Copy of approval letter 4-27-05 for staff review
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
May 25, 2005
Paul, Lori, Jill:
April 27, 2005
Please review the conditions of
approval for the plat to
determine which have been met,
which are still applicable and
which need to be modified. This
item is scheduled for the June
13, 2005 City Council meeting.
Mr. Dean Carlson
D & G of Chanhassen, LLC
7820 Terrey Pine Court
Eden Prairie, MN 55347
Re:
Preliminary Plat Approval- Hidden Creek Meadows
Planning Case #04-31
Dear Dean:
On April 25, 2005, the Chanhassen City Council approved the following:
Preliminary plat approval for a subdivision with a variance for a flag lot, plans
prepared by Ryan Engineering, dated August 20,2004, revised October 14, 2004 and
January 14,2005, subject to the following conditions:
1. A final grading plan and soils report must be submitted to the Inspections
Division before building permits will be issued.
2. Demolition permits must be obtained prior to demolishing any structures on the
site.
3. Separate sewer and water services must be provided each lot.
4. Retaining walls more than four feet high must be designed by a registered
structural engineer and a building permit must be obtained prior to construction.
5. The sauna on Outlot B must be removed.
6. Outlots A and B shall be dedicated to the City.
7. No burning permits will be issued for trees to be removed. Trees and shrubs
must either be removed from site or chipped.
8. Fire apparatus access roads and water supply for fire protection is required to be
installed. Such protection shall be installed and made serviceable prior to and
during the time of construction except when approved alternate methods of
protection are provided. Temporary street signs shall be installed on each street
intersection when construction of new roadways allows passage by vehicles.
Pursuant to 2002 Minnesota Fire Code Section 501.4.
The City ot 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.
Mr. Dean Carlson
April 27, 2005
Hidden Creek Meadows
Page 2
9. A 20-foot clear space must be maintained around fire hydrants, i.e., street lamps, trees, shrubs,
bushes, Xcel Energy, Qwest, cable TV and transformer boxes. This is to ensure fire hydrants can
be quickly located and safely operated by firefighters. Pursuant to Chanhassen City Ordinance
#9-1.
10. Full park fees shall be collected at the rate in force at the time of final plat for 17 single-family
residential lots.
11. The grading on Lots 10-12, Block 2 shall be revised to avoid grading within the wetland.
12. The applicant shall create a five-year maintenance and monitoring plan for new wetland construction
to ensure proposed wetland functions and values are obtained and non-native vegetation does not
encroach into the mitigation area. The monitoring plan shall include the preparation of annual
reports as required by the Minnesota Wetland Conservation Act.
13. Wetland buffer widths of 16.5 feet to 20.0 feet shall be maintained around all wetlands on-site.
All structures shall maintain a 40-foot setback from wetland buffer edge. Wetland buffers and
wetland buffer setbacks shall be shown on the grading plan. Wetland buffer areas shall be
preserved, surveyed and signed 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 will pay the City $20 per sign.
14. The applicant shall develop detailed plans (including an erosion and sediment control plan) for
the installation of the culvert at Pipewood Lane. A winter installation of this culvert is
preferable. A professionally engineered temporary diversion of the stream through a stable
channel during culvert installation is an acceptable alternative.
15. The applicant shall demonstrate that the installation of the 42" proposed culvert at Pipe wood
Lane will not cause water to back up through the existing 4' by 6' culvert under Highway 7 to
the south side of Highway 7 in 10 and 100-year storms.
16. All structures shall maintain a minimum 50-foot setback from the ordinary high water level ofthe
creek.
17. The applicant shall submit calculations to ensure that the pond is sufficient to provide water
quality treatment to NURP standards for storm water from the development.
18. The proposed storm water pond shall be designed to accommodate storm water from the
upstream areas of the MC-A2.6 subwatershed.
19. 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:
Mr. Dean Carlson
April 27, 2005
Hidden Creek Meadows
Page 3
Time
Type of Slope (maximum time an area can remain unvegetated
when area is not activelv beinl! worked)
Steeper than 3: 1 7 Davs
10:1 to 3:1 14 Days
Flatter than 10: 1 21 Days
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.
20. Daily scraping and sweeping of public streets shall be completed anytime construction site soil,
mud, silt or rock is tracked or washed onto paved surfaces or streets that would allow tracked
materials or residuals of that material to enter the storm water conveyance system.
21. At this time, the estimated total SWMP fee due payable to the City at the time of final plat
recording is $45,348.
22. The applicant shall apply for and obtain permits from the appropriate regulatory agencies (e.g.,
Minnehaha Creek Watershed District, Minnesota Pollution Control Agency, United States Army
Corps of Engineers) and comply with their conditions of approval.
23. Prior to final plat approval, a professional civil engineer registered in the State of Minnesota
must sign all plans.
24. Prior to final platting, storm sewer design data with a drainage map will need to be submitted for
staffreview. The storm sewer will have to be designed for a 10-year, 24-hour storm event. The
pond is required to be designed to National Urban Runoff Program (NURP) standards. Drainage
and utility easements will need to 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. The
minimum utility easement width shall be 20 feet wide.
25. Type II silt fence must be used adjacent to all ponds and wetlands. In addition, an erosion
control blanket is required for the steep slopes along the north property line of the site. The
applicant should be aware that any off-site grading would require an easement from the
appropriate property owner.
26. The remaining utility assessment due payable to the City at the time of final plat recording is
$25,477.05. In addition, the sanitary sewer and water hookup charges will be applicable for each
of the new lots. The 2005 trunk utility hookup charges are $1,458 per unit for sanitary sewer and
$2,955 per unit for water. Each of these charges is based on the number of SAC units calculated
by the Metropolitan Council.
27. Public utility improvements will be required to be constructed in accordance with the City's
latest editions of Standard Specifications and Detail Plates. Detailed construction plans and
specifications will be required at the time of final platting. The applicant will also be required to
Mr. Dean Carlson
April 27, 2005
Hidden Creek Meadows
Page 4
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. Permits from the appropriate regulatory agencies must be
obtained, including but not limited to the MPCA, MNDOT, Department of Health, etc.
28. Show all of the existing and proposed easements on the plans.
29. Show all of the existing utilities on the plans.
30. The proposed development is required to meet the existing storm water runoff rates for the 10-
and 100-year, 24-hour storm events.
31. The walk-out elevation of the proposed homes must be a minimum of 3 feet higher than the
adjacent pond or wetland high-water-level.
32. Show the proposed storm manhole rim and invert elevations on the utility plan.
33. Show all emergency overflow elevations on the grading plan.
34. The existing temporary pavement turnaround for Pipewood Lane just south of this site must be
removed when Pipewood Lane is extended. Any disturbed area must be sodded and restored.
35. The retaining wall in the rearyard of Lot 7, Block 1 must be 20 feet off the back ofthe building
pad.
36. Revise the rearyard grading of Lot 9, Block 1 to prevent trapping water behind the curb. Either a
catch basin will need to be added or the area will have to be re-graded with a minimum slope of
2 % to drain from the rearyard to the street.
37. The existing gravel road known as Cartway Lane must be connected to the proposed cul-de-sac
at the eastern border of the site.
38. The existing culvert across the street from Lot 9, Block 2 be connected to the storm sewer for
Pipewood Lane.
39. A minimum of two overstory trees shall be required in the front yard setback area of each lot.
40. Tree protection fencing is required around all trees proposed to be saved. Any tree lost will be
replaced at a rate of 2: 1 diameter inches.
41. The applicant shall confirm the tree canopy coverage and preservation calculations. A total of 193
trees will be required to be planted unless otherwise noted.
42. The following trees are required on each lot as shown on the landscape plan dated 1/14/05:
Mr. Dean Carlson
April 27, 2005
Hidden Creek Meadows
Page 5
Lot Front yard Rear yard
Lot 1, Block 1 2 6
Lot 2, Block 1 2 3
Lot 3, Block 1 2 3
Lot 4, Block 1 2 3
Lot 5, Block 1 2 3
Lot 6, Block 1 2 4
Lot 7, Block 1 2 5
Lot 8, Block 1 2 6
Lot 9, Block 1 2 2
Lot 1, Block 2 2 4, 3 side yard
Lot 2, Block 2 2 2
Lot 3, Block 2 2 4
Lot 4, Block 2 2 2
Lot 5, Block 2 2 2
Lot 6, Block 2 2 2
Lot 7, Block 2 2 4
Lot 8, Block 2 2 3
Lot 9, Block 2 2 4
Lot 10, Block 2 2 4
Lot 11, Block 2 2 5
Lot 12, Block 2 2 1
Outlot A 30
(buffer plantings included in total)
Outlot B 9
43. A landscape plan with a plant schedule that specifies the proposed quantities of each species shall be
submitted to the city prior to final plat approval.
44. The developer shall responsible for planting any trees located in the rear or side yards as shown on
the landscape plan dated 1/14/05.
45. The applicant shall plant only species adaptable to wet sites near the wetland boundary edge.
46. Tree preservation fencing shall be installed at the dripline of the tree saved on Lot 6, Block 2 prior to
any grading.
47. Any plantings occurring on Outlots A or B be field located and no existing vegetation shall be
removed or compromised for the planting of new trees.
48. The applicant shall install landscaping at the end of the Pipewood Lane and along the east boundary
of Lot 12, Block 2 around the cul-de-sac. Evergreens and ornamentals shall be installed so as to
reduce headlight glare and buffer views of the street from the existing homes. A minimum of 9
evergreens and 3 ornamentals shall be planted along the cul-de-sac and along the east side of the
flag lot maintaining planting density of the cul-de-sac along the east border.
Mr. Dean Carlson
April 27, 2005
Hidden Creek Meadows
Page 6
49. The applicant shall remove Colorado blue spruce from the plant schedule and replace it with white
fir or a species of pine.
50. The grading limits shown on the grading plan for Lot 2, Block 2, shall remain as is and the
developer shall adapt to the existing plan as necessary to preserve a small group of maples 12"
and larger.
51. Temporary rock fords should not be used; and crossing the stream with flowing water and no
established stable crossing must be avoided. No work shall take place in the creek between the
dates of March 15th to June 15th to minimize sediment impacts to spawning fish species.
52. MN DOT category 3 erosion blanket and seed should be applied to exposed creek slopes near /
around Pipe wood Lane within 24 hours of final grade.
53. Following stormwater inlet installation Wimco-type (or equal) inlet sediment controls should be
installed and regularly maintained.
54. Following street and utility installation, Chanhassen-specification Type-l silt fence or other
approved perimeter sediment control is needed for all positive slopes curbside.
55. The silt fence proposed across the existing and proposed Pipewood Lane is not practical due to
site access needs.
56. The applicant will work with staff to resolve the access issues on Cartway Lane.
57. The cul-de-sac right-of-way shall be shifted to the west 10 feet and the neck for lot 12 shall be
extended along the east side of the cul-de-sac to provide area outside of the right-of-way for the
recommended landscaping. A public easement for drainage, roadway, and utility purposes must be
dedicated over the northern 43.5 feet of Lot 12, Block 2."
And,
Wetland Alteration Permit, plans prepared by Ryan Engineering, dated August 20,2004, revised
October 14,2004 and January 14,2005, subject to the following conditions:
1. The grading on Lots 10-12, Block 2 shall be revised to avoid grading within the wetland.
2. The applicant shall submit a five-year maintenance and monitoring plan for new wetland
construction to ensure proposed wetland functions and values are obtained and non-native
vegetation does not encroach into the mitigation area. The monitoring plan shall include the
preparation of annual reports as required by the Minnesota Wetland Conservation Act.
3. Wetland buffer widths of 16.5 feet to 20.0 feet shall be maintained around all wetlands on-site.
All structures shall maintain a 40-foot setback from wetland buffer edge. Wetland buffers and
wetland buffer setbacks shall be shown on the grading plan. Wetland buffer areas shall be
preserved, surveyed and signed 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 will pay the City $20 per sign.
Mr. Dean Carlson
April 27, 2005
Hidden Creek Meadows
Page 7
4. Drainage and utility easements shall be provided over all existing wetlands, wetland mitigation
areas, and storm water infrastructure. Easements shall be at least 20 feet in width to allow access
for inspection and maintenance.
5. 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:
Time
Type of Slope (maximum time an area can remain unvegetated
when area is not actively bein!!: worked)
Steeper than 3:1 7 Days
10:1 t03:1 14 Days
Flatter than 10: 1 21 Davs
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.
6. The applicant shall apply for and obtain permits from the appropriate regulatory agencies (e.g.,
Minnehaha Creek Watershed District, Minnesota Pollution Control Agency, United States Army
Corps of Engineers) and comply with their conditions of approval."
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.
Sincerely,
Robert Generous, AICP
Senior Planner
Enclosure
ec: Lori Haak, Water Resources Coordinator
Matt Saam, Assistant City Engineer
Steve Torell, Building Official
g:\plan\2004 planning cases\04-31 - hidden creek meadows\approvalletter.doc