description Total Project Cost. $30,680,000
Annual project to rehabilitate and reconstruct streets in the City. Current 5-year plan shows the following neighborhood areas:
2017-Minnewashta Manor area and Lake Susan Hills Drive area (P
MSA-Park Road and Park Place 1
2018-Orchard Lane area
MSA-Lake Drive East and Dakota Ave(Highway 5 to Lake Drive East) (�
2019-Choctaw area,Kurvers Point area and 96th Street f
MSA-Minnewashta Parkway overlay and trail
2020-Chan View area
MSA-Lake Lucy Road(Highway 41 to Galpin Blvd)and trail
2021 -Stone Creek area and Cites Mar Drive
Justification
The City uses a Pavement Management System to monitor the condition of the City streets. While proper preventative maintenance extends the
life of the street and is cost effective,a street will eventually deteriorate to a point that further maintenance is no longer cost effective. ;1
Rehabilitation pmiects extend the life of the street. In cases when utilities or poor sub grade needs to be replaced or where streets have
deteriorated to a point where rehabilitation will no longer be practical,reconstruction of the street is necessary. A feasibility study is written to
consider the merits of the project and scope of work.
Prior Expenditures 2017 2018 2019 2020 2021 Total
16,405,000 Construction 4,375,000 2,700,000 2,300,000 3,800,000 1,100,000 14,275,000
'Dotal Total 4,375,000 2,700,000 2,300,000 3,800,000 1,10D,000 14,275,000
Prior Funding Sources 2017 2018 2019 2020 2021 Total
16,405,000 Assessment/Revolving 3,275,000 1,600,000 1,100,000 3,300,000 1,100,000 10,375,000
Assess Fund
Total MSA 1,10000 1,100,000 1,200,000 500,000 3,900,000
Total 4,375,000 2,700,000 2,300,000 3,800,000 1,100,000 14,275,000
Budget Impact/Other l
This project may decrease maintenance costs.
Capital Improvement Program 2017 thru 2021 Department Sanitary Sewer Improvements
City Of Chanhassen, MN Contact Paul Ochme
Project# SS-014 Type Improvement
Project Name useful Life Unassigned
Sanitary Sewer Replacement Category utilities
Account#1 701-70254751 Account 113 Priority n/a
Account#2 Account 94
Description ' Total Project Cost: $2,110,000
Replacement or rehabilitation of existing sanitary sewer lines in conjunction with the reconstruction of the City street.
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Justification
The City considers the condition of the existing utilities in the process to seleot streets for rehabilitation in an effort to realize cost savings by
consolidating these projects.
Prior Expenditures 2017 2018 2019 2020 2021 Total
1,300,000 Construction 210,000 250,000 50,000 250,000 50,000 810,000
Total Total 2101000 250,000 50,000 250,000 50,000 810,000
Prior Funding Sources 2017 2018 2019 2020 2021 Total
17300,000 Sewer Utility Fund 210,000 250,000 50,000 250,000 50;000 810,000
Total Total 210,000 250,000 50,000 250,000 50,000 810,000
Budget hnpact/Other
This project will decrease maintenance costs.
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Capital Improvement Program 2017 thru 2021 Deparmient Surface Water Management
City of Chanhassen, MN Contact Paul Oehme
Project H SWMP-019 Type Improvement
Useful Life Unassigned
Project Name Street Improvement Projects-Storm Water Mgmt Category SWMP
Account Hl 720-7025-4751 Account 43 Priority n/a
Account H2 Account H4'
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Description Total Project Cost: $2,685,000
�n annual amount set aside for storm water management infrastructure construction or expansion associated with street improvement projects
undertaken by the engineering and public works departments.
Justification
Street improvement projects frequently require construction or expansion of storm water management infrastructure in order to comply with
federal,state and local regulations,as well as protecting existing and proposed development adjacent to the projects.
Prior Expenditures 2017 2018 2019. 2020 2021 Total
1,525,000 Construction 500,000 250,000 80,000 250,000 80,000 1,160,000
Total Total 500,000 250,000 80,000 250,000 $0,000 1,460,000
Prior Funding Sources 2017 2018 2019 2020 2021 Total
17525,000 Surface Water Utility Fund 500,000 250,000 80,000 250,000 80,000 1,160,000
"Total Total 500,000 250,000 80,000 250,000 80,000 1,160,000
Budget Impact/Other
Inventory,inspection and maintenance of new infrastructure will be required. Citywide.No map
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Capital Improvement Program 2017 rhru 2021
pcpartment Water System Improvements
'silty of Chanhassen, MN Contact Paul Oehme
Project# W-424
Type Improvement
Project Name Watermain ReplacementUseful Life Unassigned
Category Utilities
Account#1 700-7025.4751 Account 43 Priority n/a
Account 02 Account#4
Description Total Project cost. $5,220,000
Replacement of existing water main lines in coordination with the reconstruction of the City street projects or minor fixes of water distribution
system for street rehabilitation projects.
Justification
The City considers the condition of the existing utilities in the process to select streets for rehabilitation in an effort to realize cost savings by
consolidating these projects and also to avoid potential cuts in recently improved streets.If significant repairs are necessary to the existing water
main,replacement may be the most cost effective option. Given the highly corrosive soils in the City,water main replacement is an ongoing
project in the City.
Prior Expenditures 2017 2018 2019 2020 2021 Total
3;325,000 1 Construction 75,000 770,000 100,000 850,000 100,000 1,895;000
Tota l Total 75,000 770,0¢0 100,000 850,000 100,000 1,895,000
Prior Funding Sources 2017 2018 2019 2020 2021 Total
3,325,000 1 Water Utility Fund 75,000 770,000 100,000 850,000 100,000 1,895,000
Total Total 75,000 770,000 100,000 850,000 100,000 1,895,000
Budget Impact/Other
These projects will decrease maintenance costs.
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CITY OF CHANHASSEN
CARVER AND HENNEPIN COUNTIES,MINNESOTA
DATE: August 14,2017 RESOLUTION NO: 2017-XX
MOTION BY: SECONDED BY:
A RESOLUTION ACCEPTING FEASIBILITY STUDY AND
CALLING THE PUBLIC HEARING FOR THE 2018 STREET
RECONSTRUCTION PROJECT NO. 18-01
WHEREAS, pursuant to resolution of the Council adopted March 13, 2017, a report has been
prepared by City staff with reference to the above-referenced project, and this report is being received
by the Council on August 14, 2017, and
WHEREAS, the report provides information regarding whether the proposed project is
necessary, cost-effective, and feasible.
NOW,THEREFORE,BE IT RESOLVED by the Chanhassen City Council:
1. The Council will consider the improvement of such project in accordance with the report and
the assessment of abutting properties for a portion of the cost of the improvement pursuant to
Minnesota Statutes, Chapter 429 at an estimated total cost of the street improvements of$2,106,000.
2. Public hearing for the proposed improvements within the 2018 Street Reconstruction Project
No. 17-01 shall be held on August 28, 2017 in the Council Chambers of City Hall at 7:00 PM.
The clerk shall give mailed and published notice of the hearing and improvement as required by law.
Passed and adopted by the Chanhassen City Council this 14th day of August, 2017.
ATTEST:
Todd Gerhardt, City Manager Denny Laufenburger, Mayor
YES NO ABSENT