Approval Letter 08-14-2013Engineering This letter is to formally notify you that on August 12, 2013, the Chanhassen City
Phone: 952.227.1100 Council adopted the following four motions:
Fax: 952.227.1170
Finance A. COMPREHENSIVE PLAN AMENDMENT
Phone: 952.227.1140
Fax 952.227.1110 Staff recommends that the Planning Commission approve the land use map
amendment from Residential — Low Density to Residential — Low and Medium
Park & Recreation Density with the following condition, and adoption of the attached Findings of Fact
Phone 952.227.1120
Fax: 952.227.1110 and Recommendation:
Recreation Center
August 14, 2013
CITY OF
John Knoblauch
Phone: 952.227.1400
J & S Ventures 1, Inc.
CIIANNSEN
1450 Knob Hill Lane
Planning &
Natural Resources
Excelsior, MN 55331
7700 Market Boulevard
Residential — Low Density (R4) and Mixed Low Density Residential (R8) to Planned
PO Box 147
Re: The Preserve at Rice Lake — Planning Case 2013 -12
Chanhassen, MN 55317
Land Use Map Amendment from Residential -Low Density to
Public works
Residential -Low and Medium Density; Rezoning from Single Family
Administration
Residential (RSF) and Mixed Low Density Residential (R4) to Planned
Phone: 952.227.1100
Unit Development - Residential (PUD -R); Subdivision of 13.22 acres into
Fax: 952.227.1110
16 lots and 2 outlots with Variances (PRESERVE AT RICE LAKE);
Building inspections
Site Plan Review; and Wetland Alteration Permit.
Phone: 952.227.1180
C. PRELIMINARY PLAT:
Fax: 952.227.1190
Dear Mr. Knoblauch:
Engineering This letter is to formally notify you that on August 12, 2013, the Chanhassen City
Phone: 952.227.1100 Council adopted the following four motions:
Fax: 952.227.1170
Finance A. COMPREHENSIVE PLAN AMENDMENT
Phone: 952.227.1140
Fax 952.227.1110 Staff recommends that the Planning Commission approve the land use map
amendment from Residential — Low Density to Residential — Low and Medium
Park & Recreation Density with the following condition, and adoption of the attached Findings of Fact
Phone 952.227.1120
Fax: 952.227.1110 and Recommendation:
Recreation Center
1. Approval of the Land Use Amendment is subject to Metropolitan Council
2310 Coulter Boulevard
determination of consistency with system plan.
Phone: 952.227.1400
Fax 952 227.1404
B. REZONING
Planning &
Natural Resources
Staff recommends that the Planning Commission approve the rezoning from
Phone: 952,2271130
Residential — Low Density (R4) and Mixed Low Density Residential (R8) to Planned
Fax: 952.227.1110
Unit Development — Residential (PUD -R) with the following condition, and adoption
of the attached Findings of Fact and Recommendation and attached ordinance
Public works
rezoning the property.
7901 Park Place
Phone: 952.227.1300
1. Approval of the Rezoning is contingent upon approval of the final plat and
Fax: 952.227.1310
execution of the development contract.
Senior Center
Phone: 952.227.1125
C. PRELIMINARY PLAT:
Fax: 952.227.1110
Staff recommends that the Planning Commission approve the preliminary plat to
Web Site
subdivide 13.22 acres into 16 lots and 2 outlots as shown in plans dated received
www.d.chanhassen.mn.us
August 5, 2013with the following conditions, and adoption of the attached Findings
of Fact and Recommendation:
Chanhassen is a Community for Life - Providing forToday and Planning for Tomorrow
Mr. John Knoblauch
The Preserve at Rice Lake - Planning Case 2013 -12
August 14, 2013
Page 2
All lots must comply with the following table:
COMPLUNCE TABLE
Wetland setback: 20 ft. buffer, 30 ft. principal structure, 15 ft. accessory structure.
Front: 25 ft.
Rear: 30 ft., accessory structure 15 ft.
Side: 10 ft. house, 5 ft. garage
2. All relocated trees shall be warranted for two seasons and replaced by developer if dead or
dying within that time period.
Area
Width
Depth
Maximum
(square feet)
(feet)
(feet)
Hardcover
Notes
(square feet
60 at
PUD
10,000
building
100
30 percent
setback
Ll Bl
10,085
126
122
3,025
Wetland
L2 B1
10,001
90
108
1 3,000
Wetland
L3 Bl
11,324
3148
109
3,397
Wetland
L4 Bl
10,281
76
143
3,084
Wetland
L5 Bl
10,103
70
146
3,031
L6 Bl
10,301
63
134
3,090
L7 Bl
10,017
62
128
3,005
L8 Bl
10,000
62
124
3,000
Wetland
L9 Bl
10,187
62
129
3,056
Wetland
L10 Bl
10,024
63
123
3,007
Wetland
Lll Bl
12,083
65 (building
116
3,625
Wetland
setback)
L12 Bl
10,017
65 (building
118
3,005
Wetland
setback
Ll B2
108
Wetland, * area of neck
14,085*
(building
132
4,225
(4,961 sq. ft.) excluded
setback)
from lot area calculations
L2 B2
10,781
85
106
3,234
Corner lot
L3 B2
10,000
106
127
3,000
L4 B2
10,003
91
148
3,001
Outlot A
282,031
6.47 acres open
space/wetlands
Outlot B
47,560
1.09 acres open
s ace /wetlands
ROW
72,309
1.66 acres
TOTAL
576,299
13.23 acres
Wetland setback: 20 ft. buffer, 30 ft. principal structure, 15 ft. accessory structure.
Front: 25 ft.
Rear: 30 ft., accessory structure 15 ft.
Side: 10 ft. house, 5 ft. garage
2. All relocated trees shall be warranted for two seasons and replaced by developer if dead or
dying within that time period.
Mr. John Knoblauch
The Preserve at Rice Lake — Planning Case 2013 -12
August 14, 2013
Page 3
3. Advanced warning and speed advisory signs are required where the design speed is less than
30 mph.
4. The site plan and HydroCAD model must be revised to address the following comments:
a. Peak discharge rates are proposed to increase at the following locations:
i. Runoff leaving the overall site for the snowmelt events.
ii. Runoff leaving the western portion of Wetland A for the 2, 10 and 100 year design
events.
iii. Runoff leaving the site to the north of the eastern portion of Wetland A for the
snowmelt event.
iv. Runoff leaving the site to the north of the western portion of Wetland A for all events.
b. The drainage areas and/or curve number in the HydroCAD model must correspond to the
Drainage Area and Curve Number Table.
c. Directly connected impervious areas must be modeled separately rather than included in
the composite Curve Number computation.
d. The applicant must provide calculations (or submit a model) demonstrating that the city's
requirements for water quality are satisfied.
i. If the event -based NURP standard cannot be achieved by dead pool storage, then (P8
or other) calculations should be based on equivalent annual removal efficiencies.
ii. If an iron - enhanced filtration system is included in the design, calculations should be
provided demonstrating the water quality treatment benefits of the BMP. Detailed
plans of the system should be submitted for review with the calculations.
iii. The report notes that the east pond is able to remove 87.8% of the phosphorus load.
This removal efficiency appears excessively high. It is anticipated that there is either
an error with the model inputs or the calculation was performed for a particular
rainfall event rather than annualized removal efficiency.
5. The developer shall obtain off -site easements over the existing swale and 18" culvert.
6. The developer agreed to replace the 18" culvert north of the site with a new pipe that
provides the same capacity.
7. The HydroCAD model must be revised so that the impervious surface of the lots is 30 %.
8. If groundwater is encountered during site construction the lowest floor elevations must be
adjusted so that there is a minimum three -foot separation.
Mr. John Knoblauch
The Preserve at Rice Lake — Planning Case 2013 -12
August 14, 2013
Page 4
9. The grading plan must be revised to address the following comments:
a. The developer must obtain a MnDOT permit for the proposed grading within the
MnDOT right -of -way.
b. It is difficult to discern between the proposed contours, lot lines and setback lines. The
developer's engineer is requested to change the drawing line weights.
10. Some homes may choose to install a privately -owned and maintained booster to provide a
higher water pressure.
11. The watermain shall be 8 -inch PVC (C -900).
12. Prior to final submittal the developer must obtain all necessary easements to install the
sanitary sewer off -site, to the north.
13. A portion of the trunk sewer and water hookup fees must be paid in cash with the final plat in
the rate in effect at that time.
14. The proposed location of the catch basin on the east side of the cul de sac must be shifted so
that it will not conflict with the pedestrian ramp to the trail between Lots 11 and 12, Block 1.
15. Street and utility plan and profile construction plans must be submitted with the final plat.
16. Outfalls into the easterly pond must be minimized to the greatest extent practicable.
17. Plan shall show proposed pond maintenance access and landscaping must not interfere with
pond maintenance access.
18. The applicant must apply for and receive an NPDES permit from the Minnesota Pollution
Control Agency and provide evidence to the city prior to grading the site.
19. The Surface Water Pollution Prevention Plan ( SWPPP) must be prepared as a standalone
document and submitted to engineering for review and comment prior to final plat approval.
This SWPPP shall include a narrative, plan set and applicable details.
20. The SWPPP must include the required elements as listed in Part III of the National Pollution
Discharge Elimination System General Permit Authorization to Discharge Stormwater
Associated with Construction Activity ( NPDES Construction Permit) and in the MPCA
SWPPP checklist.
21. A detailed erosion prevention and sediment control plan must be submitted for review and
approval per the requirements of Section 19 -145 of Chanhassen City Code and the NPDES
Construction Permit. This should include, among the other listed requirements, all temporary
and permanent best management practices.
Mr. John Knoblauch
The Preserve at Rice Lake — Planning Case 2013 -12
August 14, 2013
Page 5
22. There is significant evidence of gully erosion at both off -site discharge locations. Rates must
be reduced below existing discharge rates or efforts must be taken to stabilize these discharge
points to prevent further channel incision and head cutting.
23. Wetland buffers are required around all wetlands on site. Extend buffer around wetland E.
24. Wetland buffer must be extended through all disturbed areas. A detailed vegetation
management plan must be developed showing how these areas will be permanently
stabilized.
25. A vegetation establishment and management plan must be developed and submitted for
review for all areas preserved as open space including those areas graded for the construction
of stormwater management practices and the installation of utilities that are above the normal
water level prior to final plat approval.
26. Minnesota Department of Transportation right -of -way is outside of the City of Chanhassen's
WCA jurisdiction as MnDOT is their own LGU. Chanhassen's review of wetland
boundaries ended at the property limits. The applicant must get all appropriate approvals
from MnDOT for work on the sound wall.
27. The development must comply with the MN Rules Chapter 6120 and the DNR must issue
their concurrence to this effect.
28. Estimated Surface Water Management Connection charges due at the time of final plat are
$69,983.50. Provide area of wetland buffer and preservation/volume reduction area after
development to accurately calculate credit.
29. Fifty - percent (50 %) of park fees shall be collected in consideration for the dedication of Outlots
A and B. The park fees shall be collected in full at the rate in force upon final plat submission
and approval. At today's rate these fees would total $46,400 (16 lots X $5,800 per lot/2).
30. Wetland nomenclature on plan set shall be amended to correspond with HydroCAD drainage
report and wetland replacement application.
31. The land owner and the selected contractor must provide a Landowner Statement and
Contractor Responsibility for Work in Wetlands or Public Waters form to the City prior to
working on the road crossing into the site. This form is available on the Board of Soil and
Water Resources website.
32. A detailed planting schedule and maintenance plan must be provided for the
preservation/volume reduction area.
33. Preservation/volume reduction area shall be protected from construction traffic, material
stockpiling and other construction related activities during site development. These
protection measures shall be shown in plans.
Mr. John Knoblauch
The Preserve at Rice Lake — Planning Case 2013 -12
August 14, 2013
Page 6
34. Signs shall be placed along the preservation/volume reduction area to protect the area from
encroachment after build out.
35. Seeded areas within the outlots shall be established and managed according to guidelines and
policies developed by the Minnesota Board of Soil and Water Resources as are available on
their website.
36. Construction of the 8 -foot wide neighborhood trail connection from the public street to the
southeast comer of the property.
37. The applicant shall comply with all MnDOT requirements for any work within their right -of-
way, i.e. noise wall, landscaping, etc.
D. VARIANCES
Staff recommends that the Planning Commission approve the Variances to allow a reduced
setback from Highway 212 and a cul -de -sac that exceeds 800 feet in length as shown in plans
dated received August 5, 2013 with the following conditions and adoption of the attached
Findings of Fact and Recommendation:
1. Approval of the variances is contingent upon approval of the Land Use Plan Amendment,
Subdivision, Site Plan Review, Rezoning and Wetland Alteration Permit.
E. SITE PLAN REVIEW
Staff recommends that the Planning Commission approve the site plan for a medium density
development as shown in plans dated received August 5, 2013 with the following conditions and
adoption of the attached Findings of Fact and Recommendation:
1. Approval of the Land Use Amendment subject the Metropolitan Council determination of
consistency with system plan.
2. Adoption of the Chanhassen PUD Ordinance, which shall be created to govern the site and
design standards.
3. Execution of the Site Plan Permit.
4. Approval of the final plat and execution of the development contract.
F. WETLAND ALTERATION PERMIT
Staff recommends that the Planning Commission approve the wetland alteration permit as shown
in plans dated received August 5, 2013 with the following conditions and adoption of the
attached Findings of Fact and Recommendation:
1. Wetland buffers are required around all wetlands on site.
Mr. John Knoblauch
The Preserve at Rice Lake — Planning Case 2013 -12
August 14, 2013
Page 7
2. A plan should be provided showing the location of all wetland buffer signs. These signs
shall be placed concurrent to the installation of erosion prevention and sediment control
BMPs except when grading is proposed at a buffer monument location.
3. The plan must meet the sequencing requirements of the Minnesota Wetland Conservation
Act. This can be accomplished by locating the sidewalk to the north side of the proposed
road and extending the regional connection between lots 11 and 12 of Block 1.
4. A completed Application for Withdrawal of Wetland Credits Form shall be provided with the
Minnesota Local /State /Federal Application for Water/Wetland Projects as well as a signed
and executed purchase agreement between the applicant and the bank holder.
5. Wetland nomenclature on plan set shall be amended to correspond with HydroCAD drainage
report and wetland replacement application.
6. Approval of the Wetland Alteration Permit is contingent upon approval of the Land Use Plan
Amendment, variances, Rezoning, Site Plan Review, Final Plat, and execution of the
Development Contract.
Attached are items required for final plat consideration.
If you have any questions, please call me at (952) 227 -1134 or e-mail me at
saliaff@ci.chanbassen.mn.us.
Sincerely,
Sharmeen Al -Jaff
Senior Planner
SAJ:ktm
Enclosure
c: Chestnut Group, LLC
ec: Todd Gerhardt, City Manager
Kate Aanenson, Director of Community Development
Alyson Fauske, Assistant City Engineer
Terry Jeffery, Water Resources Coordinator
Todd Hoffman, Park & Recreation Director
Jerry Mohn, Building Official
gAplan\2013 planning cases\2013 -12 preserve at rice lake\approval letter.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
7. Five (5) sets (folded) of final plat, one (1) set of reductions (81/2" 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
gAeng \forms \final plat submittal.doc