Approval Letter 04-29-2014CITY OF
7700 Market Boulevard
PC 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
7901 Park Place
Phone: 952.227.1300
Fax: 952.227.1310
Senior Center
Phone: 952.227.1125
Fax: 952.227.1110
Web Site
www. ci.chanhassen. m n. us
April 29, 2014
Mr. Todd Simning
Dogwood Road, LLC
5605 Zumbra Drive
Excelsior, MN 55331
Re: Preliminary Plat for Arbor Cove — Planning Case #2014 -06
Dear Mr. Simning:
This letter is to confirm that on April 28, 2014, the Chanhassen City Council
approved a Comprehensive Plan Land Use Map Amendment of 3.26 acres from
Public /Semi- Public to Residential Low Density; Rezoning of 3.26 acres from Office
Institutional District (OI) to Single Family Residential District (RSF); and Preliminary
Plat Review of 56.67 acres into 5 lots subject to the following conditions:
Parks & Recreation
In lieu of parkland dedication and/or trail construction, full park dedication fees
shall be collected at the rate in force at the time of final plat approval. At today's
rate, these fees would total $23,200 (4 lots x $5,800 per lot).
Buildine
1. Final grading plans and soil reports must be submitted to the Inspections Division
before building permits will be issued.
2. Engineered design and building permits are required for retaining walls exceeding
four feet in height.
3. Each lot must be provided with a separate sewer and water service.
4. Demolition permits must be obtained before demolishing any existing structures.
Natural Resources
1. The applicant shall plant a total of 29 trees in the development. A revised
landscape plan shall be required prior to final plat approval.
2. The applicant shall remove Amur maple from the plant list and replace it with an
alternate ornamental tree.
Chanhassen is a Community for Life - Providing forTodayand Planning for Tomorrow
Mr. Todd Simning
Arbor Cove — Planning Case 2014 -06
April 29, 2014
Page 2 of 5
3. Prior to any grading, the applicant shall install tree preservation fencing using metal stakes
around tree #33 on Lot 4. The fencing shall be placed at the dripline or the furthest point
possible from the trunk and no closer than 20 feet. Within the fencing, the applicant shall
spread a 3 to 4 -inch layer of woodchips to protect the root zone. These protections shall
remain in effect until construction is completed.
4. A tree preservation easement shall be recorded east of the grading limits on Lot 1, over the
rear 85 feet of Lots 2 through 3 and over the rear 75 feet of Lot 4. The applicant shall supply
a legal description for the easement.
5. Easement signage shall be placed on the lot lines at the point of intersection with the
easement on Lots 2 through 4. Signage shall be placed at points of directional change on Lot
1. Signs shall be approved by the city.
En ineering
1. The grading plan shows steep slopes on Lots 2 and 4. Grading must be revised so that no
slope is steeper than 3:1.
2. Grading plans must be revised to show existing and proposed elevations at each lot corner
and the center of the proposed driveways at the curb line.
3. The developer's engineer must revise plans to include spot elevations and building corner
elevations that direct water flow away from all structures.
4. Grading plan must show spot elevations to illustrate where water will flow at the back of Lot
3.
5. The EOF shall be noted with arrows showing the direction of the overflow.
6. Include a lot benching detail in the plans.
7. Draintile service must be provided for Lots 3 and 4, which have drainage flows from the
back to the front of the lot.
8. Proposed stockpile areas must be indentified in the plans.
9. All existing easements shown in the plans must be properly referenced with the document
number or plat they were dedicated under.
10. A preservation easement is proposed along the back of Lots 2, 3 and 4 as well as the east
comer of Lot 1.
11. A new drainage and utility easement over the filtration basin and the channel on Lot 1 will
provide the City access to these stormwater facilities.
12. The developer's engineer must include the elevation of the top and bottom of the retaining
walls.
Mr. Todd Simning
Arbor Cove — Planning Case 2014 -06
April 29, 2014
Page 3 of 5
13. The following retaining wall materials are prohibited: smooth face, poured in place concrete
(stamped or patterned is acceptable), masonry, railroad ties and timber.
14. Grading must be revised to include a swale at the top of the retaining walls for drainage.
15. The topography shown must include elevation contours for Dogwood Road adjacent to the
proposed lots. The centerline gradients must be labeled. The developer's engineer must
incorporate pressure- reducing valves and a surge protection system into the watermain plans.
16. At the time of final plat, the Dogwood Road improvements assessment must be paid or
reassessed.
17. Partial water and sewer hookup fees must be paid at the time of final plat.
Water Resources
1. A Stormwater Pollution Prevention Plan (SWPPP) including all required elements listed in
the General Permit Authorization to Discharge Stormwater Associated with Construction
Activity Under the National Pollution Discharge Elimination System/State Disposal System
Program must be prepared and submitted to the city for review and approval.
2. No native soils may be used in the filtration soil. Instead Mix B from the MN Stormwater
Manual - 70% washed sand and 30% leaf - litter compost mixture shall be used.
3. Pretreatment practices to be employed shall be shown on the plan view and in the detail
sheet. This shall be shown at the curb cut. It is highly recommended that something similar
to the Rain Guardian developed by Anoka Conservation District be used. The pretreatment
device must be approved by the City.
4. It shall be called out on both grading plans that steps shall be taken to prevent compaction
and siltation of the area resulting from construction activities on the site.
5. Remove the filter fabric from the detail and use a choker course of rock instead.
6. The underdrain shall be smooth walled and have a tracer wire.
7. A knife gate valve shall be included prior to the underdrain entering the proposed 27 -inch
manhole. This valve shall be reasonable easy to access.
8. Calculations shall be provided demonstrating that the feature will draw down within 48
hours.
9. Efforts shall be made to decrease the depth as close as possible to the 9.6 inches but no
greater than the 14.4 inches recommended for MH HSG B soils.
Mr. Todd Sinning
Arbor Cove — Planning Case 2014 -06
April 29, 2014
Page 4 of 5
10. Side slopes shall be no steeper than 5:1 and as close to 10:1 as possible except that the south
boundary may be up to 3:1.
11. The feature shall be kept offline until the vegetation has been established. Plans and the
SWPPP must include this information and describe the methodology to be used to achieve
this.
12. A detailed planting plan and schedule must be developed and included in plan set for
approval
13. The in -situ soils shall be ripped to a depth of 12 inches prior placing the amended filtration
soils.
14. The developer shall be responsible for the construction of the biofiltration feature and shall
make assurances that the plant materials, mulch and side slopes into biofiltration feature are
maintained throughout the life of the feature. This is most typically accomplished though a
Homeowners Association. The city will be responsible for maintenance of the underdrain,
outlet pipe and inlet protection device at the curb. An operations and maintenance manual
shall be developed describing how the feature will be maintained and by who will be
responsible for the maintenance.
15. The applicant shall include tree 119 and 129 into the protection plan.
16. The drainage and utility easement shall extend from top of bank to top of bank for the
proposed channel.
17. The 988 and 986 contours shall be broadened to create a more laminar flow before
discharging onto city right -of -way.
18. The plan shall maintain a separation of at least two (2) feet between peak flow elevation in
the channel during the 100 -year storm event and the top of bank for that portion behind the
proposed structure on Lot 1.
19. The SWPPP as well as the erosion control plan must indicate how the conveyance from the
wetland will be permanently stabilized.
20. A detail of the rock checks must be included. This shall be consistent with Technical
Supplement 14C to Part 654 of the National Engineering Handbook.
21. An estimated surface water management connection fee of $14,066.50 will be due with the
final plat.
22. The plans must meet all requirements set forth by other agencies with authority over the site.
The applicant is responsible to procure all necessary approvals and permissions. This
includes, among others, the MN Pollution Control Agency and the Minnehaha Creek
Watershed District.
Mr. Todd Simning
Arbor Cove — Planning Case 2014 -06
April 29, 2014
Page 5 of 5
Plannin¢
Lots 1 through 4 are the only lots included in the land use map amendment from
Public /Semi - Public to Residential Low Density.
2. Approval of the Land Use Amendment is subject to Metropolitan Council determination of
consistency with system plan.
3. Lots 1 through 4 are the only lots included in the rezoning from Office Institutional District
to Single - Family Residential.
4. Approval of the Rezoning is contingent upon approval of the final plat and execution of the
development contract.
Final plat documents must be submitted to the City 30 days prior to the City Council meeting in
which you wish to have your final plat approved. Conditions of the preliminary plat approval
must be addressed for final plat approval. Enclosed is the list of items required for submittal for
final plat approval.
Please note that the final plat may not be approved until the Land Use Map Amendment is reviewed
by the Metropolitan Council and found consistent with the system plan. Additionally, the rezoning
of the residential lots shall not be official until approval of the final plat and execution of the project
development contract. Should you have any questions, please contact me at (952) 227 -1131 or by
email at baenerous na,ci.chanhassen.mn.us.
Sincerel
Robert Generous, AICP
Senior Planner
Enclosure
ec: Kate Aanenson, Community Development Director
Stephanie Bartels, Project Engineer
Todd Gerhardt, City Manager
Terry Jeffery, Water Resources Coordinator
Jerry Mohn, Building Official
Cara Otto, Otto Associates
Westwood Community Church
g1plant2014 planning cases12014 -06 arbor coveVesubmittal 03- 14- 2014tapproval letter prelim plat.doc
ITEMS REQUIRED FOR FINAL PLAT CONSIDERATION
The following items are required to be submitted a minimum of 30 days prior to
City Council meeting and payment of a $250.00 final plat review fee:
Submit three (3) sets of full size, 50 scale construction plans and
specifications for staff review and redline.
• Utility plans shall show both plan view and profiles of all utilities
(sanitary sewer, water and storm sewer lines). The plan view must
show all drainage and utility easements.
• Grading and drainage plans shall show dwelling type and elevations,
wetlands and wetland buffer areas, stormwater pond NWL and HWL,
EOF and catch basin and storm manhole numbers.
• 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.
2. Drainage calculations for water quantity and quality ponding with maps
showing drainage areas for pre -and post - development conditions and
contributing areas to catch basins.
3. Hydraulic calculations and drainage map for the storm sewer design.
4. Tree Preservation Easements (if applicable).
5. Trail Easements (if applicable).
6. Engineer's Cost Estimate of 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
h. Street lights & signs
i. Engineering, surveying & inspection
j. Landscaping
Five (5) sets (folded) of final plat, one (1) set of reductions (8'/2" x 11 "), and
a digital copy in .tif format.
8. Digital copy of the legal description of the property in a .doc format.
9. Lot tabulations.
Failure to provide any of the above items by the required deadline will
result in delaying consideration of final plat before the City Council.
Updated 11 -29 -06
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