PC SUM 2006 12 05
CHANHASSEN PLANNING COMMISSION
REGULAR MEETING
SUMMARY MINUTES
DECEMBER 5, 2006
Chairman McDonald called the meeting to order at 7:00 p.m.
MEMBERS PRESENT:
Jerry McDonald, Kathleen Thomas, Debbie Larson, Dan Keefe, Kurt
Papke, Mark Undestad, and Kevin Dillon
MEMBERS ABSENT:
None.
STAFF PRESENT:
Kate Aanenson, Community Development Director; Lori Haak, Water
Resources Coordinator; and Alyson Fauske, Assistant City Engineer
PUBLIC PRESENT FOR ALL ITEMS:
Janet Paulsen 7305 Laredo Drive
Rick Dorsey 1551 Lyman Boulevard
Tom Devine 7640 South Shore Drive
PUBLIC HEARING:
CHANHASSEN HIGH SCHOOL, REQUEST FOR INTERIM USE PERMIT TO GRADE
SITE IN PREPARATION OF DEVELOPMENT ON PROPERTY LOCATED NORTH
OF LYMAN BOULEVARD, SOUTH OF THE TWIN CITIES AND WESTERN
RAILROAD, AND WEST OF BLUFF CREEK, ZONED A2, AGRICULTURAL ESTATE
DISTRICT AND REVIEW AN ENVIRONMENTAL ASSESSMENT REVIEW
WORKSHEET. APPLICANT ANDERSON-JOHNSON ASSOCIATES, INC.,/
INDEPENDENT SCHOOL DISTRICT 112, PLANNING CASE 06-35.
Public Present:
Name Address
st
Steve Miller 244 1 Avenue, Minneapolis
Mike Spack 3268 Xenwood Avenue So, St. Louis Park
Jay Pomeroy 7575 Golden Valley Road, Minneapolis
Steve Pumper 11 Peavey Road, Chaska
Paul Schlueter 427 Campfire Curve, Chaska
Phil Standafer 8767 Valley View Place
Al Gomez 8748 Valley View Place
Chairman McDonald summarized the action taken at the last Planning Commission meeting and
reviewed the reasons for tabling. Kate Aanenson and Lori Haak presented the staff report
update, particularly addressing the issue of the bluff. Chairman McDonald continued with the
public hearing. Al Gomez, 8748 Valley View Place continued to questioned staff's interpretation
Planning Commission Summary - December 5, 2006
of where the bluff is measured from and if the assumption has been all along that the school
district would level this site. Chairman McDonald closed the public hearing. After commission
discussion and comments, the following motions were made.
Undestad moved, Thomas seconded that the Planning Commission recommends that the
City Council approve a resolution of Negative Declaration of the Need for an
Environmental Impact Statement for the Chanhassen High School Campus. All voted in
favor, except Keefe who opposed, and the motion carried with a vote of 6 to 1.
Undestad moved, Thomas seconded that the Planning Commission recommends that the City
Council approve an Interim Use Permit to permit grading on the property in preparation of
development, plans prepared by Anderson-Johnson Associates, Inc., dated 10-19-06, subject
to the following conditions:
1.The 50-scale plans should be revised to clearly depict the wetland boundary and wetland
buffer areas.
2.Wetland buffer areas at least 16.5 feet in width should be preserved, surveyed and staked in
accordance with the City’s wetland ordinance prior to grading commencing. All wetlands and
wetland buffer areas should be protected by silt fence during grading.
3.The applicant should keep the goals set forth in the Bluff Creek Watershed Natural
Resources Management Plan (BCWNRMP) for the Lowlands Region in mind as a plan is
developed for the site and should work with staff to achieve these goals for this property.
The Primary Zone boundary and the 40-foot setback should be shown on the plans. No
grading is permitted within the first 20 feet of the 40-foot setback.
4.The erosion and sediment control plan should be aimed at minimizing the amount of exposed
soil at any given time and preventing erosion of exposed soil. Sediment control (especially
perimeter controls such as silt fence) should be viewed as a last resort. The applicant, the
contractor and all subcontractors should recognize that one silt fence at the bottom of a large
slope of exposed soil will not be sufficient to protect down gradient resources in even
moderate precipitation or snowmelt events. To decrease the potential for discharge of
sediment-laden water off-site, the applicant should prepare a plan for phasing the grading of
the project. In general, the areas within 200 feet of wetlands should be graded first and
permanently stabilized as soon as possible. Disturbed areas should be stabilized as soon as
possible after grading to minimize the total amount of exposed soil on site. New areas
should not be graded until after previously graded areas are stabilized.
5.Sediment & Erosion Control (SWPPP) Note 2.a.2 on Sheet C1.2 states that slopes steeper
than 6:1 should be “cat tracked.” The applicant should take extra measures to ensure that this
occurs because cat tracking has been shown to significantly decrease the potential for erosion
on long, steep slopes. A detail should be provided for cat tracking.
6.The haul route between the Construction Staging Area and the Temporary Stockpile Area
should be shown on the 50-scale plans.
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Planning Commission Summary - December 5, 2006
7.All upland areas disturbed as a result of construction activities shall be immediately restored
with seed and disc-mulched, covered with a wood-fiber blanket or sodded within two weeks of
completion of grading in each disturbed area. If practical, a seed and blown-compost mix
should be considered in lieu of dormant seed and straw mulch. The plans should be revised to
call out erosion control blanket locations and to provide a detail for blanket installation.
8.Chanhassen Type II silt fence should be provided adjacent to all areas to be preserved as
buffer (both 16.5-foot wetland buffers and the 20-foot “no grading” zone around the Primary
Zone). The silt fence should be installed in overlapping “J-hooks” to break up the sections
and provide additional water and sediment retaining capacity. Orange tree protection fence
should be installed upslope from the Type 2 silt fence around the wetland between
Temporary Sediment Basin No. 3 and Temporary Sediment Basin No. 4 as added protection
so equipment operators do not impact the wetland by driving heavy equipment through it.
9.The plans should be revised to include Chanhassen’s standard details where available (e.g.,
Detail 5300 for silt fence; Detail 5301 for rock construction entrance). It appears that detail 3
on Sheet C1.4 is intended to depict the proposed checks within the temporary drainageways
shown on Sheet C1.2. This should be clarified and the checks should be installed as often as is
necessary to minimize the velocities of runoff in the drainageways. The plans should be revised
to show a minimum 75-foot long rock construction entrance.
10.In lieu of the proposed outlet pipes for the temporary sediment basins, temporary perforated
risers and stable emergency overflows (EOFs) are needed; details should be included in the
plan. The basins should be properly sized for the watershed areas, according to NPDES
requirements (i.e., the basins should provide storage below the outlet pipe for a calculated
volume of runoff from at least a 2-year, 24-hour storm from each acre drained to the basin,
except that in no case shall the basin provide less than 1800 cubic feet of storage below the
outlet pipe from each acre drained to the basin). The outlet pipes should discharge upstream
from the edge of the receiving wetlands and should be stabilized with riprap.
11.In the present design, water is routed into the wetland in the northeast corner of the site
instead of into Temporary Sediment Basin No. 4. The grading in this area of the site should
be revised to ensure that all discharge from disturbed areas is directed into either Temporary
Sediment Basin No. 3 or Temporary Sediment Basin No. 4 prior to discharge into the
wetland.
12.Street cleaning of soil tracked onto public streets shall include daily street scraping and street
sweeping as needed.
13.The applicant shall apply for and obtain permits from the appropriate regulatory agencies (e.g.,
Riley-Purgatory-Bluff Creek Watershed District, Minnesota Pollution Control Agency) and
comply with their conditions of approval.
14.All temporary stockpiles shall be temporary seeded and mulched within 7 or 14 days, in
accordance with the NPDES Phase II construction site permit.
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Planning Commission Summary - December 5, 2006
15.Rock dissipation shall be installed at all pipe outlets within 24 hours of placement of the
outlet pipes.
16.Slope lengths greater than 75 feet shall be broken up with a minimum 12-foot wide bench
every 75 feet.
17.A minimum12-foot buffer area shall be maintained between the perimeter control and all
stockpiles to provide access around the stockpiles for maintenance purposes.
18.Dewatering activities shall only be allowed after consulting with the on-site city inspector of
the project to ensure compliance with the NPDES permit for dewatering activities.
19.Silt fence shall be placed parallel to contours. In locations where silt fence will cross
contours, J-hooks shall be installed at 75-foot intervals. Silt fence shall not be staked on site
by scaling off the proposed plan, but shall be staked by the survey crew taking shots in the
field. The applicant shall contact SWCD staff prior to silt fence installation so staking on site
can be reviewed to ensure compliance with this request.
20.Drainage swales and ditch cuts shall be employed during mass grading to maintain a positive
flow of stormwater to the temporary basins.
21.During final grading of the site, the height of the berm over the sanitary sewer shall be
reduced to the maximum extent practicable, otherwise additional drainage and utility
easements may be required.
22.The developer is required to televise the section of sanitary sewer over which grading
operations will occur before and after construction to determine if the site grading damaged
the pipe.
23.ISD 112 shall be responsible for repairing any sections of sanitary sewer damaged during
construction.
24.The developer must place sanitary sewer manhole sections on the existing manhole to bring
the top of manhole up to the existing grade.
25.No more than eight inches of rings is allowed on the sanitary sewer manhole.”
All voted in favor, except Keefe who opposed, and the motion carried with a vote of 6 to 1.
PUBLIC HEARING:
AMENDMENT TO CHAPTER 18, SUBDIVISIONS, AND CHAPTER 20, ZONING, OF
THE CHANHASSEN CITY CODE, PERTAINING TO THE SECOND GENERATION
SURFACE WATER MANAGEMENT PLAN.
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Planning Commission Summary - December 5, 2006
Public Present:
Name Address
Tom Devine 7640 South Shore Drive
Lori Haak reviewed changes made to Chapters 1, 7, 13, 18, 19 and 20. Commissioner Papke
asked staff to comment on the items being struck out of Chapter 7 and how getting rid of items is
going to improve storm water quality and if there were any controversial items developers might
find objectionable. Chairman McDonald asked if developers have had a chance to review and
comment on these changes. Commissioner Papke asked staff to further clarify the setback
requirements for the different wetland classification. Chairman McDonald opened the public
hearing. No one spoke and the public hearing was closed. After commissioner comments the
following motion was made.
Papke moved, Dillon seconded that the Planning Commission recommends the City
Council adopt ordinances amending Chapters 1, 7, 13, 18, 19 and 20 of the City Code to
bring the code into compliance with the City's Second Generation Surface Water
Management Plan. All voted in favor and the motion carried unanimously with a vote of 7
to 0.
APPROVAL OF MINUTES:
Commissioner Larson noted the verbatim and summary minutes
of the Planning Commission meeting dated November 21, 2006
COMMISSION PRESENTATIONS:
None.
Chairman McDonald adjourned the Planning Commission meeting at 7:50 p.m.
Submitted by Kate Aanenson
Community Development Director
Prepared by Nann Opheim
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