1c. Audubon Road Project: Accept Feasibility Report and Call PH
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
www.ci.chanhassen.mn.us
1-c,
...--
MEMORANDUM
<7 b.
TO: Paul Oehme, Director of Public Works/City Engineer f'
FROM:
Alyson Fauske, Assistant City Engineer
~~
pj(~,
DATE:
January 25,2010
SUBJECT: Audubon Road Street Reconstruction Project No. 10-02: Accept
Feasibility Reports and Call the Public Hearing
PROPOSED MOTION
"The City Council is recommended to adopt the feasibility report for the
Audubon Road Street Reconstruction Project No. 10-02 and Call the Public
Hearing for February 8, 2010.
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 was held on January 13,2010.
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 6 to 32; 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
Chanhassen is a Community for Life - Providing for Today and Planning for Tomorrow
Paul Oehme
Audubon Road Street Reconstruction Project
January 25,2010
Page 2
maintenance concern for staff. The proposed urbanization of the street and the storm sewer
installation will eliminate this problem.
Audubon Road is proposed to be urbanized and turn lanes added for safety. 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 turnlane 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 if traffic problems were to increase in the future. The traveled
through lanes are proposed to be 14' wide in most areas and 12' wide at some intersections. Staffis
proposing to keep the width of the through lanes narrow as a traffic calming technique. The
intersection at Valley Ridge Trail North/Osprey Lane is proposed to be 52 feet to accommodate the
left turn lanes and right turn lane improvements. This intersection is currently 48' wide.
Trail Improvements
A lO-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.
Staffhas looked at the pros and cons to construct the trail on both sides of Audubon and is
recommending the trail be constructed on the west side. If the trail would be extended on the east
side, a significant stand of mature trees would need to be removed, extensive grading would be
necessary and a retaining wall would need to be constructed. A driveway would also need to be
relocated or replaced to accommodate the trail. Additional permanent easements would also be
required. Installing the trail on the west side of the road utilizes a superior trail corridor, requires
significantly less fmancial investment and puts the trail on the side of the road with the densest
residential development. These residents will benefit by being afforded a second convenient access
to the City's trail system (the first being the connection to the Bluff Creek Trail).
An at-grade pedestrian trail crossing is proposed at the Valley Ridge Trail North/Osprey Lane
intersection. Other pedestrian crossing locations were also evaluated however the Valley Ridge
Trail North crossing location appears to be the best location because it:
. Provides the best trail connectivity, in particular to the north.
. Is anticipated to be were most pedestrians would want to cross based on destination.
. Good sight lines for vehicles to see the crossing.
If sufficient pedestrian traffic exists, a mid-block crossing location with refuge island could be
considered in the future. Depending on the actual pedestrian routes, future consideration could be
given to a crosswalk being located on the south side of Heron Drive, since it is "shadowed" by the
southbound left turn lane. Also, it is legal for pedestrians to cross at any intersection with either a
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Paul Oehme
Audubon Road Street Reconstruction Project
January 25, 2010
Page 3
marked or unmarked crosswalk. If residents feel more comfortable crossing at another intersection,
they can cross at a different location.
A small area of land will need to be acquired at the south end of Audubon Road to accommodate the
trail. Most ofthe acquisition is planned to be temporary construction easements. The appraisals for
the property are almost complete. Some small trees and brush will need to be removed. Staffwill
work with the property owners on a landscape plan as part of this project.
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 for the 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 Y4 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 curb and to direct the roadway runoff to the catch
basins.
A box culvert for Bluff Creek is located at the southern end. of the 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 be assessed back 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.
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Paul Oehme
Audubon Road Street Reconstruction Project
January 25,2010
Page 4
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 of the utility poles would need to be relocated with this project. A petroleum pipeline crosses
under Audubon Road near Valley Ridge Trail South. The road is proposed to be lowered
approximately ~ footat this location. Staffhas been in contact with this utility company regarding
this project.
Street Lighting
Additional intersection street lights are proposed at the Osprey, Valley Ridge Trail South and
Sunridge Court for safety. No additional street lights are proposed along the corridor at this time.
Residential Feedback and Concerns
A neighborhood open house for the residents proposed to be assessed was held on December 2,
2009. Approximately 12 residents representing seven properties attended. The following
summarizes the residents' questions/issues:
. Audubon Road is a neighborhood road and should not be constructed as proposed.
. Why is the road proposed to be widened? Can't it remain the existing width?
. The speed limit is too high. Can it be lowered?
. Why is the City proposing a trail from Valley Ridge Trail North to Lyman Boulevard?
. Why is the trail proposed on the west side?
. Can the proposed pedestrian trail be moved to another location?
. Who will maintain the trail and pick up the trash?
. What is the traffic volume?
. There is too much truck traffic is on Audubon Road. Can trucks be prohibited?
. We want an all-way stop at the Valley Ridge Trail North/Osprey Lane intersection.
. Will trees be removed?
. Will street lights be installed?
. Will a traffic light be installed at the Lyman Boulevard intersection?
. Will I have access to my property during construction?
. Can the overhead utilities be buried?
A second open house was held on January 13,2010. Notices were mailed to residents ofthe Valley
Ridge neighborhood and property owners adjacent to the project corridor. An ad was placed in the
Chanhassen Villager inviting the general public to the open house. Approximately 40 or 50
residents attended. The concerns were similar to those brought up at the December 4, 2009 open
house. A project summary sheet with common questions and staff comments to the questions were
distributed at the January 13,2010 meeting and is also attached to this background. This
information is also posted on the City's website.
The two biggest concerns staff heard from the residents was the posted speed limit is too high and
the amount of truck traffic. The speed of Audubon Road is posted 45 mph and is not planned to
change. The Minnesota Department of Transportation sets the speed limits for public streets. It is
unlikely the State of Minnesota would lower the speed limit because it is not anticipated this corridor
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Paul Oehme
Audubon Road Street Reconstruction Project
January 25,2010
Page 5
would meet the requirements for lowering the speed. Staff is planning to meet with state officials to
discuss this issue. Audubon Road is a MSA (Municipal State-Aid) route and truck traffic is
accommodated on these types of roadways. The 2030 Comprehensive Plan designates Audubon
Road as a Collector Roadway. There is no way to completely stop truck traffic from accessing this
route due to the configuration of the road. Staff could contact the businesses along Audubon Road
to discuss truck routes and traffic. Staff took traffic counts on August 10,2009 which indicate 3%
of the traffic is made up of 3-axle vehicles or large.
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. To compensate for this difference, 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
The following graphic illustrates the proposed assessment methodology and estimated unit
assessment:
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Paul Oehme
Audubon Road Street Reconstruction Project
January 25, 2010
Page 6
If Audubon Road were a
local street, there would
be 90' wide lots on each
side of the road..
This section of Total Estimated Project Cost
Audubon Road is
~4,250 feet long, or $2,7.60,000
8,500 frontage feet
.
I Estimated Cost, 31' wide road Oversizing Cost Paid
:.:. $1,485,600 by City
>
.'. 8,~OO frol1t~~efe~t ....... $1,274,400
.+9QJrontage feet/unit
>, 0' .."0 ."
=94.4 as~essll1ent units I~ 40% typically 60% Paid by City
assessed
. $594,240 $891,360
$594,240 + 94.4 Total amount Amount paid by the City:
assessment units = .
$6,295/unit .. assessed:
$594,240 - $50,360
$6,295 x 8 units = = $543,880
$50,360
. iF
~
Total Amount Paid by the City:
$1,274,400 + $891,360 + $543,880 =
$2,709,640
SCHEDULE
The anticipated project schedule is as follows:
Public Hearing
Approve Plans & Specifications; Auth. Ad for Bids
Bid Opening
Neighborhood Meeting
Assessment Hearings/Award Contract
Start Construction
Substantial Construction Complete
Final Wear Course Complete
February 8, 2010
March 8, 2010
April, 2010
April, 2010
May, 2010
May, 2010
August 27,2010
June, 2011
A copy of the feasibility report is available in the Engineering Department for review.
Public hearing notices will be mailed to property owners by January 27, 2010 if this item is
approved.
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Paul Oehme
Audubon Road Street Reconstruction Project
January 25, 2010
Page 7
RECOMMENDATION
Based upon the analysis completed as a part of this report, the proposed Audubon Road Street
Reconstruction Project No. 10-02 is feasible, necessary, cost effective and will benefit the City of
Chanhassen.
Attachments: 1.
2.
CIP Pages
Project Information Summary
3.
4.
Powerpoint Slides
Resolution
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Capital Improvement Program 2010 thru 2014 Department Street hnprovements ~d.
City of Chanhassen, MN Contact Paul Oehme
Project # ST-022 Type hnprovement
Useful Life
Project Name Audubon Street Project Category Streets/Highways
i:
Account #1 Account #3 Priority n1a
Account #4 - -,..
Account #2
Total Project Cost: $3,000,000 ,
Description I I
Annual project to rehabilitate and reconstruct streets in the City. i
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2010 - Audubon Road Lyman Blvd, to Lake Drive West
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:
I
Justification I
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 ofthe street is necessary. A feasibility study is written to consider the
merits ofthe project and scope of work.
Expenditures 2010 2011 2012 2013 2014 Total
I
Construction 3,000,000 3,000,000 !
Total . 3,000,000 3,000,000 I
Funding Sources 2010 2011 2012 2013 2014 Total
GO Bonds 3,000,000 3,000,000
Total 3,000,000 3,000,000
Budget Impact/Other I
This project may decrease maintenance costs.
,
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CITY PROJECT 10-02: AUDUBON ROAD RECONSTRUCTION (Lake Drive to Lyman Boulevard)
Project Information
The project would reconstruct Audubon Road from Lake Drive West to Lyman Boulevard.
The proposal includes the installation of turn lanes, concrete curb and gutter and storm
sewer. Intersection lighting is planned as a safety improvement. A 10-foot wide bituminous
trail is proposed to be constructed on the west side from Valley Ridge Trail North to Lyman
Boulevard.
General Questions Received About the Project
1. Will Audubon Road be wider?
);> In most segments of the roadway the proposed design will be about the same width as the
current width when the gravel shoulder is included. Proposed left turn lanes at some
intersections would increase the width.
2. Why is the City proposing a trail on this segment of road?
);> The trail on Audubon is proposed for construction to complete an important missing link in the
Cities Trail System. The 2030 Comprehensive plan identifies this segment as a key pedestrian
connector within the community. Upon completion anticipated uses 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. .
3. Why is the City proposing to construct the trail on the west side of Audubon Road when the trail
is stubbed on the east side?
);> Several factors have lead to this recommendation. If the trail would be extended on the east, a
significant stand of mature trees would need to be removed, extensive grading would be
necessary and a retaining wall would need to be constructed. A driveway would also need to
be relocated or replaced to accommodate the trail. Additional permanent easement would also
be required. Installing the trail on the west side ofthe road utilizes a superior trail corridor,
requires significantly less fmancial investment and puts the trail on the side of the road with the
densest residential development. These residents will benefit by being afforded a second
convenient access to the Cities trail system (The first being the connection to the Bluff Creek
Trail).
4. Can the Audubon Road pedestrian trail crossing at Valley Ridge North be moved to Valley
Ridge South?
Valley View Ridge Trail North
· Provides the best trail connectivity, in particular to the north.
. Minimizes pedestrian travel to cross Audubon Road.
. Good sight lines for vehicles to see the crossing.
. Pedestrians have a wider roadway to cross (through and turn lanes).
Valley View Trail South
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. Crossing on the north side would provide a pedestrian refuge ("shadowed" by the northbound
left-turn lane).
. Less pavement for pedestrians to cross.
. Additional construction costs and private property acquisition.
. Concern about sight lines, driver's ability to see the crossing.
. It is legal for pedestrians to cross at any intersection with either a marked or unmarked
crosswalk.
Recommendations:
. The proposed crosswalk location at Valley Ridge Trail North provides the best trail
connectivity and travel distance.
. If sufficient pedestrian traffic exists, a mid-block crossing location with refuge island could be
considered in the future due to the vehicular speeds.
. Depending on the actual pedestrian routes, future consideration could be given to a crosswalk
being located on the south side of Heron Drive, since it is "shadowed" by the southbound left-
turn lane.
5. Who will maintain the area around the trail and pick up the trash if the trail is constructed?
~ The Cities Trail System is maintained by our Public Works Division. Maintenance activities
include mowing, sweeping and snow removal. The City coordinates trash collection along
roads through local volunteers, community service workers and sentenced to service workers.
6. Does the City know how much vehicle traffic uses Audubon Road?
~ Traffic counts were taken by the city on August 10, 2009 and show 3,200 trips per day. The
state counts for 2009 show 2,900 trips per day.
7. How much truck traffic is on Audubon Road?
~ The August 10, 2009 traffic counts that were taken indicate 3% ofthe traffic is made up of 3
axle vehicles or large.
8. Can truck traffic be discouraged from using Audubon Road south of Lake Drive West?
~ Audubon Road is a MSA (Municipal State-Aid) route and truck traffic is accommodated on
these types of roadways. The 2030 comprehensive plan designates Audubon Road as a
collector Roadway. There is no way to completely stop truck traffic from accessing this route
do to the configuration of the road.
~ Some solutions may include:
1. Provide a more convenient route for the truck traffic. Logistically, businesses are going
to select the shortest/fastest routes to transport their goods.
11. Staff could contact the businesses to discuss truck routes.
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9. Can stop signs be installed at all the intersections?
All-way stop control warrants are found in .the MnMUTCD (Minnesota Manual of Uniform Traffic
Control Devices). While there are several criteria, the main criteria include safety and operations of
the intersection. In this situation, the following can warrant All-Way stop control:
. Four crashes within a 12-month period which would be correctable by all-way stop control (right-
turn, left-turn and right angle crashes)
. Minimum Traffic Volumes
o 210 vehicles per hour on Audubon Road for eight hours and 140 vehicles per hour on the cross-
street for the same hours
. Other criteria as determined in an engineering study (sight distance, etc.)
Crash data was reviewed for the past five years. The following are the number of reported crashes in
the Mn/DOT database:
. Lake Drive: 3 crashes (three right angle, all were property damage only)
. Huron Drive: 2 crashes (one rear-end, property damage only; one ran-off road non-incapacitating
injury)
. Valley Ridge Trail North: 1 crash (ran-off road, property damage only)
. Valley Ridge Trail South: 0 crashes
. Sunridge Court: 0 crashes
Unwarranted All-Way Stop Control:
· Unwarranted installation can actually cause more safety and operational problems even though
done with good intensions. The following are some [mdings from studies about installing
unwarranted All-Way Stop Control.
· All-Way Stops do not control speeds. In fact, speeds typical increase away from the intersection.
Other elements should be considered to calm traffic speed if that is the real concern.
· Stop compliance is poor at unwarranted all-way stop control intersections.
· Safety of pedestrians can actually decrease, because pedestrians expect vehicles to stop while
vehicles become accustomed to "running" the unnecessary/unwarranted stop sign because they
never "stop" for cross-street traffic.
· T~e city may incur high liability exposure by ''violating'' the MnMUTCD.
Recommendations:
· Based on the MnMUTCD none of the intersections in the project area are recommended be
controlled by all-way stop control. ~:
. In the future at the Lake Drive West intersection could have improvements made to calm the traffic
in this area if warranted.
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, ))
10. Will trees need to be removed?
~ A few trees will need to be removed along the corridor especially in the temporary easement
locations at the south end of the project. Trees will be replanted in the temporary easement
locations.
11. Will street lights be added along Audubon Road?
~ Additional intersection street lights are proposed at the Osprey, Valley Ridge Trail South and
Sunridge Court for safety.
12. Will I have access to my property during construction?
~ Access will be provided to your property during construction. Audubon road however will be
closed to through or none local traffic.
13. Can the overhead utilities be buried?
a. Xcel has indicated that the utility power lines cannot be buried because of the size of the line.
The power poles may need to be relocated.
14. Proposed Project Schedule
The following is a tentative schedule if the project moves forward:
Next Nei hborhood Meetin January 13,2010
Public Hearin February 8,2010
Bid Openin A ril,201O
Assessment Hearin Award Contract May, 2010
Start Construction (Last day of School: June 10) Mid-June
Substantial Completion End of Au st
g:\eng\public,--2010 pre]~cfs\10::02 audubon road imp\meeting summary answers rev 1.docx
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LEGEND
PAVED ROADWAY
PAVED SHOULDER
DRIVEWAY ENTRANCE
RAISED MEDIANS & CURBS
BITUMINOUS TRAILS
CONCRETE TRAILS & SIDEWALKS
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PROPOSED PONDING LOCATION
ACCESS CLOSURE
EXISTING RIGHT OF WAY
PROPOSED RIGHT OF WAY
CONSTRUCTION LIMITS
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CITY OF CHANHASSEN
CARVER AND HENNEPIN COUNTIES, MINNESOTA
DATE:
January 25. 2010
RESOLUTION NO:
2010-
MOTION BY:
SECONDED BY:
A RESOLUTION ACCEPTING FEASIBILITY STUDY; CALL PUBLIC HEARING
FOR THE AUDUBON ROAD STREET RECONSTRUCTION PROJECT NO. 10-02
WHEREAS, pursuant to resolution of the Council adopted November 9, 2009, a report has
been prepared by the Engineering Department Staff with reference to the above-referenced project,
and this report is being received by the Council on January 25,2010, 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 property for all or a portion of the cost of the improvement pursuant to
Minnesota Statutes, Chapter 429 at an estimated total cost of the improvements of $2,760,000.
2. A public hearing shall be held on such proposed improvement on the 8th day of February, 2010
for the Audubon Road Street Reconstruction Project No. 10-02 in the Council Chambers of City
Hall at 7:00 PM and the clerk shall give mailed and published notice of such hearing and
improvement as required by law.
Passed and adopted by the Chanhassen City Council this 25th day of January, 2010.
ATTEST:
Todd Gerhardt, City Manager
Thomas A. Furlong, Mayor
YES
NO
ABSENT