Approval Letter 10-11-05
CITY OF
CHANHASSEN
7700 Markel 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: 952.2271110
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 952.2271125
Fax: 952.227.1110
Web Site
'MNW.ci. chanhassen. mn. us
October 11, 2005
Mr. Kevin Clark
Town & Country Homes
7615 Smetana Lane, Suite 180
Eden Prairie, MN 55344
Re: Liberty on Bluff Creek - Planning Case #05-11
Dear Mr. Clark:
This letter is to notify you that on October 10, 2005 the Chanhassen City Council
approved the following:
Rezoning from A2 to PUD-R; preliminary site plan review with subdivision of 6
blocks and 69 buildings including 444 units, 3 Outlots (A & B which represent the
Overlay District, and C which is the association pool), and 7 common lots of 91.02
acres; conditional uses for the development in the Bluff Creek Overlay District and
alteration of the Flood Plain; and a Wetland Alteration Permit, as stated below and as
shown on the site plan and construction plans dated 9-06-05 subject to the following
conditions:
1. Provide design plan that shows the color and architectural detail for each unit on
the site for final plat approval.
2. The assessment for the AUAR will be paid at the time of plat recording. The
assessment amount, based on gross acreage of 15.5 %, plus wetland delineation
and cultural resources inventory is $22,709.00.
3. The final plat can not be presented to City Council for approval until City Project
04-05 is awarded.
4. Before site grading commences, the three existing buildings on the property must
be razed.
5. On-street parking may be used to satisfy the parking requirement with the
following stipulations:
On-street parking is prohibited between November 1 and April 1 between the
hours of 1 :00 a.m. and 7 :00 a.m., consistent with Section 12-16 ofthe City Code:
Winter Parking Regulations. Credit for on-street parking is not allowed along the
curve of the public streets.
6. The developer's engineer must work with Peterson's Bluffs engineer to ensure
that the proposed grading on each property matches at the property line and to
eliminate and/or decrease the height of retaining walls to the maximum extent
possible.
The City 01 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. Kevin Clark
Planning Case No. 05-11
October 11, 2005
Page 2
7. Ground slopes shall not exceed 3H:IV.
8. The final grading plan must show the proposed top and bottom of wall elevations for all retaining
walls.
9. Retaining walls over four feet high must be designed by a Structural Engineer registered in the
State of Minnesota and require a building permit.
10. The existing driveway at Audubon Road must be removed.
11. All of the ponds are required to be designed to National Urban Runoff Program (NURP)
standards with maximum 3:1 slopes and a 10:1 bench at the NWL.
12. The lowest floor elevation of all buildings must be at least three feet above the HWL of the
adjacent ponds.
13. The last public storm water structure that is road-accessible prior to discharging to a water body
_ must have a 3-foot sump.
14. The applicant shall include a drain tile system behind the curbs to convey sump pump discharge
from homes not adjacent to ponds.
15. The style of home and lowest floor elevation must be noted on the final grading plan.
16. Blanket drainage and utility easements are required over all common lots; however, the following
storm sewer segments shall be owned and maintained by the homeowners association:
a. Northeast and west of Lot 5, Block 1.
b. Within the private cuI de sac to Lots 1-4, Block 3.
c. The connection between the private drives to Lots 9, 10, 11 and 12 Block 1 and the
public lateral within Street A.
d. The connection between the private cuI de sac to Lots 1-4, Block 3 and the public lateral
within Street D.
e. East of Lot 7, Block 4.
f. North of Lots 11-13, Block 5.
g. West of and between Lots 2 and 3, Block 6.
17. The plat must be signed by a Land Surveyor registered in the State of Minnesota.
18. A minimum 75-foot long rock construction entrance must be shown on the plans.
19. Tree preservation fencing must be installed at the limits of tree removal.
20. An easement is required from the appropriate property owner for any off-site grading.
21. 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.
Mr. Kevin Clark
Planning Case No. 05-11
October 11, 2005
Page 3
22. Utility services for the buildings must be shown on the final utility plan. Sanitary services must
be 6-inch PVC and water service must be I-inch copper, Type K.
23. Each new lot is subject to the sanitary sewer and water hookup charges. The 2005 trunk hookup
charge is $1,458 for sanitary sewer and $2,955 for watermain. Sanitary sewer and watermain
hookup fees may be specially assessed against the parcel at the time of building permit issuance.
All of these charges are based on the number of SAC units assigned by the Met Council and are
due at the time of building permit issuance.
24. Upon project completion, the developer must submit inspection/soil reports certifying that the
private streets were built to a 7-ton design.
25. 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. The applicant must be aware that all public utility improvements will require
a preconstruction meeting before building permit issuance.
26. Permits from the appropriate regulatory agencies will be required prior to construction, including
but not limited to MPCA, Department of Health, Carver County and Watershed District.
27. The benchmark used to complete the site survey must be shown on the grading plan.
28. Intersection neckdowns are limited to public street intersections only.
29. Full park dedication fees shall be collected per city ordinance in lieu of requiring parkland
dedication.
30. The trails on both the north and south sides of collector road "A" are widened to 10 feet.
31. The internal or private trail north of Block 1 shall be carefully planned to allow convenient
access to the Bluff Creek Corridor, subject to staff approval.
32. Other internal or private trails connecting residents to amenities within the PUD be enhanced.
33. Wetland replacement shall occur in a manner consistent with the Minnesota Wetland
Conservation Act (MR 8420).
34. The applicant shall work with staff to address comments received from the reviewing agencies,
including conducting MnRAMs for impacted and replacement wetlands for use in sequencing
flexibility for impacts on wetlands A, D, E, J and L. Details regarding the stabilization of areas
upslope of mitigation area M2 shall be included in the replacement plan. More detailed plans for
mitigation areas Ml and M2, including cross-sections, shall be submitted. The applicant shall
consider restorations of wetlands A, F and G for new wetland credit. The applicant must receive
approval of a wetland replacement plan prior to or concurrent with final plat approval and prior to
wetland impacts occurring.
Mr. Kevin Clark
Planning Case No. 05-11
October 11, 2005
Page 4
35. A five-year wetland replacement monitoring plan shall be submitted. The replacement
monitoring plan shall include a detailed management plan for invasive non-native species,
particularly hybrid cattail, purple loosestrife and reed canary grass. The plans shall show fixed
photo monitoring points for the replacement wetland. The applicant shall provide proof of
recording of a Declaration of Restrictions and Covenants for Replacement Wetland.
36. A wetland buffer 16.5 to 20 feet in width (with a minimum average of 16.5 feet) shall be
maintained around all wetlands, with the exception of Basin C. A wetland buffer 20 to 30 feet in
width (with a minimum average of 20 feet) shall be maintained around Basin C. 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 must pay the City $20 per sign.
37. All structures shall be set back 40 feet from the edge of the wetland buffer. The wetland buffer
setback should be shown on the plans.
38. The applicant shall submit a letter of credit equal to 110% of the cost of the wetland creation
(including grading,and seeding) to ensure the design standards for the replac~ment wetland are
met. The letter of credit shall be effective for no less than five years from the date of final plat
approval. The applicant shall submit a cost estimate for wetland creation (including grading and
seeding) so the City can calculate the amount of the wetland creation letter of credit.
39. Clay diversions shall be used to divert runoff around the wetlands on the south side of the
development to the temporary sediment basins downslope of them.
40. Bluff areas (i.e., slope greater than or equal to 30% and a rise in slope of at least 25 feet above
the toe) shall be preserved. In addition, all structures shall maintain a 30-foot setback from the
bluff and no grading may occur within the bluff impact zone (i.e., the bluff and land located
within 20 feet from the top of a bluff).
41. No alterations are allowed within the primary corridor or within the first 20 feet of the setback
from the primary corridor. All structures shall meet the 40-foot setback from the primary
corridor.
42. A copy of the LaMA shall be submitted to the City prior to alterations within the floodplain. In
lieu of a LaMA, the applicant shall obtain a conditional use permit for alterations within the
floodplain.
43. The developer shall determine the base flood elevation (lOO-year) to ensure that the structures
will meet all floodplain elevation requirements.
44. The grade stabilization structure at the north end of Basin A is in disrepair and shall be replaced.
Before the development incorporates this structure into the permanent storm water management
system, the structure shall be assessed and a plan proposed and approved by the city for the repair
or replacement of the structure, as well as long term maintenance. The applicant shall work with
the property owner to the north to get permission to repair or replace the structure.
Mr. Kevin Clark
Planning Case No. 05-11
October 11, 2005
Page 5
45. Drainage and utility easements with a minimum width of 20 feet shall be provided over all
existing wetlands, wetland mitigation areas, buffer areas used as PVC and storm water
infrastructure.
46. A complete Storm Water Pollution Prevention Plan (SWPPP) shall be in place before applying
for and receiving NPDES construction permit coverage from the Minnesota Pollution Control
Agency (MPCA).
47. Minimization of the amount of exposed soils on the site is needed; phasing of the development
shall limit the disturbed areas open.
48. All emergency overflows need temporary and permanent stabilization and shall be shown in a
detail or on the SWPPP. Energy dissipation (riprap and geotextile fabric) shall be installed
within 24 hours of installation of flared end sections and outlet structures.
49. 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
Steeper than 3:1
10:1 to 3:1
Flatter than 10: 1
Time (Maximum time an area can
7 days remain open when the area
14 daysis not actively being worked.)
21 days
50. These areas include constructed storm water management pond side slopes, and 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 natural or man made systems
that discharge to a surface water.
51. Temporary sediment basins shall be constructed and could be located in the proposed permanent
storm water pond locations. If Pond A does not get excavated prior to disturbing the contributing
area; a temporary basin shall be constructed approximately in the areas of Street D and Lot 5,
Block 3. Temporary basins shall be labeled on the SWPPP. A detail shall be provided for the
temporary outlet structures for the temporary basins. Clay berms shall be used to temporarily
divert runoff from the construction site to the temporary basins prior to discharge. Additionally
the clay diversions shall be used to divert runoff around the wetlands on the south side of the
development to the temporary sediment basins downslope of them.
52. Chanhassen Type 2, Heavy Duty silt fence shall be used around all wetlands, streams, creeks,
bluffs and ravines; Chanhassen Type 1 silt fence shall be used around the remaining areas. The
inlet control (for area inlets, not curbside) detail shall be mono-mono heavy duty machine sliced
silt fence with 4 foot maximum spacing for metal T -posts. A rock berm placed around the silt
fence shall be at least 2 feet wide and 1 foot high of 1'h -inch clear rock. Wimco-type inlet
controls shall be installed in all inlets through out the project within 24 hours of inlet installation.
Street cleaning of soil tracked onto public streets shall include daily street scraping and street
sweeping as-needed.
53. At this time, the estimated total SWMP fee, due payable to the City at the time of final plat
recording, is $288,050.
Mr. Kevin Clark
Planning Case No. 05-11
October 11, 2005
Page 6
54. 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 (National
Pollutant Discharge Elimination System Construction Permit), Minnesota Department of Natural
Resources (dewatering permit), and Army Corps of Engineers) and comply with their conditions of
approval.
55. Tree protection fencing shall be installed prior to construction around all areas designated for
preservation.
56. A walk-through inspection of the silt/tree preservation fence shall be required prior to
construction.
57. A turf plan shall be submitted to the city indicating the location of sod and seeding areas.
58. Dedication of Outlot A and B shall be made to the city or a conservation easement shall be
established over said outlots.
59. A lO-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 that fire
hydrants can be quickly located and safely operated by firefighters. Pursuant to Chanhassen City
Ordinance #9-1.
60. There are a number of additional fire hydrants required and some will be re-Iocated.
61. 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.
62. Temporary street signs shall be installed on street intersection when construction of the new
roadway allows passage by vehicles. Pursuant to 2002 Minnesota Fire Code Section 501.4.
63. No burning permits will be issued for trees to be removed. Trees and shrubs must either be
removed from site or chipped.
64. Submit street names to Chanhassen Building Official and Chanhassen Fire Marshal for review
and approval. The Chanhassen Building Official and Fire Marshal will determine which streets
will need naming.
65. "No parking fire lane" signs will be required. Contact the Chanhassen Fire Marshal for exact
location of signs to be installed.
66. Submit cul-de-sac design dimensions to City Engineer and Fire Marshal for review and approval.
67. Accessibility will have to be provided to all portions of the development and a percentage of the
units may also be required to be accessible or adaptable in accordance with Minnesota State
Building Code Chapter 1341. Further information is needed to determine these requirements.
Mr. Kevin Clark
Planning Case No. 05-11
October 11, 2005
Page 7
68. Buildings over 8,500 sq. ft. in size must be protected with an automatic fire protection system.
The State of Minnesota is in the process ofrevising Chapter 1306 ofthe Minnesota State
Building Code regarding fire protection systems. It is not yet entirely clear how these changes
will affect residential construction. It is important that the developer meet with the Inspections
Division prior to final design to determine what ramifications, if any, the new requirements will
have on the project.
69. The developer must submit a list of proposed street names and an addressing plan for review and
approval prior to final plat of the property.
70. Demolition permits must be obtained before demolishing any structures on the site.
71. A final grading plan and soils report must be to the Inspections Division before permits can be
issued.
72. Walls and projections within 3 feet of property lines are required to be of one-hour fire-resistive
construction.
73. The buildings will be required to be designed by an architect and engineer as determined by the
Building Official.
74. The developer and or their agent shall meet with the Inspections Division as early as possible to
discuss plan review and permit procedures."
Sincerely,
fl. .~
\0a
Kate Aanenson, AICP
Community Development Director
ec: Alyson Morris, Assistant City Engineer
Steve Torell, Building Official
Lori Haak, Water Resources Coordinator
g:\plan\2005 planning cases\05-11 liberty on bluff creek\approvalletter.doc