6 Construct TH 101 Trail North CITYOF
690 Cio, Center Drive
PO aox i47
',hanhassen, Mi, nesota 55317
Phone
952. 937.1900
General?ax
952.937.5739
E, gh~eering Deparonent Fax
952.937.9152
Building Department Fax
952.934.2524
Web Site
wwtc:ci, cha,hasse,.m,.,s
MEMORANDUM
TO:
Todd Gerhardt, City Manager
FROM:
DATE:
Teresa J. Burgess, Public Works Director/City Engine~ ~/(t7 '
w\.TM
January 9, 2002
SUBJ:
Public Hearing - Feasibility Study on Highway 101 Trail
Construction, North of Highway 5 - Project 97-12-3
Requested Council Action
Hold the public hearing for the trail adjacent to Highway 101, north of
Highway 5.
This public hearing is intended to discuss the trail only. The Trunk Highway 101
Tumback is a separate project and is not being considered this evening.
Discussion
The feasibility study for the trail was received in December of 2001. Tonight is
the scheduled public heating for the trail.
Staff is recommending that Council hold the public heating, but wait until
January 28, 2002 to' take action to adopt the study and authorize preparation of
plans and specifications.
This delay will allow additional time for public comment to be received. Any
written comments received by 4:30 p.m., Thursday, January 24, 2002 would be
included in the January 28,2002 staff report.
This project is proposed to be funded through a $500,000 grant from the
Minnesota DNR and $800,000 from the City Budget.
Attachment: 1. Feasibility Study.
2. Letter to property owners adjacent to Trail.
c: Representative Tom Workman
G :XENGXP UB LIC\97-12-3Xstaff report-01 - 14-02.doc
~itv of Chanhasse,. A ~rowi, g co,mm,in, with c/ea, lakes, aua/in, sc/~ools, a cha~mi,.~ downtown, thrivi,.~ busi, esses, and beautiful oarkt A ~reat o/ace to live. work. and o/m:
CI I SEN
Feasibility Report
HIGHWAY 101 TRAIL PROJECT
CITY PROJECT NO. 97-12-3
Prepared by:
~'I1T Engineering,Surveying
PO Landscape Architecture
7510 Market Place Drive
Eden Prairie, Minnesota 55344
952-829-0700, 952-829-7806 fax
November 14, 2001
CITY OF CHANI-{ASSEN
NOV 1 ~ tO01
ENGINEERING DEPT,
City of Chanhassen, MN
Highway 101 Trail
HTPO, Inc.
Hansen Thorp Pellinen Olson, Inc.
Highway 101 Trail
City Project No. 97-12-3
A Feasibility Report
For
The City of Chanhassen, MN
November 26, 2001
Prepared by:
Tl-i"
Engineering · Surveying
Landscape Architecture
I hereby certify that this report was prepared by me or under my direct supervision and
that I am a duly registered Professional Engineer under the laws of the State of
Minnesota.
Reg. No. Date:
City of Chanhassen, MN
Highway 101 Trail
HTPO~ Inc.
Hansen Thorp Pellinen Olson, Inc.
TABLE OF CONTENTS
Page No.
CERTIFICATION -
TABLE OF CONTENTS --
INTRODUCTION 1
EXISTING CONDITIONS 1
PROPOSED TRAIL 2
Trail Surface 4
Permits/Approvals Required for the Proposed Trail 4
Americans With Disabilities Act (ADA) 5
Proposed Easement Acquisition 5
Future Maintenance 5
PROJECT COSTS 6
PROJECT FUNDING 7
CONCLUSIONS AND RECOMMENDATION 7
Appendix A - Project Maps with Trail Locations
Appendix B - Drainage Study
Appendix C - Estimated Construction Costs
Appendix D - Proposed Project Schedule
City of Chanhassen, MN
Highway 101 Trail
HTPO, Inc.
Hansen Thorp Pellinen Olson, Inc.
Engineering · Surveying
Landscape Architecture
Introduction
This report has been prepared to determine the feasibility of constructing a minimal
impact trail along Highway 101 in Chanhassen, Minnesota from Pleasantview Road to
West 78m Street.
On July 7, 2000, HTPO Inc. submitted conceptual plans and a report to the City of
Chanhassen. The primary objective during the development of this concept plan was to
provide a trail with minimal impact to residential properties and the environment.
During the process of preparing the conceptual plans the City Engineer and HTPO staff
met with property owners adjacent to the proposed trail. There were a variety of
alternate routes presented. The options proposed routed the trail alignment away from
the right of way and through adjacent neighborhoods. Residents were encouraged to
comment on the proposed trail and the alternate routes. As a result of these meetings
the preliminary concept plans were revised wherever possible to incorporate their ideas
and concerns.
In addition to communicating with residents, conceptual plans were sent to Hennepin
County and Carver County for their review and comment. The County representatives
did not feel they had jurisdiction to provide comment at the time.
The trail concept plans were also forwarded to the Minnesota Department of ~
Transportation (MnDOT). Along with the concept plans, a Limited Use Permit (LUP)
application was sent to MnDOT, for the authorization to construct a trail within the
Highway 101 right-of-way. MnDOT denied this permit, in a document sent to the City
Engineer on November 20, 2000.
The City Council authorized the preparation of this Feasibility Report on August 27,
2001.
Existin;I Conditions
Highway 101 lies along the border between Chanhassen (west side) and Eden Prairie
(east side). The developments along both sides of the road consist of single and multi-
family residential properties. Although some of the homes along the west side of the
highway have direct access, most of the homes adjacent to Highway 101 have their
backyards and side yards facing the road.
The existing Highway 101 roadway is predominantly a two-lane, rural section, with
ditches and culverts at driveways. The current speed limit along this stretch of highway
is posted at 45 mph. Bituminous curb has been added to the roadway edge in a few·
places along the project length, specifically at turn lanes. Some areas appear to have
City of Chanhassen, MN
Feasibility Report
Highway 101 Trail
Page
HTPO~ Inc.
Hansen Thorp Pellinen Olson, Inc.
Engineering · Surveying
Landscape Architecture
existing drainage and erosion problems, and complaints were received from some of the
property owners at the neighborhood meetings regarding these issues. Appendix B of
this report provides greater detail of the existing drainage conditions along the proposed
trail corridor.
In addition to the existing drainage ditch along the proposed trail, there are wetland
areas, existing trees, retaining wags, entrance monuments, utility poles, utility boxes,
buried utility lines, signs, mailboxes, and fences. Also along the west side of the
highway, within the project area, are seven (7) local street crossings and about.fourteen
(14) private driveway crossings.
The centerline of Highway 101 generally follows the easterly line of Section I and 12.
The width of the west half of the right-of-way varies from 33 feet to 40 feet to 50 feet.
The southerly segment of the right of way, which runs southwesterly from the highway
curve at Hill Street, was formerly a railroad right-of-way. Most of the right-of-way has
been dedicated to the public by subdivision plats. Five parcels of land adjacent to the
highway right-of-way have not been included in any subdivision plat, and easements
may be required.
Proposed Trail
The eight foot (8') trail alignment, as proposed, will meander within or near the
Highway 101 right-of-way, along the west side. Although a ten-foot (10') wide trail was
evaluated, it was felt an eight-foot (8') wide trail would have less impact on the
environment and to the neighboring residents. The trail aligmnent was chosen carefully
to minimize impacts to the environment and to the neighboring residents, and yet
provide a safe location for the trail in relation to Highway 101. Based on the ahgnment
as presented for the trail, the majority of the trail construction will occur within the
MnDOT right-of-way of Highway 101. The right-of-way is currently under MnDOT
jurisdiction.
MnDOT has indicated they are concerned with the placement of a trail within the right-
of-way, prior to the reconstruction of Highway 101. The two primary concerns they
have are the drainage impacts and the safety impacts. As part of this feasibility report, it
will be demonstrated that the trail can be installed prior to the improvement of the
highway, and that some of the current drainage and safety problems associated with the
existing highway can be improved as part of the trail project.
Existing safety problems along the highway include areas where guardrails have been
previously damaged. These guardrails should be replaced, with or without a trail. As
part of the trail project, it is recommended that these guardrails be replaced because they
may no longer provide the protection required during an accident. In addition to
replacing existing guardrails, new guardrails will be installed to reduce the likelihood of
City of Chanhassen~ MN
Feasibility Report
Highway 101 Trail
Page 2
HTPO~ lnc,
Hansen Thorp Pellinen Olson, Inc.
T17
Engineering · Surveying
Landscape Architecture
a vehicIe leaving the roadway during an accident. In addition to providing additional
safety for users of the trail, they would also provide improved safety for those using the
highway.
A specific example of an area with existing safety problems is near the intersection of
Hill Street and Highway 101. This access to Highway 101 does not line up with Twilight
Trail, which is located on the other side of the highway. Highway 101 has a curve in the
road in this area, and shrubs and other landscaping on the west side of the road have
created a site distance problem. This area is also the most difficult area for constructing
the trail. On the west side, north of Hill Street, steep slopes extend down to a residential
property with a driveway and a poor drainage system at the bottom. The guardrail in
this area is heavily damaged, and should be replaced. During the final design of the
project, the following items may be options for improving the existing safety problems
of this area, and yet allow for a safe trail within the right-of-way:
1. Install retaining walls along the steep slope to help stabilize it, and to provide an
area for the trail;
2. Close the existing Hill Street access to Highway 101;
3. Enlarge the turn-around at the end of Hill Street;
4. Remove the shrubs at the inside of the Highway 101 curve to improve site
distance
5. Install a better drainage system for the area; and
6. Remove and replace the existing damaged guardrail closer to the existing road
pavement.
A majority of these improvements would help safety along the roadway, with limited
additional safety for the users of the trail. They are being proposed to I~elp improve the
existing safety problems associated with the road.
In all areas where the trail is proposed to be within ten feet (10') of the existing highway,
a physical delineator will be proposed between the trail and the highway. These
delineators include guardrail, curbing, a vertical elevation differential, or a combination
of these items. Also, in areas with adjacent slopes steeper than 4:1, or a vertical drop of
more than 30 inches, railings and fences will be considered to improve safety for those
using the trail. Along the entire trail, the slopes shall be designed no steeper than 3:1
(horizontal: vertical). Areas that would require a steeper grade will be installed with a
retaining wall and fencing along the trail. In addition, the guidelines set fourth in the
Americans with Disabilities Act will be implemented into the final construction plans, to
provide accessibility to more users.
As part of the concept plan, it was proposed to construct a 150-foot segment of trail with
a width of only 3 feet (3'). This narrow section was proposed because of an existing
retaining wall within the MnDOT right-of-way, and because of the adjacent
City of Chanhassen, MN
Feasibility Report
Highway 101 Trail
Page 3
HTPO~ Inc.
Hansen Thorp Pellinen Olson, Inc.
il?
Engineering, Surveying
Landscape Architecture
homeowner's request to leave the exisSng retaining wall at its current location. MnDOT
has expressed concerns for tiffs proposal, and have suggested that a three-foot (S') karl
would not be accepted. As part of the final design of the segment, other options will be
evaluated, including moving the retaining wall to allow for an eight-foot (8') trail or
possible re-configuring or re-ahgning the existing highway to allow room for an eight-
foot (8') trail without moving the existing retaining wall. Other options may be
available, including a compromise where a six-foot (6') trail would be constructed by
moving the retaining wall to the right-of-way line. This alternative would not require
additional right-of-way.
Although safety is the primary reason the LUP apphcation was denied by MnDOT,
drainage issues are also a concern from MnDOT. Generally, the concerns are for the
impacts the proposed trail will have on the drainage ditch, and with the impacts the trail
will have on existing wetland areas. Appendix B addresses these issues; along with
proposed measures to reduce or eliminate the impacts the trail will have on them.
Another challenge for the trail project along the highway is the number of existing
utilities within the trail corridor. Wherever possible, the final design will avoid
disturbing these existing utilities. When utihties need to be relocated, the project
contractor will be required to coordinate the relocation with the utility company. The
final construction plans shall show all existing utilities, based on information provided
by the utihty companies. Prior to construction, all private utility companies shall be
notified and invited to attend a pre-construction meeting. Before any construction
begins all existing utilities shall be located and identified in the field.
Trail Surface
Alternative surfaces were evaluated for the trail including rock, gravel, or pulverized
rubber. Because the trail will be designed to be in compliance with ADA requirements,
the surface should have a smooth surface. A bituminous surface will reduce the potential
for slipping on 'loose' materials such as gravel or rock, and wheelchairs can move more
freely on a hard smooth surface.
Future maintenance costs for the trail are expected to be less with a bituminous trail. The
surface, if not bituminous, would require resurfacing portions of the trail annually, and
after heavier rains. Also, plowing a rough surface is more difficult, and not as effective,
as with a smooth surface.
Permits/Approvals Required for the Proposed Trail
As part of the re-submittal for a Limited Use Permit, a more complete set of plans will be
forwarded to MnDOT, along with a copy of this feasibility report. The plans will
incorporate the drafting standards for plan drawings used by MnDOT, as requested by
MnDOT staff. The plans will also identify any MnDOT monuments found within the
project; also requested by MnDOT. Meetings between MnDOT, City staff, and the
City of Chanhassen, MN
Feasibility Report
Highway 101 Trail
Page 4
HTPO, Inc.
Hansen Thorp Pellinen Olson, Inc.
Engineering. Surveying
Landscape Architecture
project designers will be scheduled to work with them to further discuss the concerns
they have with the trail within the existing Highway 101 right-of-way. Working closely
with MnDOT to resolve their concerns will be an important part of the success of this
project.
It is expected that wetland mitigation will be required for this project. HTPO, Inc. will
work with MnDOT, which serves as the Local Government Unit (LGU) for wetlands
within their right-of-way. For wetlands outside the MnDOT right-of-way, the City of
Chanhassen is the LGU. In addition to MnDOT, HTPO, Inc. will work with City staff
and other agencies, including the Army Corps of Engineers, Minnesota Department of
Natural Resources, and the Soil and Water Conservation District Office, to work out a
wetland replacement plan for the project. Additional information regarding wetlands is
included in Appendix B.
Americans With Disabilities Act (ADA)
The City has applied for a matching grant through the Minnesota Department of
Natural Resources. In order to qualify for the grant the trail design must meet the
requirements of the ADA. The final design for the trail will include these requirements,
along with other features that are recommended along trails to help those that are
physically disabled. More specifically, the Council may want to consider placing rest
areas, with park benches, along the trail route to allow those using the trail an
opportunity to rest along the way. Three areas, which may be good locations for these
rest areas, are the following:
1. Near Station 4+00 (see attached drawings) in South Lotus Park.
2. Near Station 46+00, near an existing wetland area.
3. Near Station 73+00, near an existing wetland area.
The surface, slopes, and cross-slope of the trail shall be designed to meet the ADA
standards.
Proposed Easement Acquisition
The proposed trail will require easements. It is hoped that these easements will be
obtained through negotiations with each of the affected property owners. In areas
where the trail cannot be re-aligned and where easements cannot be obtained through
negotiations, obtaining the easements through eminent domain may be required.
Future Maintenance
Although MnDOT did not mention future trail maintenance in their response to the LUP
application, it is important to work with them to insure a plan is prepared regarding this
maintenance.
City of Chanhassen, MN
Feasibility Report
Highway 101 Trail
Page 5
HTPO, Inc.
Hansen Thorp Pellinen Olson, Inc.
Engineering, Surveying
Landscape Architecture
Because the trail will be a city trail located in the MnDOT right-of-way, future
maintenance will be the responsibility of the City of Chanhassen. Future maintenance
includes the following:
1. Controlling vegetation around the trail, by mowing the grasses adjacent to the
trail in the summer;
2. Plowing snow off the trail in the winter; and
3. Future patching/replacement, when needed in the future.
Because of the proximity of the trail to the highway, it is important to have a snow-
removal plan, so that the piling of snow does not interfere with the function and safety
of the trail and roadway. It may be desirable to wait to remove the snow on the trail
until after the highway is plowed. Following the removal of snow from the highway,
City workers will plow the snow from the trail, and pile it towards the west side of the
trail, away from the highway. Because of retaining walls and private property, some
areas will be required to have the snow hauled away and stored somewhere off-site. It
will be important that the snow from the trail does not get pushed back toward the
roadway.
The City would be responsible for any future repairs or replacement of the trail, as
required in the future. It may be necessary to have a maintenance agreement with
MnDOT, so that the maintenance responsibilities are more clearly defined.
project Costs
The following is breakdown of the estimated costs associated with the project:
Construction Costs
(See attached Appendix C for itemization of Costs)
Indirect Costs (Engineering, Administration, Financing)
Easement Acquisition Costs
Wetland Mitigation Costs
$ 960,000.00
240,000.00
65,000.00
10,000.00
Total Estimated Project Cost
$1,275,000.00
City of Chanhassen~ MN
Feasibility Report
Highway 101 Trail
Page 6
HTPO, Inc.
Hansen Thorp Pellinen Olson, Inc.
Engineering · Surveying
Landscape Architecture
Other items or alternatives can be considered by the City Council. These items are as
follows:
Estimated Added Costs to install Boardwalk
In place of Trail Through Wetland Areas $ 35,000.00
(Assumes that 50% of the wetland mitigation costs would be saved)
Estimated Savings if Trail was not designed
To meet ADA requirements
Added Cost for Screening using Trees and Shrubs
Along the trail route at selected properties
(6 trees, several shrubs, misc. landscaping)
Added Cost for Screening using a privacy fence
( $ 200,000.00 )
$ 4,000 per lot
$ 4,000 per lot
Project Fundinq
The funding for this project will come from two sources. A majority of the funding will
come from the City's Park Dedication Fund, for which $800,000 has been set-aside for
this project. The remaining amount, or $500,000, will come from the Minnesota
Department of Natural Resources matching funds grant, for which the City has applied
for, and it appears will be awarded to the City. For those residents wishing to have the
additional screening added between the trail and their homes, the City may want to
consider requiring those residents to sign a waiver, and have each resident who benefits,
pay for the additional screening. No other assessments are planned for this project.
Conclusions and Recommendation
The study concludes that the proposed trail is feasible, and that it causes minimal impact
to both the adjoining residential properties and to the environment. It is our
recommendation that a bituminous trail, meeting ADA requirements, be constructed
along the west side of existing Highway 101.
The Council should also consider the use of a boardwalk, in lieu of a filled area within
the wetland areas. The Boardwalk will have higher construction and maintenance costs,
but can provide less impact to the environment.
City of Chanhassen, MN
Feasibility Report
Highway 101 Trail
Page 7
HTPO~ Inc.
Hansen Thorp Pellinen Olson, Inc.
Engineering. Surveying
Landscape Architecture
A__12pendix
Appendix A
Project Maps with Trail Locations
Appendix B
Drainage Study
Appendix C
Estimated Construction Costs and Itemization of
Construction Items
Appendix D
Proposed Project Schedule
City of Chanhassen~ MN
Feasibility Report
Highway 101 Trail
Appendix
HTPO, Inc.
Hansen Thorp Pellinen Olson, Inc.
Appendix A
Project Maps with
Trail Locations
1
SANT~EW ROAD
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LOCATION MAP
CHANHASSEN, MINNESOTA
CITY OF
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Appendix B
Drainage Study
Appendix B
Drainage Study
Highway 101 Trail Feasibility Report
Project No. 00-071
Introduction
The trail improvements under consideration from Pleasantview Road to
West 78th Street, in Chanhassen, are proposed along the west side of
existing T.H.101. Existing conditions suggest the trail improvements
will have an impact on the existing drainage along the roadway, since
this area is currently used for handling a large portion of the runoff
from the existing roadway. The purpose for this drainage study is to
analyze the areas where special design features may be required with
the trail improvements, in order to minimize the drainage impacts to
the ditch and to downstream areas.
Prior to providing design features for the anticipated problem areas,
existing conditions along the proposed trail route will be examined, at
locations that have been identified as areas of special concern. These
areas were selected based on the information available, including:
drainage patterns, steep slopes, storm sewer, utilities, landscaping, and
areas that have had previous drainage problems.
The study will examine these selected areas, along with the affects the
trail may have on them. As part of this examination, the study will
provide alternative solutions to be considered during the final design of
the trail.
Existing Conditions
The following information provides a brief summary describing the
existing conditions for each of the drainage issues listed. This
information was gathered primarily through field surveys, visual
inspections of the site, as-built information, aerial photos, and
information provided by neighboring residents and the Minnesota
Department of Transportation (MnDC)T). Each item listed will be
T.H. 101 Trail Feasibility Report
Appendix B - Drainage Study
November 2001
Page B- 1 of B-6
addressed in the proposed conditions section, along with proposed
solutions to the problems anticipated with the trail construction.
Based on comments from MnDOT staff, there are existing drainage
problems associated with the current T.H. 101. Along with safety,
drainage is one of the major concerns raised by MnDOT in regards to
the proposed project. Ditch capacities, lack of adequate storm sewer
systems downstream, and erosion problems all appear to be existing
problems along the current roadway. As part of this project, the plan is
to: (1) identify the existing problem areas; (2) take precautions to insure
they do not become worse; and (3) where possible, use the project to
actually improve existing problem areas.
Erosion
Based on inspections along the proposed trail alignment, some areas
currently experience erosion. These areas have experienced previous
problems due to one or more of the following: inadequate downstream
facilities, poor turf establishment, steep slopes, and/or high runoff
rates.
Ditch Runoff Capacities
The runoff from the roadway and adjoining areas is handled primarily
through 'rural' ditch sections located on both sides of the roadway. The
ditch located on the west side of the roadway routes the water to low
points where the water is allowed to drain to areas west of the
roadway. Based on a review of the information available, very little of
the water on the west side of the road is routed underneath the
roadway to the east. There is also some water that is routed from the
east side of the road, to the west, through culverts and storm sewer
constructed under the road.
Some of the existing ditch areas are known to have drainage problems,
mainly because the ditch does not have the capacity to adequately
handle the runoff. These areas have experienced flooding and erosion,
due to the lack of capacity.
Ponding
There appears to be two small ponds on the west side of the road that
may be available for storm water discharge. In addition to these two
ponds, runoff is currently routed through the drainage ditches along
T.H. 101 Trail Feasibility Report
Appendix B - Drainage Study
Page B-2 of B-6
November 2001
the roadway to wetlands and other downstream waterbodies and,
ultimately, to Lotus Lake.
Storm Sewer
There is a limited amount of storm sewer pipe in the area that takes the
water from the ditches and the road, to the drainage areas and
waterbodies downstream. Almost all of the runoff is taken from the
road and ditch, and routed overland to downstream areas. Some of
these areas where overland drainage is used to handle the runoff,
erosion has occurred as described earlier.
Wetlands
Based on National Wetland Inventory maps, site reviews, and
comments from MnDOT, wetland areas do exist on the site, along the
preliminary trail aligmnent. The five general areas that appear to meet
the criteria for jurisdictional wetlands have been identified in the
following locations:
Station 2+50 to Station 3+50
Station 45+00 to Station 49+00
Station 69+00 to Station 73+00
Station 75+00 to Station 76+00
Station 90+60 to Station 91+80
Some of these areas may exhibit the characteristics of wetlands, but may
not be jurisdictional wetlands. They may be 'incidental' wetlands
created as a result of the installation of the roadway or as a result of the
grading associated with the housing developments along the roadway.
A wetland delineation and further research will be required to
determine which basins are jurisdictional wetlands.
Proposed Conditions
During construction, and after installation of the trail, the final design
will require features to minimize maintenance problems associated
with higher storm water rates in some areas, increased runoff volumes,
erosion, and lack of adequate water quality improvements. This section
of the report is for the purpose of providing solutions to existing
problems and for providing design features that could be incorporated
T.H. I01 Trail Feasibility Report
Appendix B - Drainage Study
Page B-3 of B-6
November 2001
into the final construction drawings, to minimize the anticipated
problems.
Erosion
Controlling erosion during construction shall be crucial to the success
of the project. Because of the proximity to Lotus Lake, erosiOn control
measures must be implemented and maintained at all times during the
construction phase, to minimize the sediment reaching Lotus Lake and
other downstream waterbodies. Also, other measures will be
incorporated into the design to help reduce sediment from reaching
these waterbodies after construction is completed. Routing the runoff
to existing water quality ponds, constructing additional ponding areas,
improving ground cover, providing energy dissipation, and other
measures will be incorporated into the final design.
In sununary, providing good turf establishment along the construction
corridor will minimize erosion, as will reducing the erosion forces
associated with concentrated flow at storm sewer outlets, and in areas
where overland runoff flows are concentrated.
A plan for reducing the erosion problems include the following:
1. Sod areas that are anticipated to experience medium runoff rates,
and in areas where it is anticipated that seeding will not be given
the opportunity to become established because of the washing
away of topsoil and seeding. Stake the sod on steeper slopes to
help stabilize the slope and prevent the sod from being washed
below.
.
,
In areas were runoff rates and volumes are greater, riprap may
be required to dissipate the water energy, and to prevent the
erosion of the underlying soils.
In areas with very steep slopes, a combination of bituminous
swales with inverted crowns, and riprap may be necessary to
prevent water from eroding the side slopes. The swales will
allow the water to reach the bottom of the slope where the softs
are more stable, and riprap used to dissipate the energy of the
water coming down the slope, preventing or reducing erosion.
T.H. I01 Trail Feasibility Report
Appendix B - Drainage Study
Page B-4 of B-6
November 2001
.
Where necessary, storm sewer pipe will be installed with an
apron and rip rap. The areas expected to have storm sewer are
in those areas that have very steep slopes, concentrated flows,
and other areas where it is anticipated that other methods of
erosion control will not work.
5~
Best Management Practices for erosion control will be incorporated
into the project, including scheduling of construction and turf
restoration to minimize the amount of time areas are left
exposed.
Ditch Runoff Capacities
Based on the information available, the existing ditch along the
roadway does not have the capacity to handle the runoff for larger
storm events, even without the addition of the trail improvements.
Several areas along the trail have been identified that do not have the
existing capacity. As part of the trail design, storm water modeling will
be completed for the project area to identify areas that will not have the
capacities to handle the stormwater runoff. These areas will require
additional design work to provide increased capacity for the
undersized ditch areas.
Ponding
Along the trail corridor, several sites were reviewed to determine
whether additional ponding could be provided for both rate control
and water quality. The area most likely to be available for additional
ponding is in the area west of the trail, between stations72+00 and
74+00. During final design, other areas will also be evaluated.
Storm Sewer
The storm sewer proposed for the project is shown on the drawings.
The proposed storm sewer is to help facilitate drainage in areas where
runoff rates will increase due to the trail, where current capacities are
inadequate, and in areas where overland drainage cannot be obtained.
During the design of the proposed storm sewer, consideration will be
given to future improvements to T.H. 101, to help minimize the re-
installation of these facilities in the future.
Wetlands
The proposed project is anticipated to impact wetland areas. However,
the project shall be designed to minimize these impacts. In order to
T.H. 101 Trail Feasibility Report
Appendix B - Drainage Study
Page B-5 of B-6
November 2001
minimize these impacts, the trail alignment will be revised where
possible, and the grades will be changed in order to minimize fill
sections. Also, it has been suggested that a boardwalk be installed in
locations to lessen the wetland impacts.
As part of this project, wetland delineations will be required for all
areas suspected of being wetlands. Coordination between all agencies
with jurisdiction of the wetland areas will be required with this project.
If wetland impacts cannot be avoided, mitigation will be required per
the requirements of the Wetland Conservation Act, the U.S. Army
Corps of Engineers, the Minnesota Department of Natural Resources,
and other agencies.
Sheet Drainage Across the Trail
During the final design of the trail, sheet drainage across the trail will
be avoided where possible. In areas Where it cannot be avoided, careful
consideration will be given to insure only a limited amount of water is
sheeted across the trail and that water does not pond along the edges.
At low points in the trail, it will be important to design a positive outlet
from the trail so that water does not pond onthe trail, especially in the
winter when it can freeze and become unsafe.
The trail improvements will impact the existing drainage along the
west side of T.H. 101. However, it is expected that with careful
planning and design, the negative impacts will be minimal, and an
opportunity exists to help improve some existing problems. Although
the trail increases the impervious area along the roadway, the project is
proposed to add ponding, better ground cover where poor ground
cover exists now, slope stabilization, and an improved storm water
conveyance system along the west side of the existing roadway.
T.H. 101 Trail Feasibility Report
Appendix B - Drainage Study
Page B-6 of B-6
November 2001
Appendix C
Estimated Construction Costs
Preliminary Cost Estimate
City of Chanhassen, MN
Highway 101 Trail Concept Plans
Project No. 97-12-3
DEMOLITION/RELOCATIONS
NO
1
2
3
4
5
7
8
9
10
11
DESCRIPTION
Mailbox Relocation
Sign Relocation
Retaining Wall Removal/Salvage
Remove CMP's
Remove Bituminous
Saw Cut
Relocate or Adjust Valve/Hydrants
Move/Adjust Light Poles
Remove Planters
Remove Existing Guard Rail
EST. QTY. UNIT UNIT PRICE
12 Each $150.00
15 Each $150.00
200 Sq. Ft. $1o.oo
300 Lin. Ft. $1Z00
720 Sq. Yd. $4.00
3500 Lin. Ft. $2_00
15 Each $1,500.00
4 Each $1,000.00
1 Lump Sum $1,000.00
300 Lin. Ft. $5.00
DEMOLITION/RELOCATIONS TOTAL
TOTAL
$1,800.00
$2,250.00
$2,000.00
$3,600.00
$2,880.00
$7,0O0.OO
$22,50O.00
$1,000.00
$1,500.00
$48,5~.00
[ SITE GRADING/RETAINING WALLS [
NO DESCRIPTION
12 Silt Fence
13 Common Excavation
14 Import Granular Fill
15 Clear and Grub Trees
16 Modular Concrete Wails
17 Fence
15 Raft
EST. QTY. UNIT UNIT PRICE
6000 Lin. Ft. $2.50
3000 Cu. Yd. $9.00
900 Cu. Yd. $14.50
125 Each $150.00
12000 SF $15.00
1500 Lin. Ft. $30.00
400 Lin. Ft. $75.00
SITE GRADING TOTAL
TOTAL
$15,000.00
$27,000.00
$13,050.00
$18,750.00
$180,000.00
$45,000.00
$30,0O0.00
$328,800.00
Highway 'lOl Trail Concept Plans
Chanhassen, MN
STORM SEWER
NO
19
20
21
24
26
DESCRIPTION
12"-18" CMP
12"-18" RCP
RCP Flared End Section
Catch Basin
Manhole
Riprap
Drain Tile
Pipe Bedding
EST. QTY. UNIT UNIT PRICE
800 Lin. Ft. $25.00
1200 Lin. Ft. $40.00
8 Each $700.00
10 Each $2,0430.00
5 Each $2,000.00
200 Tons $60.00
500 Lin. Ft. $11.00
730 Tons $11.00
STORM SEWER TOTAL
TOTAL
$20,000.00
$48,000.00
$5,600.0O
$20,00O.0O
$10,000.00
$12,000.00
$5,50o.oo
$8,030.00
$129,130.00
PAVEMENTS AND RESTORATION ]
NO
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
DESCRIPTION
Bituminous Curb
13618 Curb and Gutter
Traffic Control
Trail Signage
Type 3 Barricade
Class 5 Aggregate Base
3" Bituminous Wear Course, Type 4lA
Sod and Topsoil
Seed and Topsoil
Wetland Seed Mix
Erosion Control Matting
Bituminous Spillways
Guard Rail
Landscaping/Tree Replacement
Benches/Rest Areas
EST. QTY. UNIT UNIT PRICE
2500 Lin. Ft. $7.00
400 Lin. Ft. $13.00
I Lump Sum $50,000.00
I Lump Sum $5,000.00
4 Each $500.00
3000 Ton $15.00
1500 Ton $45.00
10000 Sq. Yd. $2.50
2.4 Acre $2,000.00
0.75 Acre $2,600.00
500 Sq. Yd. $11.00
2 Each $1,000.00
1400 Lin. Ft. $35.00
1 Lump Sum $75,000.00
3 Each $3,300.00
PAVEMENTS AND RESTORATION TOTAL
TOTAL
$t7,5oo.oo
$5,200.00
$50,000.00
$5,000.0O
$2,000.00
$45,000.00
$67,500.00
$25,00o.0o
$4,80o.00
$1,950.00
$5,500.0O
$2,000.00
$49,000.0o
$75,0oo.00
$9,900.00
$365,350.00
DEMOLITION/RELOCATIONS TOTAL
SITE GRADING TOTAL
STORM SEWER TOTAL
TRAIL CONSTRUCTION & RESTORATION TOTAL
SUBTOTAL
10% CONTINGENCIES
TOTAL
$48,530.00
$328,800.00
$129,130.00
$365,35O.OO
$871,810.00
$87,181.oo
$958,991.0
Highway t01 Trail Concept Plans
Chanhassen~ MN
Appendix D
Proposed
Project Schedule
Engineering · Surveying
Landscape Architecture
November 26, 2001
December 2001
January 7, 2002
January 14, 2002
January 14, 2002
March 25, 2002
March 25, 2002
April 8, 2002
June 1, 2002
October 15, 2002
Proposed Project Schedule
Highway 101 Trail
Chanhassen, Minnesota
Council Accepts Feasibility Report/Orders Public Hearing
Park and Recreation Board Meeting
Neighborhood Meeting
Public Hearing - Council Orders preparation of Plans and
Specifications
Council Authorizes proceeding with easement
negotiations and condemnations
Approvals/Permits from Minnesota Department of
Transportation
Easements Acquired
Council Approves Plans and Specifications/orders
Advertisement for Bids
Construction Begins
Construction Completed
November 2002 Assessment Hearing (If Chap. 429)
CITY OF CHANHASSEN
AFFIDAVIT OF MAILING NOTICE
STATE OF MINNESOTA)
) SS.
COUNTY OF CARVER )
I,- Karen J. Engelhardt, being first duly sworn, on oath deposes that she is and was on
January 8, 2002, the duly qualified and acting Deputy Clerk of the City of Chanhassen, .
Minnesota; that on said date she caused to be mailed a copy of the attached notice of Public
Hearing on Feasibility Study for Highway 101 Trail from West 78th Street to Pleasant
View Road - Project No. 97-12-3 to the persons named on attached Exhibit "A", by enclosing a
copy of said notice in an envelope addressed to such owner, and depositing the envelopes
addressed to all such owners in the United States mail with postage fully prepaid thereon; that the
names and addresses of such owners were those appearing as such by the records of the County
Treasurer, Carver County, Minnesota, and by other appropriate records.
K_.9~Ien J. Eng:~ell3firdt, De~t~y Clerk
Subscribed and sworn to before me
this~'.q'~'~ day of "_.l~',,-~,.~a c,I ,200~
.--~it.~(., '---~- .Notary~P~lic
g:\eng\formsXaffidavit, doc
KlM T MEUWISSEN
.~-~.~ Notary Public- Minnesota
,~~ CARVER COUNTY
::~ My Commission Expires 1/31/20~5_ _~
January 14, 2002 PUBLIC HEARING NOTICE
CITYOF
CH H SEI
dP0 CiO, Center Drive
PO Box 147
Chan/~assen, Mimmota 55317
PhoIle
~52.~3Z ~00
Oneral F~r
952.937.5739
Engineering Dcarm~ent
952937.9152
Building Department
952934.2524
~Sb Site
Re:
Notice Of Public Hearing on Feasibility Study for
Highway 101 Trail from West 78th Street to Pleasant View Road
City Project No. 97-12-3
Dear Property Owner:
A Public Hearing has been scheduled for 7:00 lom or as soon thereafter as
possible on Monday2002 in the Citz Council Chambers at
Chanhassen City Hall during a regularly scheduled council meeting. The
hearing is your opportunity to voice your opinion directly to the City Council
before they make their decision whether or not to authorize the project.
In addition, the City Council will review written comments received by Thursday,
January 24th prior to taking action on this project on January 28th.
A copy of the feasibility study is available for review at City Hall during normal
business hours. The feasibility study discusses the approximate location and costs
of the project.
Please feel free to contact me with any questions or comments at 952-227-1169 or
by email at ~ci.chanhassen.mn.us.
Sincerely,
CITY OF CHANHASSEN
Teresa J. Burgess, P.E.
Public Works Director/City Engineer
C:
Representative Tom Workman
Mayor & City Council
gbeng',public\97-t 2-3\public hearing letter.doc
The Gt~, of Chanhassen. A g~v~'i~¢ co;mmmit~, with c/em,, lakes, m~,/io,, schooh, a cham~i,e downtown, th;'ivi,e bmi,esses, a,d beautihd om'ks..4 ereat o/ace to live. wo;'k, mtd
TH 101 Trail Public Hearing
Notification Area
W E
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