1c. Audubon Road Recon Project: Approve Plans and Advertising for Bids
CITY OF
CHANHASSEN
7700 Market Boulevard
PO Box 147
Chanhassen, MN 55317
Administration
Phone: 952.227.1100
Fax: 952.227.1110
Building Inspections
Phone: 952.227.1180
Fax: 952.227.1190
Engineering
Phone: 952.227.1160
Fax 952.227.1170
Finance
Phone: 952.227.1140
Fax: 952.227.1110
Park & Recreation
Phone: 952.227.1120
Fax: 952.227.1110
Recreation Center
2310 Coulter Boulevard
Phone: 952.227.1400
Fax: 952.227.1404
Planning &
Natural Resources
Phone: 952.227.1130
Fax: 952.227.1110
Public Works
1591 Park Road
Phone: 952.227.1300
Fax: 952.227.1310
Senior Center
Phone: 952.227.1125
Fax: 952.227.1110
Web Site
WWN.ci .chanhassen. mn. us
MEMORANDUM
TO:
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--
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Paul Oehme, Director of Public Warks/City Engineer
<7.(
\
FROM:
Alyson Fauske, Assistant City Engineer
DATE:
6~
March 8, 2010
SUBJECT: Audubon Road (Lake Drive West to Lyman Boulevard) Widening
and Reconstruction Project No.1 0-02: Approve Plans and
Specifications; Authorize Advertisement of Bids
PROPOSED MOTION
"The City Council is recommended to approve the plans and specifications for
City Project No. 10-02, Audubon Road (Lake Drive West to Lyman
Boulevard) Widening and Reconstruction Project and authorize the
advertisement for bids.
City Council approval requires a simple majority vote of the City Council
present. "
BACKGROUND
On July 13 2009, staff discussed the proposed
2010 street reconstruction projects with the
City Council at the work session.
On August 10, 2009, City Council awarded
the preliminary design consultant contract to
SRF Consulting Group, Inc. (SRF).
A neighborhood open house was held
December 2,2009 to discuss the project with
the property owners that are proposed to be
assessed.
An open house for the neigqborhood was held
on January 13,2010. .
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Audubon Road . L~::--1-
(Lake Drive West to ~./>-.~\ JIM
Lyman Boulevard)/ \
City Council held the public hearing at the February 8,2010 meeting.
Chanhassen is a Community for Life - Providing lor Today and Planning lor Tomorrow
Audubon Road Reconstruction Project
Approve Plans & Specs; Authorize Ad for Bid
March 8, 2010
Page 2
SCOPE OF PROJECT
Street Improvements
Audubon Road from Lake Drive West to Lyman Boulevard (CSAH 18) is a municipal collector
roadway and is proposed to be reconstructed this year. The pavement is in poor condition and
shows severe pavement distress. The average pavement condition indices (PCI) range from 17
to 40 with the average being 31; a road at 45 PCI typically indicates distress that would require a
full depth reconstruction. The roadway is a rural section with gravel shoulders. The gravel
shoulders on the hill washout frequently and become a hazard to the traveling public. The
shoulders are also a maintenance concern for staff. The proposed urbanization of the street and
the storm sewer installation will eliminate this problem.
Turn lanes are proposed along Audubon Road for safety reasons. The corridor is not proposed to
be widened but improved to about the current width of the pavement section when the gravel
shoulders are included. Most intersections already have substandard right turn lanes. Left turn
lanes are proposed to be added at most intersections. A common center left turn lane is proposed
to be added at the south end of the corridor for residential driveway access. Turn lanes would be
expensive to install in the future iftraffic problems were to increase. The traveled thru lanes are
proposed to be 14' wide in most areas and 12' wide at some intersections. Staffis proposing to
keep the width of the thru lanes narrow as a traffic calming technique. The intersection at Valley
Ridge Trail North/Osprey Lane is proposed to be 52' wide to accommodate the left turn lanes
and right turn lane improvements. This intersection is currently 48' wide.
Trail Improvements
A 10- foot wide trail is proposed to be extended on the west side of Audubon Road from Valley
Ridge Trail North to Lyman Boulevard. The trail is proposed to be off road and in back of the
curb for safety considerations. The Parks Department Trail Comprehensive Plan identifies this
trail as an important connection. The trail's anticipated use may include recreation,
transportation, a non-motorized route for workplace commuting and a training route for high
school athletic teams. Completion of this trail will allow residents in the area the opportunity to
create looping routes for their walks and other trail recreation activities. Looping routes are
much preferred over out-and-back routes. The trail will also connect to the future trial on
Lyman Boulevard east of Audubon Road. The boulevard area between the back of curb and the
trail will vary between 5' and 8 feet.
Temporary construction easements are necessary at the south end of Audubon Road to
accommodate the trail construction. The appraisals for the affected properties are complete and
offer letters have been sent to the property owners. Some trees and brush will need to be
removed from the easement. Staff is planning to work with the property owners on replanting
some trees in the temporary easements.
Storm Water Management
The pond on the south side of Lyman Boulevard was oversized in conjunction with the Lyman
Boulevard reconstruction project to treat the runoff from the southern % of this segment of
Audubon Road. A storm sewer pipe was stubbed to the north side of Lyman Boulevard forthe
G:\ENG\PUBLIC"--2010 Projects\1O-02 Audubon Road Imp\app plans&specs 03-08-1O.docx
Audubon Road Reconstruction Project
Approve Plans & Specs; Authorize Ad for Bid
March 8, 2010
Page 3
future reconstruction of Audubon Road. The oversizing was designed based on Audubon Road
being reconstructed to a 44-foot wide road. Runoff from the northern ~ of the project area is
proposed to be treated in the existing storm water pond on the southeast comer of Lake Drive
West and Audubon Road. A new storm sewer pipe outlet will be needed to this pond. The City
has an easement over this pond so no additional. easements are anticipated. Curb and gutter is
proposed to be added for safety due to the proposed trail on the back side of the curb and to
direct the roadway runoff to the catch basins.
A box culvert for Bluff Creek is located at the southern end ofthe project area to convey flow
under Audubon Road. SRF reviewed the existing structural integrity of the box culvert and
determined that it is in good condition. The box culvert must be extended in conjunction with
the trail construction. The proposed location of the box culvert extension is under a drainage and
utility easement.
Utility Improvements
A 12-inch diameter trunk watermain is within the western right of way of Audubon Road. There
are no records ofwatermain breaks in the project area. The gate valve and hydrant bolts within
the corridor are proposed to be replaced. Some hydrants will need to be relocated in conjunction
with this project.
Water services are proposed to be extended to properties along Audubon Road that do not
already have water service. These improvements are proposed at this time because it would be
more cost effective to make these improvements at the time the road is being reconstructed. The
water service extension is proposed to be assessed back to the benefiting property owners as an
optional improvement. The estimated cost for this improvement is $1,175/unit.
A sanitary forcemain exists under this portion of Audubon Road. The gate valve bolts to the
forcemain are proposed to be replaced. The gravity sanitary sewer within the project corridor
has been televised and appears to be in good condition; therefore no sanitary sewer
improvements are proposed.
Private Utilities
The electric, telephone and cable lines are overhead through most of the project corridor. Due to
the capacity of the electrical lines, Xcel has indicated power lines cannot be buried. It is
anticipated many ofthe utility poles would need to be moved with this project. Staff does not
have a plan from Xcel at this time if and where the poles will be moved.
A petroleum pipeline crosses under Audubon Road near Valley Ridge Trail South. The road is
proposed to be lowered approximately a ~ foot at this location. Staff has been in contact with
this utility company regarding this project.
Street Lighting
Additional intersection street lights are proposed at the Osprey Lane, Valley Ridge Trail South
and Sunridge Court for safety. No additional street lights are proposed along the corridor at this
time.
G:\ENG\PUBLIC'-201O Projects\IO-02 Audubon Road hnp\app plans&specs 03-08-10.docx
Audubon Road Reconstruction Project
Approve Plans & Specs; Authorize Ad for Bid
March 8, 2010
Page 4
Permits and Approvals
Reconstruction of the roadways will disturb over one acre and will require a National Pollution
Discharge Elimination Systems (NPDES) General Storm Water Permit (MNR 100001) that must
be obtained by the City of Chanhassen from the Minnesota Pollution Control Agency (MPCA).
Replacement of the sanitary sewer and watermain will require permits from the Minnesota
Pollution Control Agency (MPCA) and the Minnesota Department of Health (MDH),
respectively.
PROPOSED FUNDING AND ESTIMATED ASSESSMENTS
The estimated costs for the Audubon Street Reconstruction Project No. 10-02 from Lake Drive
West to Lyman Boulevard are $2,760,000. A 15% construction contingency, 15% for indirect
costs and estimated inflation are included in the estimate.
Special assessments to the benefitting properties are proposed to pay for a portion of the street
costs associated with this project. The remaining street costs are proposed to be paid from the
sale of municipal bonds. The preliminary funding is as follows:
Funding Source
Sale of Municipal Bonds
Street Assessments
Water Service Assessments
Amount
$2,703,765
$50,360
$5,875
$2,760,000
The proposed Audubon Road reconstruction project is unique in that the proposed street is wider
than a typical residential road and driveway access to Audubon Road is limited due to the higher
traffic volumes and speed. This results in a higher street reconstruction cost and fewer
benefitting properties than a typical street reconstruction project. This issue is however no
different than other streets the City has recently reconstructed. Examples of other streets the City
has reconstructed that were wider than the typical residential street are Laredo Drive, W. 78th
Street and Lake Lucy Road. To compensate for this difference and to be consistent with past
reconstruction project assessment methodology, staff proposes the following:
1. The amount to be assessed is based on a 31- foot wide street, and
2. The number of benefitting units assumes 90-foot wide lots on both sides of Audubon
Road: 8,500 frontage feet -;- 90 front feet/benefitting unit = 94.4 benefitting units
G:\ENG\PUBLIC'L2010 Projects\IO-02 Audubon Road Imp\app plans&specs 03-08-10.docx
Audubon Road Reconstruction Project
Approve Plans & Specs; Authorize Ad for Bid
March 8, 20 I 0
Page 5
The following graphic illustrates the proposed assessment methodology and estimated unit
assessment:
If Audubon Road were a
local street, there would
be 90' wide lots on each
side of the road.
This section of
Audubon Road is
~4,250 feet long, or
8,500 frontage feet
8,500 frontage feet
-;- 90 frontage feet/unit
= 94.4 assessment units
$594,240 -;- 94.4
assessment units =
$6,295/unit
SCHEDULE
Total Estimated Project Cost
$2,7.60,000
.
Estimated Cost, 31' wide road Oversizing Cost Paid
$1,485,600 by City
$1,274,400
40% typically 60% Paid by City
assessed
$594,240 $891,360
Total amount Amount paid by the City:
assessed: $594,240 - $50,360
$6,295 x 8 units =
$50,360 = $543,880
~ ,
..
Total Amount Paid by the City:
$1,274,400 + $891,360 + $543,880 =
$2,709,640
The anticipated project schedule is as follows:
Bid Opening
Neighborhood Meeting
Assessment Hearings/Award Contract
Start Construction
Substantial Construction Complete
Final Wear Course Complete
Attachments: 1.
2.
3.
April, 2010
April, 2010
May, 2010
May, 2010
August 27,2010
June, 2011
CIP Page
Resolution
Preliminary Assessment Roll
G:\ENG\PUBLlC\)O 10 Projects\10-02 Audubon Road Imp\app plans&specs 03-08- I O.docx
Capital Improvement Program
City of Chanhassen, MN
2010 thru 2014
Department Street Improvements
Contact Paul Oehme
Account #1
Account #2
Account #3
Account #4
Type Improvement
Useful Life
Category" StreetslHighways
Priority nla
Project #
ST -022
Project Name Audubon Street Project
Description
Annual project to rehabilitate and reconstruct streets in the City.
Total Project Cost: $3,000,000
2010 - Audubon Road Lyman Blvd, to Lake Drive West
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.
Rehabilitation projects extend the life of the street. In cases with utility 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.
Expenditures 2010 2011 2012 . 2013 2014 Total
,. Construction 3,000,000 3,000,000
"
Total . 3,000,000 3,000,000
i~~
K
"
Funding Sourc~ 2010 2011 2012 2013 2014 Total
GO Bonds 3,000,000 3,000,000
Total 3.000,000 3,000,000
Budget Impact/Other
This project may decrease maintenance costs.
103
CITY OF CHANHASSEN
CARVER AND HENNEPIN COUNTIES, MINNESOTA
DATE:
March 8.2010
RESOLUTION NO:
2010-
MOTION BY:
SECONDED BY:
A RESOLUTION APPROVING PLANS AND SPECIFICATIONS
AND AUTHORIZING ADVERTISEMENT FOR BIDS FOR THE
AUDUBON ROAD RECONSTRUCTION PROJECT NO. 10-02
WHEREAS, pursuant to the resolution passed by the Council on February 8, 2010, the City
Engineer has prepared plans and specifications for the Audubon Road Reconstruction Project and
has presented such plans and specifications to the Council for approval;
NOW, THEREFORE, BE IT RESOLVED that the Chanhassen City Council:
1. Such plans and specifications, a copy of which can be reviewed at the office of the City
Engineer, are hereby approved.
2. The city clerk shall prepare and cause to be inserted in the official city newspaper and
Construction Bulletin, an advertisement for bids upon the making of such improvement under such
approved plans and specifications. The ad shall be published at least three times, shall specify the
work to be done, shall state that bids will be opened and that the responsibility ofthe bidders will
be considered by the Council at 7:00 PM on Monday, April 26, 2010, in the Council Chambers of
the City Hall. 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 bid security payable to the
clerk for 5% ofthe amount of such bid.
Passed and adopted by the Chanhassen City Council this 8th day of March, 2010.
ATTEST:
Todd Gerhardt, City Manager
Thomas A. Furlong, Mayor
YES
NO
ABSENT
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