HomeMy WebLinkAbout4C - Ring Road Regional Pond
CITY COUNCIL AGENDA REPORT
DATE:
AGENDA #:
PREPARED BY:
SUBJECT:
May 7, 2001
4C
Bud Osmundson, Public Works Director
CONSIDER APPROVAL OF A RESOLUTION APPROVIN(;: (I)
THE CONCEPT PLAN FOR A REGIONAL POND FOR THE
RING ROAD AREA IN LIEU OF THE PLSL WD REQUIRED
PONDING ON THE CRYST AL CARE SITE; (2) THE
INCORPORATION OF THE POND DESIGN AND
CONSTRUCTION WITH CITY PROJECT NO. 01 - 01; (3) THE
USE OF WSB AND ASSOCIATES TO PERFORM THE
ENGINEERING FOR THE POND DESIGN AND
CONSTRUCTION.
DISCUSSION:
HISTORY
Previously this year the city council approved a feasibility report and
ordered the preparation of plans and specifications for the first phase of
the Ring Road project. This project is identified as City Project No. 01 -
01 and is in the approved 2001-2005 Capital Improvement Program.
As the council is aware, city staff has been working with the developers
of the proposed Crystal Care project and have received the preliminary
plat submittals for this project. The Crystal Care project will include
the construction of the eastern phase of the Ring Road between Franklin
Trail and the Borka property adjacent to the Park Nicollet Clinic. A
couple of months ago, Crystal Care representatives met with the Prior
Lake Spring Lake Watershed District (District) staff requesting District
requirements for their proposed project. The District's new rules would
have required extensive stormwater ponding on their site, and neither
city staff or Crystal Care representatives were happy with the site plan in
regards to ponding.
Staff then requested WSB & Associates to analyze the feasibility of a
regional pond for this area in lieu of each lot being responsible for their
own ponding, since any onsite ponding would affect the storm sewer
system design on the Ring Road. Staff initiated a meeting with District
staff to investigate alternatives to the ponding design for the Crystal
Care site. We cooperatively and tentatively agreed to a concept plan for
a regional stormwater ponding system on a county owned parcel in lieu
of the extensive ponding on the Crystal Care site which is feasible from
162~@'.€aWe'€r~e~oAw:;oS~€~,?"Prior Lake, Minnesota 55312-1714 / Ph. (612) 447-4230 / Fax (612) 447-4245
AN EQUAL OPPORTUNITY EMPLOYER
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an engineering perspective. The District requested that the City show
that we would move forward with the regional ponding concept.
The purpose of this item is ta have the Council approve the concept far a
regional pond in lieu of the District's required ponding on the Crystal
Care site, to incorporate the pond design and construction with the Ring
Road project, City Project No. 01 - 01, and to approve the use of WSB
& Associates to do the necessary engineering.
CURRENT CIRCUMSTANCES / ISSUES
Attached is the District permit application for the concept plan for the
regional ponding, which has already been submitted to the District. The
District asked that the City show that it is committed to this project
before they would allow Crystal Care to proceed without the previously
described ponding on the Crystal Care site. Hence, this agenda item
and resolution approving the concept plan.
The proposed pond will be on the corner of existing Panama A venue
(County Road 23), State TH 13, and Tower Street. This property is
currently a mixture of dump, overgrown brush, volunteer - weedy trees,
and wetland. It is currently owned by Scott County and was acquired as
tax forfeiture property. The existing site currently collects storm water
from areas east, west, and south of the site including overflaw from
Crystal Lake just south of 1 70th Street. This site drains north through a
culvert under TH 13 to a drainage ravine east of Creekside Circle and
west of Anna Trail, meandering northerly crossing under Priorwood
Street, then westerly through the Cates Street channel to Prior Lake. It
should be noted that this entire channel is proposed to be stabilized to
prevent erosion through two separate projects in the approved five year
CIP. The proposed pond will be designed with the existing culvert
under TH 13 as the limiting factor for flow. In other words, the channel
will not required to be upgraded in capacity.
The proposed regional pond will be designed to accommodate the
storm water runoff from areas east and west of the pond, including the
future CSAH 23, 170th St. and Tower Street improvements west of the
site, the County Market site and vacant parcel to the west of County
Market, the proposed Ring Road east of the site, the Crystal Care site
and the newly created lot just west ofthe Crystal Care site. This includes
the entire watershed which currently drains to this site. This pond will
act as a retention basin, water quality treatment basin, and infiltration
basin. The water currently coming from Crystal Lake will bypass the
proposed pond since it is considered relatively clean and does not
require treatment.
The estimated cost for the design, penmttmg, and constructing the
proposed regional pond is $100,000. The attached letter from WSB &
Associates shows their quote for the engineering services to be $7,500.
X:\Osmundson\RingRoad\Agenda Approve Reg Ponding Concept.doc
2
CONCLUSION
In summary, the proposed regional ponding is beneficial to the city and
to the developing areas such as Crystal Care. This pond construction
would need to be accomplished with the third phase of the Ring Road
project. The County has been working with us to give the tax forfeiture
property to the City which is where the ownership should be, since it
serves mainly the City. By constructing the pond with the Ring Road
project we will have a more efficient project and should see the benefit
of lower construction costs than a stand alone project. The proposed
pond construction will clean up the proposed site and improve the
aesthetics of the area. Finally, it will benefit the buildable lots in the
area which is an economic consideration or benefit to these parcels.
If the proposed resolution is approved, this project would be combined
with the previously approved Ring Road project. After the appraisals
for assessments are complete and the Council decides on it's course of
action in regards to assessments, this proposed ponding project and the
proposed assessments will need to be added to the previously approved
feasibility report prior to a public hearing on the project.
The council may recall that the city sponsored a similar regional pond
project north of CSAH 42 and west of Pike Lake Trail. The regional
ponding concept has worked well in this and we expect similar results
from the proposed Ring Road pond project.
FINANCIAL IMPACT:
The project is proposed to be financed by the trunk reserve funds since it
is a trunk facility, less any other possible funding sources that staff can
secure such as the County, Prior Lake Spring Lake Watershed District,
Municipal State Aid, MnDOT, or others.
The city collects trunk area charges from new development in lieu of
special assessments to pay for regional "trunk" storm water facilities
such as the proposed pond.
AL TERN A TIVES:
The alternatives are as follows:
1. Approve a Resolution approving: (1) the concept plan for a regional
pond for the Ring Road area in lieu of the PLSL WD required
ponding on the Crystal Care site and other sites; (2) the
incorporation of the proposed regional pond design and construction
with City Project 01-01; (3) the use of WSB & Associates to
perform the engineering for the pond design and construction.
2. Table the resolution for a specific reason.
3. Deny the Resolution.
X:\Osmundson\RingRoad\Agenda Approve Reg Ponding Concept.doc
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111
.
[ JI
RECOMMENDED
MOTION:
Staff recommends alternativ number one described above.
X:\OsmundsoJ1\RingRoad\Agenda Approve Reg Ponding Concept.doc
4
RESOLUTION 01-xx
RESOLUTION APPROVING: (1) THE CONCEPT PLAN FOR A REGIONAL POND
FOR THE RING ROAD AREA IN LIEU OF THE PLSL WD REQUIRED PONDING ON
THE CRYSTAL CARE SITE; (2) THE INCORPORATION OF THE POND DESIGN
AND CONSTRUCTION WITH CITY PROJECT NO. 01-01; (3) THE USE OF WSB AND
ASSOCIATES TO PERFORM THE ENGINEERING FOR THE POND DESIGN AND
CONSTRUCTION
MOTION BY:
WHEREAS,
WHEREAS,
WHEREAS,
WHEREAS,
WHEREAS,
WHEREAS,
WHEREAS,
SECOND BY:
The City Council has approved a feasibility report and ordered preparation of
plans and specifications for the construction of the "Ring Road" between the
intersection of Duluth Avenue and Tower Street, and the intersection of the "Ring
Road" and Toronto Avenue, City Project No.O 1 - 01, which the City intends to
construct in 2002; and
Crystal Care is proposing to construct an elderly care facility and the segment of
the Ring Road from the above described segment easterly to Franklin Trail in
2001; and
The Prior Lake Spring Lake Watershed District (District) rules require Crystal
Care to provide extensive storm water ponding on their site; and
The District, City and Crystal Care representatives met to discuss alternatives to
the extensive ponding on the Crystal Care site and concluded that a regional pond
would be in everyone's best interests; and
Scott County owns a site which will provide the regional ponding for the Crystal
Care project, and all phases of the Ring Road; and
The City Council has adopted the 2001 - 2005 Capital Improvement Plan which
outlines the funding for all phases ofthe Ring Road and is committed to
constructing all phases of the Ring Road by 2005; and
The City Council wants to encourage the growth of commercial business in the
City and concurs that the proposed regional pond will assist in this growth.
NOW THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF PRIOR LAKE,
MINNESOTA, that
1. The City Council hereby approves the concept for a regional storm water pond for the Ring Road
area in lieu of the District's required ponding on the Crystal Care site.
Agenda Approve Reg Ponding Concept
17073 Adelmann St. S.E., Prior Lake, Minnesota 55372 / Ph. (952) 440-9675 / Fax (952) 440-9678
AN EQUAL OPPORTUNIlY EMPLOYER
III
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2. The pond design and construction shall be incorporated into the Ring Road design, City Project
No. 01-01.
3. WSB & Associates is hereby authorized to perform the necessary design engineering for this
project for the amount of $7,500.
Passed this 7th day of May 2001.
YES
NO
Mader Mader
Ericson Ericson
Gundlach Gundlach
Petersen Petersen
Zieska Zieska
{ Seal }
City Manager
City of Prior Lake
Agenda Approve Reg Ponding Concept
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A
WSB
& Associates, Inc.
763.541.4800
763.541.1700 FAA
April 23, 2001
Mr. Paul Nelson
Prior Lake - Spring Lake Watershed District
18670 Franklin Trail SE -Suite 110
Prior Lake, ~1N 55372
Re: Permit Application for Ring Road Construction Project
WSB Project No. 1283-00
Dear Mr. Nelson:
Enclosed please fmd a permit application for the Ring Road Construction proje-..:t. This
project includes the construction of Ring Road and a regional stormwater treatment pond as
sho\Vll on the attached figures. This regional stormwater facility is proposed to be
constructed within an existing wetland located east of CSAH 23 between THl3 and TGwer
Street (see Figure 2). Outlined below, please fllld the information required by th~
PLSL WD for a permit under Rule D, Rille E, and Rille G for the Ring Road and regi:)a,tl
ponding site construction.
1. Stonnwater Treatment
The regional ponding area is anticipated to provide treatment and rate COnLiO! fer
Ring Road as well as future development within the subwatershed as shown on
Figure 1. This future development includes the TH 13/CSAH 23 interchange anti
the Crystal Care site. While it is anticipated that separate permits will be required
for the TH 13/CSAH 23 and Crystal Care project, information related to stormwater
ponding for these sites is included here for purposes of demonstrating the amount of
treatment that would be required.
As per the PLSL WD rules, dead pool from the runoff from a 2.5 inch-24 hour storm
event is required. The Ring Road, Crystal Care Center, and the TH 13/CSAH 23
interchange project is anticipated to generate 1.3 acre-feet of runoff from this event
thus requiring 1.3 acre-feet of dead pool storage for treatment. It is anticipated that
the proposed pond will provide between 3 to 4 acre-feet of dead water storage me.
therefore additional treatment will be available for future development. T!:e size of
the pond will be maximized to reasonably utilize the entire parcel. In addition, there
is potential to provide a separation between the water from the Crystal Lake Outlet,
which runs through the site, and the treatment pond.
Minneapolis. St Cloud. Equal Opportunity Employer
2. Stonnwater Rate Control
The storm water discharge rate from the eyisting outlet of the wetland is estimated a.t
113 cfs. This includes the immediate suhwatershed as well as the additional water
that is directed to the Crystal Lake ()utl~t and other areas that run through the
wetland. This rate win be verifi.ed b3.3ed un survey data for the area. The proposed
outlet for the ponding area will limit the discharge rate to existing conditions.
F:i WPWlMl 283-00\01230 J p11;h.Ii.''f'd
April 23, 2001
Page 2
3. Best Management Practices
The BMP's to be used during and after construction of Ring Road and the regional
pond include silt fence, bale checks, and seeding and mulching. Outlined below,
please fInd information regarding the use of BMP' s as required by the PLSL WD:
Vegetated swales: The use of vegetated swales is not possible for the construction of
Ring Road due to space limitations.
Pond outlets above groundwater: The proposed pond outlet is anticipated to be
above the groundwater elevation.
Roof drainage to pervious area: This BMP does not apply to the Ring Road
project.
Depressed casual storage areas: The proposed ponding area will provide storage
for much of the area. .
Minimization of the number and width of parking stalls: This BMP does not
apply to the Ring Road project. The design of Ring Road precludes on-street
parking.
Rural section roads with road width minimization: The City has considered this
option for Ring Road and has determined that since this is an urban area, a rural
section road is not feasible and would not be in-the public's best interest.
Mitigation of disrupted soils: Soil disruption will be minimized to the greatest
extent feasible. Because this is a road construction project, areas outside of the road
surface will receive minimal compaction.
4. InfIltration
Based on the PLSL WD Rules, the project must provide infIltration for the
impervious surface area created by the development for 0.5 inches of runoff. The
infiltration volume required by PLSL WD Rules for Ring Road and TH13/ CSAH 23
reconstruction proj ect is 0.16 acre-feet based on the 3.9 acres of increased
impervious surface. The surface area of the pond is anticipated to be approximately
2.0 acres. Using an infiltration rate of 0.03 inches/hour, the pond is anticipated to
provide 0.36 acre-feet of infiltration over 72 hours. Each buildable lot in the
watershed will also be required to provide infiltration, as is feasible.
5. Wetland Impacts
The proposed regional ponding area is anticipated to be located within a wetland.
The wetland delineation report is attached for your review. This is a Type 2,
F:I WP WIMI 283-001042301p/s/v.d. "1'd
April 23, 2001
Page 3
flowthrough wetland with the Crystal Lake Outlet channel running through it. The
wetland is primarily reed canary grass with a few shrubs. The wetland currently
provides stormwater storage and treatment and has been impacted by adjacent
residential and commercial disturbance. It is anticipated that this project will not
adversely affect the function and public value of the wetland.
The City is requesting approval of this application. If you need additional information or
have comments about the project, please feel free to call me at (763)287-7196.
Sincerely,
WSB & Associates, Inc.
b'm1/ad
Andrea Moffatt
Wetland Biologist
c: Bud Osmundson,P.E., City of Prior Lake,
F:\WPWlNlJ 283-001042 30Jplslwd. wpd
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PRIOR LAKE-SPRING LAKE WATERSHED DISTRICT
16670 Franklin Trail S.E., Suite 110, Prior Lake, MN 55372 (952) 447-4168, 447-4167 (fax)
PERMIT APPLICATION
PROJECT NAME
Ring Road Stonnwater Management Project
Name of Permittee Telephone #
City of Prior Lake - Bud Osmundson, P.E. (952) 447-9833
Authorized Agent
Dave Hutton, P.E.
Telephone #
(763) 287-7195
Permittee's Address (Steet, RFD, Box, City, State, Zip Code)
WSB & Associates, Inc. 4150 Olson Memorial Highway Minneapolis, MN 55422
Project Location (Township, Range, Section) and Address
Township 114N, Range 22W, Section 2
Project Legal Description (attach separate sheet if necessary)
PERMIT CATEGORY (check applicable types (s) as described in Permit Information Brochure)
. Public and Private Drainage Systems . Land Development Plan
o Bridge and/or Culvert Construction . Final Site Drainage Plan
PROJECT DESCRIPTION
Construct Ring Road with regional stonnwater treatment pond.
GENERAL CONDITIONS
I. The Penuittee grants to the Disuict, and its agents, employees, officers and contractors, a license to enter the Project to peIform any
inspections or work authorized by the Penuit or any applicable law. The license shall expire after acceptance of the work by the District and
Issuance of a Certificate of Completion.
2. The Penuittee shall indemnify, defend and hold the District and its agents, employees and officers hannless for all claims made by itself and
third parties for damages or loss sustained or costs incurred, including engineering and attorneys' fees, as a result of the issuance of the Penuit
or the construction of the Project
3. The Penuittee shall pay all costs incurred by the district to process and review the application for the Permit and to inspect and monitor the
activities authorized by the Penuit In addition, the Penuittee shall reimburse the District for all costs incurred in the enforcement of the
Penuit, including engineering and attorneys' fees. The Permittee shall fully pay all bills submitted to it by the Disuict within 7 days after
receipt Bills not so paid shall accrue interest at the rate of 8% per year.
4. The Penuittee shall obtain such easements as may be required for construction of the Project and provide in the fmal plat for the Project
utility and drainage easements acceptable to the District to protect all hydrologic features within the Project and to provide access for the
maintenance of the storm sewer facilities to be constructed pursuant to the Permit
5. To assure full compliance with the terms of the Permit, the Penuittee shall deposit with the Disuict a cash surety or irrevocable letter of
credit, in form and from a surety satisfactory to the Disuict, in the amount specified under the Special Conditions of the Permit
6. By acceptance of the Permit, Permittee acknowledges and agrees to peIform and be bound by all general and special tenus and conditions of
the Permit.
I hereby apply under District Rule B for a permit to complete the proposed project in accordance with the exhibits and other
information submitted with this Application and agree to the above general conditions.
C;:~Y-o/
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WSB
4150 Olson Memorial Highway
Suite 300
Minneapolis, MN 55422
Ring Road Regional
Treatment Pond
WSB Project No. 128:'>-011
Date: April 9, 2001
& Associates. lnt:.
763-541~800
FAA 763-541-1700
Prior Lake, Minnesota
Figure
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.WSB
&,Associates, Inc.
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763.541:4800 ..
763.541-1700 FAX
April 25, 2001
Mr. Bud Osmundson, P.E.
City of Prior Lake
Public Works Director
17073 Adelmann Street
Prior Lake Mn, 55372
Re: Ring Road Stormwater Pond
WSB Project No. 1283-01
Dear Bud:
We have reviewed your request to provide engineering services for the design of the regional
stormwater pond in association with the Ring Road project and would like to offer the following
proposed services:
· Wetland delineation = $2,000
(Includes delineation, survey, reports, and
permi tting)
· Full topographical survey of Property for = $2,500
pond design
· Design services (includes regional pond and = $3,000
Crystal Lake bypass)
Total = $7,500
As indicated, this regional pond would benefit both the Ring Road project and the Crystal Care
project, so these costs could be shared between the City and the developer.
Please contact me at (763) 287-7195 if you have any questions or comments on this proposal.
Sincerely,
David E. Hutton, P .E.
Proj ect Manager .
F:\WPWIN\ 1283-01 \042301-bo-ringroadstormwaterpond .doc
Minneapolis. St. Cloud. Equal Opportunity Employer