Engineering Comments 1-18-06
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
VfflW.ci .chan hassen. mn.us
MEMORANDUM
TO:
Bob Generous, Senior Planner
Mak Sweidan, Engineero/ (}t
January 18,2006
FROM:
DATE:
SUBJ:
Interim Use Permit to Grade in Excess of 1000 Cubic Yards at 6421
Hazeltine Boulevard (Highway 41)
Minnetonka Middle School West
Interim Use Permit File No. 2006-03 & Grading Permit File 06-01
GRADING/DRAINAGE/EROSION CONTROL
The applicant is requesting an interim use permit to grade approximately 3,400 cubic
yards of material to construct an infiltration basin on the existing school property to
reduce downstream erosion and sedimentation along Highway 41.
The site drains from east to west, via an existing swale and two storm sewer lines,
toward the existing ditch along Highway 41. The swale is proposed to be filled and
the 125-foot long existing southern storm sewer will be removed. The plans show a
proposed infiltration basin with three rows of 4-inch draintile. The infiltration basin
will receive drainage from the east side of the site and the existing building's roof and
discharge to the Highway 41 ditch through an 8-inch PVC pipe. The applicant must
verify that the existing 24-inch culvert along Highway 41 has sufficient capacity
before replacing the private drive entrance.
The applicant should be aware that if the fill is coming from and/or going to another
site in Chanhassen, a separate grading permit will be required for the other property.
Staff has not yet received a proposed haul route as required. Staff is recommending
that the applicant provide a proposed haul route for review and approval. The
hauling operation is anticipated to begin as soon as permit approval is obtained.
Permitted hours of operation will be 7:00 a.m. to 6:00 p.m., Monday through Friday,
and 9:00 a.m. to 5:00 p.m. on Saturday with no work permitted on Sunday or legal
holidays. The applicant should be aware that any off-site grading will require an
easement from the appropriate property owner. .
Erosion control has been shown on the plan in accordance with the City's Standard
Detail Plates. Staff recommends that an erosion control blanket be installed on the
sides of the infiltration basin. All disturbed areas as a result of construction are
required to be sodded or reseeded and mulched within two weeks of site grading.
An interim use permit expires one year from the date of approval from the City
Council. The permit may be renewed, however, on an annual basis subject to City
Council approval. The applicant will need to request a formal extension 45 days
prior to the expiration date. Financial security to guarantee restoration and erosion
control measures will be required with the permit.
The City 01 Chanhassen · A growing community with clean lakes, quality schools, a charming downtown, thriving businesses, winding trails, and beautiful parks. A great place to live, work, and play.
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