Approval Letter 1-21-05
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
www.ci.chanhassen.mn.us
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January 21,2005
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Mr. Nathan Franzen
Plowshares Development, LLC
1851 Lake Drive West, Suite 550
Chanhassen, MN 55317
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Re: Preliminary Plat Approval - Pinehurst
Planning Case #04-36
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Dear Nathan:
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On January 10,2005, the Chanhassen City Council approved the following:
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Rezoning of the 27.62 acres located within the Pinehurst subdivision from Rural
Residential (RR) to Single-Family Residential (RSF);
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Preliminary plat for Pinehurst Addition with a variance for the use of private streets,
plans prepared by Westwood Professional Services, Inc., dated 9/17/04, revised
9/22/04 and 11/05/04, based on the findings of fact attached to this report and subject
to the following conditions:
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1. Setbacks shall be a minimum of 20 feet from the back of the private street.
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2. Outlots A and B shall be donated to the city.
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3. Water Resources Coordinator Conditions:
a. Wetland buffer widths of 16.5 feet to 20.0 feet shall be maintained around all
wetlands on-site.
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b. All structures shall maintain a 40-foot setback from wetland buffer edges.
c. The building pad on Lot 9, Block 1 shall be revised to reflect the wetland
setback requirements.
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d. Wetland buffer areas shall be preserved, surveyed and staked in accordance
with the City's wetland ordinance. The applicant shall install wetland buffer
edge signs, under the direction of City staff, before construction begins and
shall pay the City $20 per sign.
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The City of 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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Mr. Nathan Franzen
January 21, 2005
Page 2
e. Erosion control blanket shall be installed on all slopes greater than or equal to 3:1. All exposed
soil areas shall have temporary erosion protection or permanent cover year round, according to
the following table of slopes and time frames:
Type of Slope
Stee er than 3: 1
10:1 to 3:1
Flatter than 10: 1
Time
(maximum time an area can remain unvegetated
when area is not activel . worked)
These areas include constructed storm water management pond side slopes, any exposed soil
areas with a positive slope to a storm water conveyance system, such as a curb and gutter
system, storm sewer inlet temporary or permanent drainage ditch or other man made systems
that discharge to a surface water.
f. Daily scraping and sweeping of public streets shall be completed any time construction site
soil, mud, silt or rock is tracked or washed onto paved surface or street that would allow
tracked materials or residuals of that material to enter the storm water conveyance system.
g. Construction site access points shall be minimized to controlled access points with rock
entrance and exit pads installed and maintained throughout construction.
h. Based on the proposed developed area of 23.36 acres, the estimated total SWMP fee, due
payable to the City at the time of final plat recording is $83,465.
1. 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
(NPDES Phase II Construction Permit), Minnesota Department of Natural Resources (for
dewatering)) and comply with their conditions of approval.
4. Natural Resources Coordinator Conditions:
a. A minimum of two overstory trees shall be required in the front yard of each lot.
b. The developer shall be responsible for installing all landscape materials proposed in rear and
side yard areas.
c. Tree preservation fence shall be installed at the edge of the grading limits prior to any
construction.
d. Tree preservation on site shall be according to tree preservation plans dated 09/17/04. Any
trees removed in excess of proposed tree preservation plans will be replaced at a ratio of 2: 1
diameter inches.
e. The feasibility of preserving vegetation along Galpin will be studied and presented at the time
of final plat.
Mr. Nathan Franzen
January 21, 2005
Page 3
5. Engineer's Conditions:
a. The applicant will be required to meet the existing site runoff rates for lO-year and 100-year,
24-hour storm events. The proposed ponds must be designed to National Urban Runoff
Program (NURP) standards. In addition, the proposed ponding must be sized to accommodate
the drainage generated from the property to the north, as shown in the City's Surface Water
Management Plan (SWMP).
b. The storm sewer must be designed for a lO-year, 24-hour storm event. Submit storm sewer
sizing cales and drainage map prior to final plat for staff review and approval.
c. Drainage and utility easements must be dedicated on the final plat over the public storm
drainage system including ponds, drainage swales, and wetlands up to the 100-year flood level.
d. Staff recommends that Type II silt fence, which is a heavy duty fence, be used adjacent to the
existing wetland, existing creek area, and around the proposed pond. In addition, tree
preservation fencing must be installed at the limits of tree removal. Erosion control blankets
are recommended for all of the steep 3: 1 slopes with an elevation change of eight feet or more.
e. All plans must be signed by a registered Civil Engineer in the State of Minnesota.
f. On the utility plan:
1. Show all existing and proposed utility and pond easements.
2. Maintain lO-foot horizontal separation between all sanitary/water/storm sewer mains.
3. Increase the watermain pipe size in Street D to 8-inches in diameter.
4. Add a storm sewer line between Lots 7 and 8, Block 1 with a catch basin at the north
property line for future connection by the property to the north.
5. Extend sanitary manhole #12 to the north property line with an invert elevation of 1049.0.
g. On the grading plan:
1. Show all existing and proposed easements.
2. Show the benchmark used for the site survey.
3. Maximum allowable side slope is 3: 1; revise in the rear yard of Lots 14 and 15, Block 1
and the rear yard of Lot 3, Block 2.
4. Show the location and elevation of all emergency overflows; the elevation must be 1.5'
lower than any adjacent house pad elevations.
5. Show the retaining wall top and bottom elevations.
Mr. Nathan Franzen
January 21, 2005
Page 4
6. Use storm sewer class 5 in roadway; revise note under general grading and drainage notes
accordingly.
h. Any retaining wall over four feet in height must be designed by a registered civil engineer and
a permit from the city building department must be obtained. In addition, encroachment
agreements will be required for any retaining wall within a public easement.
1. The sanitary sewer and water hookup charges along with the Lake Ann Interceptor charge will
be applicable for each of the new lots. The 2004 trunk hookup charge is $1,458.00 per unit for
sanitary sewer and $2,814.00 per unit for watermain. The total 2004 Lake Ann Interceptor
charge is $2,102 per unit and the SAC fee is $1,425.00 per unit. All ofthese charges are based
on the number of SAC units assigned by the Metropolitan Council. Sanitary sewer and water-
main hookup fees may be specially assessed against the parcel at the time of building permit
Issuance.
J. All disturbed areas, as a result of construction, must be seeded and mulehed or sodded
immediately after grading to minimize erosion.
k. The applicant should be aware that any off-site grading will require an easement from the
appropriate property owner.
I. If importing or exporting material for development of the site is necessary, the applicant will be
required to supply the City with detailed haul routes.
m. Due to the depth of the proposed sanitary sewer from MH-20 to MH-17, the required easement
width will be increased to 50 feet.
n. All of the utility improvements are required to be constructed in accordance with the City's
latest edition of Standard Specifications and Detail Plates. The applicant is also required to
enter into a development contract with the City and supply the necessary financial security in
the form of a letter of credit or cash escrow to guarantee installation of the improvements and
the conditions of final plat approval.
o. Street B will be connected to the north to Crestview Drive.
p. Lot 27 is approved with the following conditions:
1. A drainage and utility easement shall be dedicated over the entire width of the swale on the
northwest side of the buildable area on Lot 27, Block 1. No structures shall be allowed within
this drainage and utility easement, with the exception of the retaining wall shown on the
approved grading plan.
2. To ensure proper drainage, a survey shall be required for Lot 27, Block 1 upon completion
of the landscaping. The survey shall be submitted to the City and reviewed by staff to ensure
consistency between final grades and the approved grading plan. If discrepancies exist, any
inconsistent areas shall be re-graded to match the approved grading plan. Additionally, any
property owners should anticipate flowing and/or standing water within the swale on the
northwest side of the property (Lot 27, Block 1). This may preclude mowing of the swale
Mr. Nathan Franzen
January 21,2005
Page 5
during times of above average precipitation.
q. Revise Street C to be a standard 28 foot width.
r. Lower the western end of the site in the area of the two private drives.
s. This development is required to provide enough additional platted right-of-way which results in
50 feet of right-of-way on the western side of the Galpin Boulevard centerline.
t. A right-turn lane into the site off of Galpin Boulevard will be required to be constructed with
specifications determined by time of final plat.
6. Geotechnical testing report and recommendation will be required and needs to be provided to
the city.
7. A 30 foot wide private easement, cross access and maintenance agreement must also be
submitted for the private street.
8. Provide an access trail from this neighborhood to Minnetonka Middle School West, the
location to be determined by time of final plat.
9. A determination shall be made by final plat whether to remove the stub road off of Brenden
Court. If it is determined to remove it, the developer shall either do the work or pay for it to be
removed.
Final plat documents must be submitted to the city three weeks prior to the City Council meeting in
which you wish to have your final plat approved. Enclosed is the list of items required for submittal
for final plat approval.
Should you have any questions, please feel free to contact me at (952) 227-1131.
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Robert Generous, AICP
Senior Planner
Enclosure
ec: Matt Saam, Assistant City Engineer
Steve Torell, Building Official
g:\plan\2004 planning cases\04-36 - pinehurst\approvalletter.doc
ITEMS REQillRED FOR FINAL PLAT CONSIDERATION
6/9104
The following items are required to be submitted a minimum of three (3) weeks prior to City
Council meeting and payment of a $250.00 final plat review fee:
1. Submit three (3) sets of construction plans and specifications for staff review and redline.
The construction plans and specifications shall be in accordance to the City's latest edition
of Standard Specifications & Detail Plates. The plans shall include traffic signage and street
light placement. Utility plans shall show both plan view and profiles of all utilities (sanitary
sewer, water and storm sewer lines). Grading and drainage plans shall show dwelling type
and elevations, wetlands and wetland buffer areas, stormwater pond NWLS and HWLS,
catch basin, and storm manhole numbers.
2. Drainage caleulations for water quantity and quality ponding with maps showing drainage
areas for pre-and post-development conditions and contributing areas to catch basins.
3. Tree Preservation Easements (if applicable).
4. Trail Easements (if applicable).
5. Landscape Plan and Cost Estimates (Woodland Management Plan, if applicable).
6. Engineer's Cost Estimate of Public Improvements:
a. Sanitary sewer system.
b. Water system.
c. Storm sewer drainage system including cleaning and maintenance.
d. Streets, sidewalk and trails.
e. Erosion control.
f. Site restoration (seeding, sodding, etc.).
g. Site grading
7. Ten (10) sets (folded) of final plat, one (1) set of reductions (8W' x 11 "), a digital copy in
.dwg format (AutoCAD compatible), and a digital copy in .tif format.
8. Digital copy of the legal description of the property in a .doc or .pdf compatible format.
9. Lot tabulations
10. 1" = 200' scale paper or mylar reduction of the final plat with just street names and Lot and
Block numbers.
Failure to provide any of the above items by the required deadline will result in delaying
consideration of final plat before the City Council.
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