Approval Letter 08-14-2013CITY OF
7700 Market Boulevard
PC Box 147
Chanhassen, MN 55317
Administration
Phone: 952.227.1100
Fax: 952.2271110
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: 952.2271110
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: 952.2271130
Fax 952.227.1110
Public Works
7901 Park Place
Phone: 952.227.1300
Fax: 952.227.1310
Senior Center
Phone: 952.2271125
Fax: 952.227.1110
Web Site
www.d.chanhassen.nnn.us
August 14, 2013
Mr. David Pokorney
Community Asset Development Group
1403 Valley View Road
Chaska, MN 55318
Re: Bluff Creek Cottages — Planning Case 2013 -08
Dear Mr. Pokorney:
This letter is to formally notify you that on August 12, 2013, the Chanhassen City
Council adopted the following four motions:
1. REZONING
Planning Case #2013 -08 to rezone 8.9 acres of property zoned A2, Agricultural
Estate District, to R -8, Mixed Medium- Density Residential for Bluff Creek Cottages
contingent upon site plan approval, as shown in plans dated received June 14, 2013,
and adoption of the Findings of Fact.
2. CONDITIONAL USE PERMIT
The conditional use permit for Planning Case 2013 -08 for Bluff Creek Cottages as
shown in plans dated received June 14, 2013, and including the attached Findings of
Fact and Recommendation, subject to the following conditions:
1. The plans are amended to read "Assumed wetland boundary — area not delineated
per 1987 Corps Manual."
2. The 894' contour is the assumed wetland boundary for purposes of determining
buffer and setbacks.
3. Wetland buffer shall be shown to measure twenty (20) feet as is consistent with a
Manage 2 wetland. The setback from this buffer shall then be thirty (30) feet.
4. That portion of the property containing the Bluff Creek Primary Zone and the
tributary to Bluff Creek is dedicated to the city as per discussion with applicant
and city staff.
5. The applicant must apply for and receive a NPDES construction permit prior to
any earth - disturbing activity.
6. The applicant must prepare a SWPPP consistent with the NPDES construction
permit requirements (Part III) and submit this SWPPP to the city for review and
comment.
Chanhassen is a Community for Life - Providing forTodayand Planning for Tomorrow
Mr. David Pokorney
Bluff Creek Cottages — Planning Case 2013 -08
August 14, 2013
Page 2
7. The construction of the bioretention area shall be phased such that it is not disturbed until
after the rest of the site has been graded. The plans shall be amended to reflect this and
perimeter control shall be installed that will prevent the operation of equipment and the
stockpiling of materials in this area.
8. Sediment control Best Management Practices shall remain in place around the bioretention
basin until the area tributary to the basin is stabilized.
9. Inlet protection shall be installed on the double catch basin on Pioneer Trail located
downstream of the site prior to commencement of earth - disturbing activities. Inlet protection
shall be installed on all catch basins and curb cuts interior to the site after installation until
final stabilization is met.
10. All outfalls, including the curb cut, shall be stabilized within 24 hours of connection.
11. The rip rap for the curb cut shall extend, uninterrupted, to the normal water level of the
proposed pond (905.0').
12. The geotextile fabric shall have a permittivity value of 0.5 or higher.
13. The model shall be amended to show that the peak discharge rate at the curb cut is no greater
than 3.0 cfs during the 25 -year storm event. If this cannot be achieved, the applicant is
strongly encouraged to use pipe to convey stormwater runoff.
14. An operations and maintenance manual shall be provided to the city for review and approval
and shall cover the bioretention feature and the swale inlet into the pond.
15. The outfall for the stormwater detention pond shall be pulled away from the wetland such
that there is adequate room to install all rip rap without any disturbance below the 894'
contour. If practicable to do so, the outfall shall be pulled entirely outside of the wetland
buffer area.
16. The bioretention feature shall be designed in a manner consistent with the Minnesota
Stormwater Manual "design criteria for bioretention ".
17. A detailed plan for the bioretention feature, including phasing, soil amendments, underdrain
(if necessary) and planting schedule shall be provided to the city for review and approval.
18. Percolation tests shall be performed in the bioretention area to determine infiltration rates.
The model shall be amended based upon these findings and provided to the city.
19. The bioretention feature shall be designed such that it drains within 48 hours.
20. Pretreatment shall be provided prior to discharge to the bioretention feature. This shall be a
grass swale consistent with the MN Stormwater Manual "Guidelines for filter strip pre-
treatment sizing ", a forebay or a sump manhole at least three feet in depth.
Mr. David Pokorney
Bluff Creek Cottages — Planning Case 2013 -08
August 14, 2013
Page 3
21. The applicant must receive permission from Carver County for the proposed runoff condition
into Pioneer Trail and provide a spread and run calculation to show that the proposed catch
basin will capture the ten -year event or otherwise design the storm sewer to capture this
event.
22. The applicant is responsible for all other permits and approvals.
3. SITE PLAN APPROVAL
The site plan consisting of a 13,700 square -foot continuing care retirement facility, Planning
Case 2013 -08 for Bluff Creek Cottages as shown in plans dated received June 13, 2013, and
including the attached Findings of Fact and Recommendation, subject to the following conditions:
Building Official Conditions:
1. The proposed structure is required to have an automatic fire extinguishing system.
2. All plans must be prepared and signed by design professionals licensed in the State of
Minnesota. A geotechnical (soil evaluation) report is required.
3. Designs \plans for retaining wall(s) exceeding four feet in height must be prepared and signed
by a structural engineer.
4. Detailed building code - related requirements have not been reviewed; this will take place
when complete structural /architectural plans are submitted.
5. Structures and site must meet Minnesota Accessibility Code.
6. The owner and/or their representative shall meet with the Inspections Division as soon as
possible to discuss plan review and permit procedures.
Fire Marshal Conditions:
1. Add one hydrant at the intersection of Pioneer Trail and the entrance road.
2. In addition to 12 -inch address numbers on the building, address numbers will be required at
driveway entrance. Contact Chanhassen Fire Marshal for requirements.
3. A PIV, Post indicator valve will be required.
4. Yellow painted curbing and "No Parking Fire Lane" signs are required. Contact Chanhassen
Fire Marshal for details.
5. City Engineer shall verify that the purposed fire apparatus turnaround is sufficient.
6. A three -foot clear space must be maintained around fire hydrant(s).
Mr. David Pokomey
Bluff Creek Cottages — Planning Case 2013 -08
August 14, 2013
Page 4
Planning Conditions:
1. All rooftop and ground equipment must be screened from views.
2. Approval of the site plan application is contingent upon approval of the rezoning and
conditional use permit for Planning Case 2013 -08.
3. The monument sign may not exceed 24 square feet in area nor be higher than 5 feet. The
sign shall be located 10 feet from the property line.
4. Sign illumination and design shall comply with ordinance. If illuminated, the letters shall be
backlit and use individual dimension letters, at least one -half inch deep. The sign materials
shall be compatible with the building. The applicant must apply for a sign permit.
5. The trash enclosure for the building has not been shown on the plans. The structure must be
screened from views and constructed of the same materials as the building. Recycling space
and other solid waste collection space should be contained within the same enclosure as the
trash.
6. Light levels for site lighting shall be no more than one -half foot candle at the project
perimeter property line. This does not apply to street lighting. Light fixtures shall be
downcast and the light shall be cut off at a 90- degree angle as required by the city code. All
fixtures shall be shielded.
Park and Trail Conditions:
1. Park fees in the amount of $12,000 shall be collected as part of the site plan permit.
Engineering Conditions:
An agreement must be obtained from MnDOT and Carver County to allow the driveway to
connect to Pioneer Trail (County Road 14) and to allow construction of private utilities in the
right -of -way.
2. The applicant must apply for and receive a NPDES construction permit prior to any earth -
disturbing activity.
3. The applicant must prepare a SWPPP consistent with the NPDES construction permit
requirements (Part III) and submit this SWPPP to the city for review and comment.
4. The construction of the bioretention area shall be phased such that it is not disturbed until
after the rest of the site has been graded. The plans shall be amended to reflect this and
perimeter control shall be installed that will prevent the operation of equipment and the
stockpiling of materials in this area.
5. Sediment control Best Management Practices shall remain in place around the bioretention
basin until the area tributary to the basin is stabilized.
Mr. David Pokorney
Bluff Creek Cottages — Planning Case 2013 -08
August 14, 2013
Page 5
6. Inlet protection shall be installed on the double catch basin on Pioneer Trail located
downstream of the site prior to commencement of earth- disturbing activities. Inlet protection
shall be installed on all catch basins and curb cuts interior to the site after installation until
final stabilization is met.
7. All outfalls, including the curb cut, shall be stabilized within 24 hours of connection.
8. The rip rap for the curb cut shall extend, uninterrupted, to the normal water level of the
proposed pond (905.0').
9. The geotextile fabric shall have a permittivity value of 0.5 or higher.
10. The plans must be signed by a registered engineer.
11. Ten -foot drainage and utility easements are required over all public utilities.
12. An existing topography plan sheet must be included in the plan set.
13. The grading plans must be amended so that no slopes exceed 3:1.
14. The developer's engineer must submit a soils report and boring log for this site indicating the
soil conditions, permeability and slope.
15. The plans must show the elevations at the corners of the proposed building and where the
building foundation is acting as a retaining wall.
16. The plans must identify any stockpile areas that will be used during construction.
17. The developer's engineer must call out the 6 -foot retaining wall around the "outdoor space"
in the plans and include top and bottom of wall elevations.
18. The following materials are prohibited for retaining wall construction: smooth face, poured -
in -place concrete (stamped or patterned concrete is allowed), masonry, railroad ties or
timber. Walls taller than 6 feet shall not be constructed with boulder rock.
19. The developer's engineer must adjust grading at the face of the east retaining wall to create a
swale so water will flow away from both the wall and the building.
20. The retaining walls shall be privately owned and maintained.
21. All retaining walls over six feet high and within 10 feet of a sidewalk or other public way
must have a fence or other barrier. This condition includes the areas where the building
foundation will act as a retaining wall.
22. Before vehicles enter Pioneer Trail, the driveway must provide a landing area that starts at
least 50 feet back from the crosswalk and is at a 2% maximum grade.
23. The parking lot aisle must be 26 feet wide.
Mr. David Pokomey
Bluff Creek Cottages — Planning Case 2013 -08
August 14, 2013
Page 6
24. The turnaround must allow enough room for a fire truck to turn and exit the parking lot
without going through the parking spaces. Approved turnarounds include a 100 -foot
hammerhead and a 70 -foot diameter cul -de -sac.
25. The plans are amended to read "Assumed wetland boundary — area not delineated per 1987
Corps Manual."
26. The 894' contour is the assumed wetland boundary for purposes of determining buffer and
setbacks.
27. Wetland buffer shall be shown to measure twenty (20) feet as is consistent with a Manage 2
wetland. The setback from this buffer shall then be thirty (30) feet.
28. That portion of the property containing the Bluff Creek Primary Zone and the tributary to
Bluff Creek is dedicated to the city as per discussion with applicant and city staff.
29. The model shall be amended to show that the peak discharge rate at the curb cut is no greater
than 3.0 efs during the 25 -year storm event. If this cannot be achieved, the applicant is
strongly encouraged to use pipe to convey stormwater runoff.
30. An operations and maintenance manual shall be provided to the city for review and approval
and shall cover the bioretention feature and the Swale inlet into the pond.
31. The outfall for the stormwater detention pond shall be pulled away from the wetland such
that there is adequate room to install all rip rap without any disturbance below the 894'
contour. If practicable to do so, the outfall shall be pulled entirely outside of the wetland
buffer area.
32. The bioretention feature shall be designed in a manner consistent with the Minnesota
Stormwater Manual "design criteria for bioretention ".
33. A detailed plan for the bioretention feature, including phasing, soil amendments, underdrain
(if necessary) and planting schedule shall be provided to the city for review and approval.
34. Percolation tests shall be performed in the bioretention area to determine infiltration rates.
The model shall be amended based upon these findings and provided to the city.
35. The bioretention feature shall be designed such that it drains within 48 hours.
36. Pretreatment shall be provided prior to discharge to the bioretention feature. This shall be a
grass swale consistent with the MN Stormwater Manual "Guidelines for filter strip pre-
treatment sizing ", a forebay or a sump manhole at least three feet in depth.
37. The applicant must receive permission from Carver County for the proposed runoff condition
into Pioneer Trail, and provide a spread and run calculation to show that the proposed catch
basin will capture the ten -year event or otherwise design the storm sewer to capture this
event.
38. The applicant is responsible for all other permits and approvals.
39. The developer's engineer must show the detailed lift station design and location in the plans.
Mr. David Pokomey
Bluff Creek Cottages — Planning Case 2013 -08
August 14, 2013
Page 7
40. The City of Chaska must approve the sanitary sewer plans.
41. The sanitary sewer and watermain shall be privately owned and maintained.
42. A plan sheet is required to show the watermain extension from the driveway to the
connection to Chanhassen's watermain system.
43. The watermain that is parallel to Pioneer Trail must be 8 inches for fire flow conditions.
44. The developer's engineer shall model the watermain extension for fire flow demand to the
development to ensure the watermain pipe size is adequate.
45. Fire hydrants are required every 400 feet, and gate valves are required every 800 feet.
46. This property has outstanding assessments from previous improvement projects that were
deferred due to the property's Green Acres status. Altering the zoning for this property will
cause the assessments to come due.
47. Water and sewer trunk and hook -up fees are to be collected with the development contract.
48. A permit is required for any work within the MnDOT or Carver County right -of -way.
49. A temporary construction easement will be required for the installation of utilities within
road right -of -way.
Miscellaneous Conditions:
1. The applicant shall work with staff on minor plan modifications."
Site Plan Agreements must be prepared by our offices for recording; however, cost estimates for
the improvements must be submitted to our offices before the agreement can be prepared.
If you have any questions, please call me at (952) 227 -1134 or e-mail me at
salj aff2ci.chanhassen.mn.us.
Sincerely, /
Sharmeen Al -Jaff
Senior Planner
c: John Klingelhutz
ec: Todd Gerhardt, City Manager
Kate Aanenson, Community Development Director
Todd Hoffinan, Park & Recreation Director
Alyson Fauske, Assistant City Engineer
Terry Jeffery, Water Resources Coordinator
Jerry Mohn, Building Official
g: \plan\2013 planning cases\2013 -08 bluff creek cottage \resubmittal 6- 14- 13\approval letter.doe