Interim Use Permit 2011-01 Recording Transmittal 01-28-2011CITY OF CHANHASSEN
PLANNING DEPARTMENT
7700 Market Boulevard
P.O. Box 147
CHANHASSEN, MN 55317
(952) 227 -1100 FAX (952) 227 -1110
TO: Campbell Knutson, PA
317 Eagandale Office Center
1380 Corporate Center Curve
Eagan, MN 55121
LETTER OF TRANSMITTAL
DATE JOB NO.
1/28/11 1 2011-01
ATTENTION
Sue Nelson
RE:
D ocumen t Recording
WE ARE SENDING YOU ® Attached ❑ Under separate cover via the following items:
❑ Shop drawings ❑ Prints ❑ Plans ❑ Samples ❑ Specifications
❑ Copy of letter ❑ Change Order ❑ Pay Request ❑
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1/24/11
11 -01
Interim Use Permit 2011 -01 Minnetonka Middle School West IUP
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COPY TO: Cliff Buhman, Inspec
Mike Condon, Minnetonka Schools
SIG
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CITY OF CHANHASSEN
CARVER AND HENNEPIN COUNTIES, MINNESOTA
INTERIM USE PERMIT #2011 -01
1. Permit Subject to the terms and conditions set forth herein, the City of Chanhassen
hereby grants an interim use permit for the following use:
Interim Use Permit to allow site grading for tennis courts based on the plans prepared for the
Minnetonka Middle School West.
2. Propert X . The permit is for property situated in the City of Chanhassen, Carver County,
Minnesota, and legally described as follows:
LEGAL DESCRIPTION
The Southwest Quarter (SW 1/4) of the Northwest Quarter (NW 1/4) of Section
Three (3), Township One Hundred Sixteen (116), Range Twenty Three (23) West,
according to the U. S. Government Survey thereof, excepting therefrom the
35/100ths acres conveyed by deed recorded in the office of the Register of
Deeds of Garver County, Minnesota, in Book 8 of Heeds, page 400, and that part
thereof conveyed by deed recorded in the office of the Register of Deeds of
Carver County, Minnesota, in Book 41 of Deeds, page 322, and sub to the
right, title and interest of the State of Minnesota in that strip of land conveyed
by deed recorded in the office of the Register of Deeds of Garver County,
Minnesota, in Book 33 of Deeds, page 25.
Also that part of Lot E. Bardwell Acres, not conveyed by said deed recorded in
the office of the Register of (deeds of Corver County, Minnesota, in Book 41 of
Deeds, page 322.
Sub*t to o permanent easement for roadway purposes as recorded in the office
of the Register of heeds of Carver County, Minnesota, in Book 64 of Deeds, page
32.
3. Conditions The permit is issued subject to plans dated December 3, 2010 prepared by
Inspec, and the following conditions:
a. Adequate sediment and erosion control practices must be installed prior to any earth -
disturbing activities.
b. All silt fence shall use metal t -posts and shall be consistent with City Detail Plate No. 5300.
Include detail on Sheet 5.
c. Rock construction entrance locations shall be shown on the plan and should be placed such
that construction traffic does not cross the proposed infiltration areas. Rock construction
entrances shall be consistent with City Detail Plate No. 5301. Include detail on Sheet 5.
d. Infiltration areas shall be protected from sediment deposition and compaction resulting from
construction equipment throughout construction. This must be noted on the plans along with
all other areas to be protected.
e. Category 3 erosion control blanket shall be used on all disturbed slopes with positive flow to
the pond unless sod is to be placed and staked.
The applicant is responsible for procurement of the NPDES General Permit to Discharge
Stormwater Associated with Construction Activity prior to any earth- disturbing activities. A
full SWPPP will need to be prepared and submitted to the City for review and approval prior
to any earth- disturbing activities. The SWPPP must include all components identified in
Parts III and IV of the permit.
g. Redundant erosion control measures shall be included at the two new inlets to the pond.
Floating silt curtain should be used at the more southerly inlet but a second line of silt fence
may be adequate at the other new inlet.
h. The infiltration design and maintenance shall be consistent with the 2008 Minnesota
Stormwater Manual; in particular Chapter 12 and Appendix D.
i. Protection must be provided to assure that construction equipment is not tracked over the
proposed infiltration areas, materials are not stockpiled in these areas and sediment
deposition does not occur in these areas. This is most commonly accomplished through the
use of silt fence. Further, this should be noted on the plan set, in the SWPPP and within the
project specifications manual.
j. Infiltration features must be separated from the ground water by a minimum of three feet.
Provide boring data to confirm this separation.
k. As the infiltrometer tests were performed approximately 60 feet west of the proposed
infiltration area and the infiltration rates are under the optimal conditions, and likely to
decline over time, a margin of safety shall be built into the design to account for a diminished
infiltration.
1. To assure that the area drains in 48 hours or less, the system shall be designed with an
underdrain and coarse aggregate storage as depicted in Appendix D of the Minnesota
Stormwater Manual — ` Bioretention /Infiltration/Filtration Facility ", page 723 of 885. This
would likely satisfy the above condition.
m. CBMH 1 shall be moved northerly on the site and lowered so that the rim elevation is below
1060 feet.
n. The applicant shall relocate to proposed drain tile outlet for the four most easterly tennis
courts. The new outlet shall be between the most southerly court and the next most southerly
court. This shall then be connected to CBMH 2 and the outlet for this manhole shall then be
sized accordingly.
o. A stable emergency overflow shall be provided from the easterly basin to the pond.
p. The applicant shall demonstrate how the filtration swales are to be vegetated. At a minimum,
fescues and/or other deep- rooted grasses should be used to promote infiltration.
q. The new outlet elevations are shown to be 1046 feet. It appears that the ordinary high water
level (OHW) is at 1045.4 and the normal water level (NWL) is at an unknown elevation but
likely at or around 1043.5. The newly proposed outlet shall be set at the NWL.
The applicant or their consulting engineer shall develop an operations and maintenance
manual for the infiltration /filtration features and that this includes some type of vegetative
filter to provide pretreatment of the water entering the system.
s. The applicant shall provide a security in the amount of $4,000 to guarantee erosion control.
t. The applicant shall verify that the tennis courts are outside any easements and meet the 15
foot side yard setback.
4. Termination of Permit The City may revoke the permit following a public hearing for
violation of the terms of this permit.
5. Lapse If within one year of the issuance of this permit the authorized construction has
not been substantially completed or the use commenced, this permit shall lapse, unless an extension
is granted in accordance with the Chanhassen Zoning Ordinance.
6. Criminal Penalty Violation of the terms of this conditional use permit is a criminal
misdemeanor.
Dated: January 24, 2011
CITY OF CHANHASSEN
B :
Y
Thom sAA.. Furlong, Mayor
By:
odd Gerhardt, City Manager
STATE OF MINNESOTA )
( ss
COUNTY OF CARVER )
The foregoing instrument was acknowledged before me this ' 7 of q a-��'
2011, by Thomas A. Furlong, Mayor and Todd Gerhardt, City Manager, of the Cit )Uf Chanhassen
a Minnesota municipal corporation, on behalf of the corporation and pursuant to authority granted
by its City Council.
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No ff Pubficd
win nnrv�nns.
US A '''� KAREN I ENGELHARDT
Notary Public - Minnesota
My Commission Expires Jan 31, 2015
DRAFTED BY:
City of Chanhassen
7700 Market Boulevard
P. O. Box 147
Chanhassen, MN 55317
(952) 227 -1100
11