CAS-12_WATER TREATMENT PLANT - CITY OF CHANHASSEN (2)0 • .tios- I z
Metropolitan Council
May 20, 2005
Robert Generous, Senior Planner
City of Chanhassen
7700 Market Blvd
P.O. Box 147 (+�
Chanhassen, MN 55317� 2005
RE: City of Chanhassen, Gateway East 2nd Amendment— Waiver 01 2 A h$Sco
Metropolitan Council Review File No. 16500-10 CF CNPNH
Metropolitan Council District 4 (Julius Smith, 952-443-2430) GO
Dear Mr. Generous:
The Metropolitan Council received the City's Gateway East 2nd plan amendment on April 27, 2005. The
amendment proposes to change the land use designation for approximately 4 acres located near Highway 5 and
Highway 101 from Park and Open Space to Commercial. The purpose of the amendment is to allow
construction of a city -owned and operated water treatment plant.
Council staff finds that the amendment is in conformance with metropolitan system plans, consistent with the
Regional Development Framework, and has no impact on the plans of other units of local government. Council
staff also finds that this amendment meets the Comprehensive Plan Amendment Administrative Review
Guidelines adopted by the Council on May 11, 2005. Therefore, the Council waives further action on this review
and the City may place this amendment into effect immediately.
However, staff offers the following advisory comments:
The Regional Park System plan includes the following three proposed regional trails: along Highway 101, along
Highway 5, and along the Twin Cities and Western Railroad, if it ceases to be used for rail purposes. The
proposed water treatment plant site also includes a trail bridge over Highway #5.
The three proposed regional trails could potentially be routed through the proposed Water Treatment plant site.
Council staff recommend that the city work Marty Walsh, Director of Carver County Parks, to determine how to
best plan and locate the proposed regional trails and to provide a connection to the local trail bridge overpass.
One potential option would be to modify the site design for the water treatment plant to accommodate both the
water treatment plant and the proposed future RT connections.
The amendment, explanatory materials supplied and the information submission form will be appended to the
City's Plan in the Council's files. If you have any questions about this review, please contact Tom Caswell,
Principal Reviewer, at 651-602-1319.
Sincerely,
jhyl anson, Manager
lanning Assistance
cc: Julius Smith, Metropolitan Council District 4
Tom Caswell, Sector Representative Scott/Carver County
Solveig Berg, GIS, w/maps
Cheryl Olsen, Reviews Coordinator
V:1RLv1EwSiCommmities:Clwlmseti �Chanl�sen 2005 CPA- Gateway East 2nd -waiver 16500-10.da:
www.metrocounca..org Metro Info Llne 602-1888
230 Fast Fifth Street • St. Paul, Minnesota 55101-1626 • (651) 602-1000 • Fax 602-1550 • TIT 291-0904
An Equal Opportunity Employer
GCM NN
Page 1 of 1
• 0
Generous, Bob
From: Saam, Matt
Sent: Wednesday, March 30, 2005 9:45 AM
To: Generous, Bob
Subject: FW: East Water Treatment Plant Impervious Area
Bob,
Let me know if you need anything else.
Thanks,
Matt
-----Original Message -----
From: Paul Weidler [mailto:pweidler@sehinc.com]
Sent: Wednesday, March 30, 2005 9:34 AM
To: Saam, Matt
Cc: Jay Whitaker
Subject: East Water Treatment Plant Impervious Area
Matt, below is the information you requested.
Total Lot 1 area = 108,404 S.F.
= 2.49 acre
Street area
= 26,850 S.F.
Trails area
= 8,714 S.F.
Sidewalk area
= 1,076 S.F.
Roof area
= 12,745 S.F.
Total Impervious = 49,385 S.F.
Total Impervious = 1.14 acre
I did not include Outlot A in this calculation.
Paul R Weidler
SEH-Local Infrastructure
Water Practice Center
St Paul, MN
651-490-2043 (Direct)
3/30/2005
MEMORANDUM
MY OF
CgANgASSEN
TO: Bob Generous, Senior Planner
7700 Market Boulevard
FROM: Matt Saam, Assistant City Engineer
PO Box 147
Chanhassen, MN 55317
DATE: March 28, 2005
Administration
Phone: 952.227.1100 SUBJ: Preliminary Plat Review of Gateway East 2ed Addition
Fax: 952.227.1110 Project No. 04-08
Building Inspections
Phone: 952.227.1180
Fax: 952.227.1190 Upon review of the plans submitted by SEH stamped March 8, 2005, I offer the
Engineering following comments and recommendations:
Phone: 952.227.1160
Fax:952.227.1170 GRADING, DRAINAGE & EROSION CONTROL
Finance
Phone:952227.1140
The existing site ranges from a high elevation of 978 in the west central portion of
Fw 952.227.1110
the site down to a low point of 940 in the southeast corner. The plans propose to
Park & Recreation
grade about 60% of the site for a water treatment plant, a proposed street with a
Phone:952.227.1120
cul-de-sac, and a stormwater pond. While the finished floor elevation of the
Fax: 952.227. 1110
treatment plan is set at 969.0, the site cannot be graded down to this elevation
Recreation center
because of the existing pedestrian bridge. The applicant has done a nice job of
2310 Coulter Boulevard
Phone:952.227.1400
working with this constraint and matching into the existing 978 elevation along
Fax:952.227.1404
the east side of the building. Because of the need to hold the 978 ground
elevation near the pedestrian bridge, a retaining wall (6' — 10') will be required
Punning a
Natural Resources
along� alon the north h side of the tanks adjacent to the south side of the street
Phone: 952.227.1130
and trail. This retaining wall will require a building permit from the City's
Fax: 952.227.1110
Building Department.
Public Works
1591 Park Road
The existing site drainage is encompassed within two different drainage areas.
Phone:952.227.1300
Under existing conditions, the western most portion of the site drains off site to
Fax:952.227.1310
the west while the remainder of the site drains to an existing storm sewer culvert
Senior center
in the southeast comer of the site. Under developed conditions, the applicant is
Phone:952.227.1125
proposing to capture the eastern half of the street drainage, all of the Lot 2
Fax: 952.227.1110
drainage, and a large majority of the Lot 1 drainage. This stormwater will be
Web she
conveyed via storm sewer and overland flow to the proposed pond in the
www.ci.chanhassennn.us
southeasterly corner of the site for treatment. The remaining impervious runoff
from the street and treatment plant will drain to an existing storm sewer in W. 79In
St. which flows to an existing pond in the downtown area. The proposed pond
must be designed to National Urban Runoff Program (NURP) standards with
maximum 3:1 side slopes and a 10:1 safety bench at the NWL. An outlet control
structure, per City Detail Plate No. 3109, must be installed at the outlet of the
pond.
The City of Chanhassen 9 A growing community with clean lakes, quality schools, a charming downtown, thriving businesses, winding trails, and beautiful parks. A geat place to live, work, and play.
Bob Generou• •
March 28, 2005
Page 2
Drainage calculations for the site have been submitted and only minor changes
remain. The applicant is required to meet the existing site runoff rates for the 10-
year and 100-year, 24-hour storm events. Storm sewer sizing calculations must
be submitted prior to final plat application. The storm sewer must be sized for a
10-year, 24-hour storm event. Drainage and utility easements must 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.
Proposed erosion control must be developed in accordance with the City's Best
Management Practice Handbook (BMPH). Staff recommends that Type I silt
fence be used along the entire south and west construction limits. A rock
construction entrance, per City Detail Plate No. 5301, must be added to the plans
off of existing W. 79`s Street. In addition, tree preservation fencing must be
installed at the limits of tree removal. All disturbed areas, as a result of
construction, must be seeded and mulched or sodded immediately after grading to
minimize erosion. Any off -site grading will require an easement from the
appropriate property owner.
UTILITIES
Municipal sanitary sewer is available to the site from the south. There is an
existing sanitary sewer main along the southern property line which the applicant
is proposing to connect a service line to. This connection will require the
installation of a manhole on the existing sewer main. As for water, the treatment
plant itself will have multiple water lines coming to/from the building. These
watermains include typical distribution mains, raw watermains to carry water
directly from the wells to the treatment plant, a reclaim watermain which will
carry a portion of the filter backwash water back to the plant for treatment, and
spraywash mains which give the Utility Department staff the ability to clean out
the backwash tanks. The actual potable water service to the plant will come from
the south side of the building off a relocated watermain. All of the utility
improvements are required to be constructed in accordance with the City of
Chanhassen's latest edition of Standard Specifications and Detail Plates. Detailed
construction plans, including plan and profile drawings of the proposed utilities,
are required to be submitted at the time of final plat.
STREETS
The plans propose on extending W. 79m Street approximately 250 feet east of its
current terminus to serve the two proposed lots. Because this street will be
extended within public or City -owned property, additional public right-of-way is
not necessary. The existing pavement width of W. 79`s Street is 27 feet from
back -of -curb to back -of -curb. The standard pavement width for public streets in
commerciallbusiness districts in Chanhassen is 36 feet from back -of -curb to back -
of -curb with a 48-foot cul-de-sac radius. In this case, staff is fine with the street
width staying at 27 feet in order to stay consistent with the existing street width to
Bob Generou•
March 28, 2005
Page 3
the west. The cul-de-sac pavement radius is proposed at 60-feet. This radius
exceeds the current standard and will provide greater area for semi -trucks to
turnaround.
With the expected increase in traffic on W. 79'h Street from deliveries to the
treatment plant and the future development of Lot 2, staff is recommending that
additional signage be installed near the existing Hanus Building just west of the
site. The signage is needed because of the existing blind approach to motorists
leaving Brown's Auto and conversely to motorists heading west from the new
treatment plant.
RECOMMENDED CONDITIONS OF APPROVAL
1. The applicant is required to meet the existing site runoff rates for the 10-year
and 100-year, 24-hour storm events. The proposed pond must be designed to
National Urban Runoff Program (NURP) standards.
2. The storm sewer must be designed for a 10-year, 24-hour storm event.
Submit storm sewer sizing calcs and drainage map prior to final plat for staff
review and approval.
3. Drainage and utility easements must 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 easement width must be 20 feet
wide.
4. Submit a separate site plan, grading/drainage/erosion control plan, and utility
plan.
5. Pedestrian ramps per City Detail Plate No. 5215 are required at the street
crossing of the proposed trail.
6. Permits from the appropriate governmental agencies must be obtained
including: MPCA, Watershed District, MnDOT, Department of Health, and
Railroad Authority.
On the grading plan:
a. Show all existing and proposed easements.
b. Show the benchmark used for the site survey.
c. Show all proposed contour lines in bold.
d. Show the emergency overflow elevation from the proposed pond.
e. Show all proposed contours on the north side of the proposed trail and on
Lot 2.
f. Do not show the proposed sanitary/water lines on the grading plan.
g. Show the proposed storm sewer to/from the pond.
Bob Generous •
March 28, 2005
Page 4
8.On the site plan, show the dimensions for street width, cul-de-sac radius,
parking stalls, trail, etc.
9.On the utility plan:
a. Show all existing and proposed utilities.
b. Show the proposed rim and invert elevations for all sanitary and storm
sewer.
10. The proposed retaining wall along the north side of the backwash tanks will
require a building permit from the City's Building Department.
11. Proposed erosion control must be developed in accordance with the City's
Best Management Practice Handbook (BMPH). Staff recommends that Type
I silt fence be used along the entire south and west construction limits. A
rock construction entrance, per City Detail Plate No. 5301, must be added to
the plans off of existing W. 79th Street. In addition, tree preservation fencing
must be installed at the limits of tree removal. All disturbed areas, as a result
of construction, must be seeded and mulched or sodded immediately after
grading to minimize erosion. Any off -site grading will require an easement
from the appropriate property owner.
12. All of the utility improvements are required to be constructed in accordance
with the City of Chanhassen's latest edition of Standard Specifications and
Detail Plates. Detailed construction plans, including plan and profile
drawings of the proposed utilities, are required to be submitted at the time of
final plat.
13. Staff is recommending that additional signage be installed alerting motorists
to the blind approach near the existing Hanus Building just west of the site.
c: Paul Oehme, City Engineer/Public Works Director.
gAeng\projwts\gateway east 2nd addition\prelintinary plat review.dm
CARVER
W�lTTER
CONSERVATION DISTRICT
�'.l%ng C4r` 09 East Frontage Road
y 1946 0r Waconia, MN 55387
Phone: 952-442-5101
�°4hhr goo°� Fax: 952-442-5497
httn://www.m.mmer.mn.us/SWCD/SWCD mainhtml
Mission Statement: To provide leadership in conservation and teach stewardship of the soil, water, and related resources
through a balanced, cooperative program that protects, restores, and improves those resources.
March 21, 2005
Robert Generous, Senior Planner
City of Chanhassen
7700 Market Boulevard
Chanhassen, MN 55317
Re: East Water Treatment Plant
Mr. Generous:
The SWCD has taken the opportunity to review the East Water Treatment Plant for the City of Chanhassen. The
plan reviewed is dated with a City Received stamp of March 8, 2005. Please review and consider the following
comments and suggestions regarding erosion control and sediment controls. While no information was received on
the disturbed area of the development; it is assumed over one acre of area is disturbed. Further, no erosion or
sediment control notes or details were found in the plan.
SWPPP
A SWPPP should be developed by SEH for the site which would encompass an erosion and sediment control plan.
The SWPPP is needed prior to applying for the NPDES permit. I have included an example SWPPP for reference.
Erosion Control
1. Temporary and permanent erosion control plans and details will be needed. Temporary erosion control
could consist of type 1 mulch and temporary seed mixes.
2. Erosion control blanket should be applied to the storm water pond and any disturbed areas between the
flared end sections and the pond.
3. Energy dissipation is needed at the flared end sections.
Sediment Control
1. Inlet protection is needed following installation. Wimco-type inlet controls are recommended.
2. Rock construction exit pad is needed from the site to 79`" street.
3. Street scraping and sweeping is needed.
4. Silt fence around the south and east side of the site will be needed. Chanhassen type 1 silt fence should be
adequate.
Storm Water
The flow path and velocity of the water from the flared end sections to the storm water should be looked at; erosion
of the area is a concern as the water flows over the site into the pond. The storm water pond appears to not have an
outlet on the plan.
Further review of the sediment and erosion controls can be done once a plan is completed. If there are any questions
or if I can be of further assistance please contact the SWCD office.
Sincerely,
Aaron Mlynek, CPESC
Urban Conservation Technician
c. Lori Haak, City of Chanhassen (email)
AN EQUAL OPPORTUNITY EMPLOYER
CITY OF
7700 Market Boulevard
MEMORANDUM
PO Box 147
Chanhassen, MR 55317
TO: Robert Generous, Senior Planner
Administration
952.227.11
Phone: 952.n7.i1W
FROM: Mark Littfin, Fire Marshal
Fax: 952.227.1110
DATE: March 16, 2005
Building Inspections
Phone: 952.227.1180
Fax: 952.227.1190
SUBJ: Request for land use amendment for parks and open space to
commercial subdivision approval for 2 lots and site plan review
Engineering
Phone:952.n7.1180
for a 12,500 square foot building for a water treatment plant and
sq g
Fax: 952.227.1170
an 8,100 square foot backwash tank. Applicant City of Chanhassen.
Finance
Planning Case; 05-12
g
Phone: 952.n7.1140
Fax: 952711.1110
I have reviewed the site plan for the above project. In order to comply with the
Pan a Reaeagon
Chanhassen Fire Department/Fire Prevention Division, I have the following fire code or
Phone: 952.227.1120
Fax: 952.227.1110
city ordinance/policy requirements. The site plan review is based on available
Recreation Center
information submitted at this time. As additional plans or changes are submitted, the
2310 Coulter Boulevard
appropriate code or policy items will be addressed.
Phone:952.227.1400
Fax:952.227.1404
1. Two additional fire hydrants have been required. I have had discussion with
Planning a
Assistant City Engineer, Matt Saam as to their location.
Natural Resources
Phone: 22n711
A 10-f space Y P
2. oot clear ace must be maintained around fire hydrants, i.e. street lamps,
Fax:952.n7.1110
.
trees, shrubs, bushes, Xcel Energy, Qwest, cable TV and transformer boxes.
Public Worts
This is to ensure that hydrants can be quickly located and safely operated by
1ne: Park
firefighters. Pursuant to Chanhassen CityOrdinance 9-1.
�
.227.1Road
Phone: 952.n7.13W
Fax 952.227.1310
3. Yellow curbing and "no parking fire lane" signs will be required. Contact
Senior center
Chanhassen Fire Marshal for exact location of yellow curbing and location of
Phom: 952.227,1125
Fax:952.227.1110
signs to be installed.
Web site MLfbe
www.ci.chanhassenmnus
gAsafetyUnl\plrev05-12
The City of 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.
City of Chanhassen
7700 Market Boulevard
1tt� Chanhassen, MN 55317
Alt L OF (952) 227-1100
Date: March 4, 2005
To: Development Plan Referral Agencies
From: Planning Department
By: Robert Generous, Senior Planner
Subject: Request for Land Use Amendment from Parks and Open Space to Commercial; Subdivision approval
for two lots and Site Plan Review for a 12,500 square -foot building for a Water Treatment Plant and an
8,100 square -foot Back Wash Tank. Applicant: City of Chanhassen
Planning Case: 05-12
The above described application for approval of a land development proposal was filed with the Chanhassen Planning
Department on March 4, 2005. The 60-day review period ends May 3, 2005.
In order for us to provide a complete analysis of issues for Planning Commission and City Council review, we would
appreciate your comments and recommendations concerning the impact of this proposal on traffic circulation, existing and
proposed future utility services, storm water drainage, and the need for acquiring public lands or easements for park sites,
street extensions or improvements, and utilities. Where specific needs or problems exist, we would like to have a written
report to this effect from the agency concerned so that we can make a recommendation to the Planning Commission and City
Council.
This application is scheduled for consideration by the Chanhassen Planning Commission on April 5, 2005 at 7:00 p.m in the
Council Chambers at Chanhassen City Hall. We would appreciate receiving your comments by no later than March 25,
2005. You may also appear at the Planning Commission meeting if you so desire. Your cooperation and assistance is
greatly appreciated.
1. City Departments:
a. City Engineer
b. City Attorney
c. City Park Director
d. Fire Marshal
e. Building Official
f. Water Resources Coordinator
g. Forester
2. Carver Soil & Water Conservation District
3. MN Dept. of Transportation
4. MN Dept. of Natural Resources
5. U.S. Army Corps of Engineers
6. U.S. Fish & Wildlife
Carver County
a. Engineer
b. Environmental Services
8. Watershed District Engineer
a. Riley -Purgatory -Bluff Creek
b. Lower Minnesota River
c. Minnehaha Creek
9. Telephone Company (Qwest or SprindUnited)
10. Electric Company (Xcel Energy or MN Valley)
11. Mediacom
12. CenterPoint Energy Minnegasco
13. MN Dept. of Health
0
CITY OF
CIIANIIASSEN
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 952227.1190
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 952.2271400
Fax 952.227.1404
Planning 3
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.chanhasseo.mn.us
•
MEMORANDUM
TO: Todd Gerhardt, City Manager
0
FROM: Bob Generous, Senior Planner
DATE: May 23, 2005 L
SUBJ: Final Plat Approval for Gateway East 2°d Addition
Planning Case No. 05-12
PROPOSAL SUMMARY
The applicant, City of Chanhassen, is requesting final plat approval for Gateway
East grid Addition creating two lots and one outlot. The proposal includes
approximately 3.94 acres. The development complies with the Highway and
Business Services District, BH, regulations. Approval requires a majority of City
Council present.
BACKGROUND
On April 25, 2005, the Chanhassen City Council approved the following:
Land Use Amendment from Parks and Open Space to Commercial;
Preliminary plat for Gateway East 2nd Addition creating two lots and one outlot,
plans prepared by Hanson Thorp Pellinen Olson, Inc., dated Febnaary 9, 2005,
revised February 26, 2005, subject to conditions;
And,
Site Plan Review for a 12,500 square -foot building for a water treatment plant and
an 8,100 square -foot back wash tank on Lot 1, Block 1, Gateway East 2°d Addition.
FINAL PLAT
PROPOSAL SUMMARY
The applicant is requesting final plat approval for two lots and one outlot.
GRADING, DRAINAGE & EROSION CONTROL
The existing site ranges from a high elevation of 978 in the west central portion of
the site down to a low point of 940 in the southeast corner. The plans propose to
grade about 60% of the site for a water treatment plant, a proposed street with a
cul-de-sac, and a stormwater pond. While the finished floor elevation of the
treatment plan is set at 969.0, the site cannot be graded down to this elevation
because of the existing pedestrian bridge. The development does a nice job of
�OdIOA
The City of Chanhassen • A growing community with clean lakes, quality schools, a champing downtown, thriving businesses, winding hails, and beautiful parks. A groat place to live, work, and play.
Todd Gerhardt
Gateway East 2"d Addition
May 23, 2005
Page 2
working with this constraint and matching into the existing 978 elevation along the east side of
the building. Because of the need to hold the 978 ground elevation near the pedestrian bridge, a
retaining wall (6' —10') will be required along the north side of the backwash tanks adjacent to
the south side of the street and trail. This retaining wall will require a building permit from the
City's Building Department.
The existing site drainage is encompassed within two different drainage areas. Under existing
conditions, the westernmost portion of the site drains off site to the west while the remainder of
the site drains to an existing storm sewer culvert in the southeast comer of the site. Under
developed conditions, the applicant is proposing to capture the eastern half of the street drainage,
all of the Lot 2 drainage, and a large majority of the Lot 1 drainage. This stormwater will be
conveyed via storm sewer and overland flow to the proposed pond in the southeasterly corner of
the site for treatment. The remaining impervious runoff from the street and treatment plant will
drain to an existing storm sewer in West 79th Street which flows to an existing pond in the
downtown area. The proposed pond must be designed to National Urban Runoff Program
(NURP) standards with maximum 3:1 side slopes and a 10:1 safety bench at the NWL. An outlet
control structure, per City Detail Plate No. 3109, must be installed at the outlet of the pond.
Drainage calculations for the site have been submitted. The applicant is required to meet the
existing site runoff rates for the 10-year and 100-year, 24-hour storm events.
Proposed erosion control must be developed in accordance with the City's Best Management
Practice Handbook (BMPH). Staff recommends that Type I silt fence be used along the entire
south and west construction limits. A rock construction entrance, per City Detail Plate No. 5301,
must be added to the plans off of existing West 79th Street. In addition, tree preservation
fencing must be installed at the limits of tree removal. All disturbed areas, as a result of
construction, must be seeded and mulched or sodded immediately after grading to minimize
erosion. Any off -site grading will require an easement from the appropriate property owner.
These requirements are included in the construction contract.
UTILITIES
Municipal sanitary sewer is available to the site from the south. There is an existing sanitary
sewer main along the southern property line which the applicant is proposing to connect to an
existing sanitary manhole. As for water, the treatment plant itself will have multiple water lines
coming to/from the building. These watermains include typical distribution mains, raw
watermains to carry water directly from the wells to the treatment plant, a reclaim watermain
which will carry a portion of the filter backwash water back to the plant for treatment, and
spraywash mains which give the Utility Department staff the ability to clean out the backwash
tanks. The actual potable water service to the plant will come from the south side of the building
off a relocated watermain. All of the utility improvements are required to be constructed in
accordance with the City of Chanhassen's latest edition of Standard Specifications and Detail
Plates.
Todd Gerhardt
Gateway East 2"d Addition
May 23, 2005
Page 3
STREETS
The plans propose on extending West 79th Street approximately 250 feet east of its current
terminus to serve the two proposed lots. Because this street will be extended within public or
City -owned property, additional public right-of-way is not necessary. The existing pavement
width of West 79th Street is 27 feet from back -of -curb to back -of -curb. The standard pavement
width for public streets in commerciallbusiness districts in Chanhassen is 36 feet from back -of -
curb to back -of -curb with a 48-foot cul-de-sac radius. In this case, staff is fine with the street
width staying at 27 feet in order to stay consistent with the existing street width to the west. The
cul-de-sac pavement radius is proposed at 60-feet. This radius exceeds the current standard and
will provide greater area for semi -trucks to turnaround.
With the expected increase in traffic on West 79th Street from deliveries to the treatment plant
and the future development of Lot 2, staff is recommending that additional signage be installed
near the existing Hanus Building just west of the site. The signage is needed because of the
existing blind approach to motorists leaving Brown's Auto and conversely to motorists heading
west from the new treatment plant. This requirement is included in the contract documents.
LANDSCAPING
The landscape plan for the plat is being provided with the water treatment plant and has been
developed to reflect the natural materials used in the building. Native trees, shrubs, and grasses
as well as non-native perennials and shrubs have been utilized to create a naturalized planting
plan. The guiding factors for selection and placement were attractiveness and low -maintenance.
Additional landscaping will be provided in the future as part of the site plan for Lot 2.
COMPLIANCE TABLE
AREA (sq. ft)
Frontage (ft.)
Depth (ft.)
Setbacks: Front,
Side Rear (ft.)
Code
20,000
100
150
25,10,20
Lot 1
108,404
565
195
25, 10, NA (double
front)
Lot 2
60537
151
302
25,10 NA (double
front)
Outlot A
2,890
Total
171 1
REVIEW OF CONDITIONS OF APPROVAL
1. The applicant is required to meet the existing site runoff rates for the 10-year and 100-year, 24-
hour storm events. The proposed pond must be designed to National Urban Runoff Program
(NURP) standards.
* This condition has been met.
Todd Gerhardt
Gateway East 2"d Addition
May 23, 2005
Page 4
2. The storm sewer must be designed for a 10-year, 24-hour storm event. Submit storm sewer
sizing calculations and drainage map prior to final plat for staff review and approval.
* This condition has been met.
3. Drainage and utility easements must be dedicated on the final plat over the public stone
drainage system including ponds, drainage swales, and wetlands up to the 100-year flood level.
The minimum easement width must be 20 feet wide.
* This condition has been met.
4. An access easement for the benefit of Lot 2 shall be recorded across Lot 1.
* This condition still applies.
5. Submit a separate site plan, grading/drainageterosion control plan, and utility plan.
* This condition has been met.
6. Pedestrian ramps per City Detail Plate No. 5215 are required at the street crossing of the
proposed trail.
* This condition has been met.
On the grading plan:
a. Show all existing and proposed easements.
b. Show the benchmark used for the site survey.
c. Show all proposed contour lines in bold.
d. Show the emergency overflow elevation from the proposed pond.
e. Show all proposed contours on the north side of the proposed trail and on Lot 2.
f. Do not show the proposed sanitary/water lines on the grading plan.
g. Show the proposed storm sewer to/from the pond.
* This condition has been met.
8. On the site plan, show the dimensions for street width, cul-de-sac radius, parking stalls, trail, etc.
* This condition still applies.
9. On the utility plan:
a. Show all existing and proposed utilities.
b. Show the proposed rim and invert elevations for all sanitary and storm sewer.
* This condition has been met.
10. The proposed retaining wall along the north side of the backwash tanks will require a building
permit from the City's Building Department.
E
Todd Gerhardt
Gateway East 2nd Addition
May 23, 2005
Page 5
* This condition still applies.
11. Proposed erosion control must be developed in accordance with the City's Best Management
Practice Handbook (BMPH). Staff recommends that Type I silt fence be used along the entire
south and west construction limits. A rock construction entrance, per City Detail Plate No.
5301, must be added to the plans off of existing West 79th Street. In addition, tree preservation
fencing must be installed at the limits of tree removal. All disturbed areas, as a result of
construction, must be seeded and mulched or sodded immediately after grading to minimize
erosion. Any off -site grading will require an easement from the appropriate property owner.
* This condition still applies.
12. All of the utility improvements are required to be constructed in accordance with the City of
Chanhassen's latest edition of Standard Specifications and Detail Plates. Detailed construction
plans, including plan and profile drawings of the proposed utilities, are required to be submitted
at the time of final plat.
* This condition has been met.
13. Additional signage shall be installed alerting motorists to the blind approach near the existing
Hanus Building just west of the site.
* This condition still applies.
14. The applicant shall work with the watershed district to provide regional water quality
infrastructure on this site.
* This condition still applies.
15. The flow path and velocity of the water from the flared end sections to the storm water shall be
evaluated.
* This condition has been met.
16. A Storm Water Pollution Prevention Plan (SWPPP) encompassing an erosion and sediment
control plan shall be developed for the site.
* This condition still applies.
17. Temporary and permanent erosion control plans and details shall be developed.
* This condition has been met.
18. Erosion control blanket shall be applied to the storm water pond and any disturbed areas
between the flared end sections and the pond, as well as on any slopes greater than or equal to
3:1.
Todd Gerhardt
Gateway East 24d Addition
May 23, 2005
Page 6
* This condition still applies.
19. Energy dissipation shall be provided at the flared end sections.
* This condition still applies.
20. 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 Time (Maximum time an area can
Steeper than 3:1 7 days remain open when the area
10:1 to 3:1 14 daysis not actively being worked.)
Flatter than 10:1 21 days
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.
* This condition still applies.
21. Street cleaning of soil tracked onto public streets shall include daily street scraping and street
sweeping as -needed.
* This condition still applies.
22. Inlet protection shall be provided following installation. Wimco-type inlet controls are
recommended.
* This condition still applies.
23. A rock construction entrance shall be provided from the site to West 79th Street.
* This condition has been met.
24. Chanhassen Type I silt fence shall be installed around the south and east sides of the site.
* This condition has been met.
25. 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,
Minnesota Department of Natural Resources (for dewatering), Minnesota Department of Health,
Minnesota Department of Transportation) and comply with their conditions of approval.
* This condition still applies.
Todd Gerhardt
Gateway East 2"d Addition
May 23, 2005
Page 7
RECOMMENDATION
Staff recommends that the City Council adopt the following motion:
"The Chanhassen City Council approves the Final Plat for Gateway East 2°d Addition creating two
lots and one outlot (plans prepared by Hansen Thorp Pellinen & Olson, Inc.) subject to the
following conditions:
1. An access easement for the benefit of Lot 2 shall be recorded across Lot 1.
2. On the site plan, show the dimensions for street width, cul-de-sac radius, parking stalls, trail, etc.
3. The proposed retaining wall along the north side of the backwash tanks will require a building
permit from the City's Building Department.
4. Proposed erosion control must be developed in accordance with the City s Best Management
Practice Handbook (BMPH). Staff recommends that Type I silt fence be used along the entire
south and west construction limits. A rock construction entrance, per City Detail Plate No.
5301, must be added to the plans off of existing West 79th Street. In addition, tree preservation
fencing must be installed at the limits of tree removal. All disturbed areas, as a result of
construction, must be seeded and mulched or sodded immediately after grading to minimize
erosion. Any off -site grading will require an easement from the appropriate property owner.
5. Additional signage shall be installed alerting motorists to the blind approach near the existing
Hanus Building just west of the site.
6. The applicant shall work with the watershed district to provide regional water quality
infrastructure on this site.
7. The flow path and velocity of the water from the flared end sections to the storm water shall be
evaluated.
S. A Storm Water Pollution Prevention Plan (SWPPP) encompassing an erosion and sediment
control plan shall be developed for the site.
9. Erosion control blanket shall be applied to the storm water pond and any disturbed areas
between the flared end sections and the pond, as well as on any slopes greater than or equal to
3:1.
10. Energy dissipation shall be provided at the flared end sections.
11. All exposed soil areas shall have temporary erosion protection or permanent cover year round,
according to the following table of slopes and time frames:
Todd Gerhardt
Gateway East 2nd Addition
May 23, 2005
Page 8
Type of Slope
Time (Maximum time an area can
Steeper than 3:1
7 days remain open when the area
10:1 to 3:1
14 daysis not actively being worked.)
Flatter than 10:1
21 days
12. 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.
13. Street cleaning of soil tracked onto public streets shall include daily street scraping and street
sweeping as -needed.
14. Inlet protection shall be provided following installation. Wimco-type inlet controls are
recommended
15. 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,
Minnesota Department of Natural Resources (for dewatering), Minnesota Department of Health,
and Minnesota Department of Transportation) and comply with their conditions of approval.
ATTACHMENTS
1. Final plat.
glplanl2005 planning casal05-12 water treatment plan[Vinal plat gateway east 2nd.dm
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CITY OF
CIIANIIASSEN
770o Market Boulevard
PO Box 147
Chanhassen, MN 55317
Administration
Phone: 952.227.1100
Fax: 952.227.1110
Building Inspections
Phone.952227.1180
Fax: 952 227.1190
Engineering
Phone: 952.227.1160
Fax: 952.227.1170
Finance
Phone: 952.227.1140
Fax: 952,227.1110
MEMORANDUM
TO: Todd Gerhardt, City Manager
FROM: Bob Generous, Senior Planner
DATE: April 25, 2005
SUBJ: Planning Case #05-12: Land Use Amendment, Subdivision and
Site Plan Approvals: Gateway East 2°d and East Water
Treatment Plant
EXECUTIVE SUMMARY
Request for Land Use Amendment from Parks and Open Space to Commercial;
Subdivision approval for two lots and one outlot and Site Plan Review for a 12,500
square -foot building for a water treatment plant and an 8,100 square -foot back
wash tank.
Park & Recreation
ACTION REQUIRED
Phone: 952.2271120
Fax:952.227.1110
City Council approval requires a majority of City Council present.
Recreation Center
2310 Coulter Boulevard
PLANNING COMMISSION SUMMARY
Phone: 952.227.14f1O
Fax:952.227.1404
The Planning Commission held a public hearing on April 5, 2005, to review the
Planning a
proposed development. The Planning Commission voted 7 to 0 to approve the
Natural Resources
Phone:952,227.1130
proposed project including the land use amendment, subdivision and site plan. The
Fax:952.227.1110
summary and verbatim minutes are included as item I of the April 25, 2005 City
Council agenda.
Public Works
1591 Park Road
Phone: 952.227.13W
RECOMMENDATION
Fax 952227.1310
Senior Center
Staff recommends adoption of the motions beginning on page 8 of the staff
Phone:952.227.1125
report dated April 5, 2005.
Fax: 952 227.1110
Web site
ATTACHMENTS
wwx.ci.chanhassen.mn.us
1. Planning Commission Staff Report Dated April 5, 2005.
2. Letter from Juanita Voigt of MnDOT dated April 8, 2005.
gAptanx2005 planning casesx05-12 water treatment plantxexecutive summary.doc
The City of Chanhassen • A growing community with clean lakes, quality schools, a charming downtown, thriving businesses, winding trails, and beautiful parks. A l eat place to live, work, and play.
CITY OF CHANHASSEN
STAFF REPORT
PC DA10 April 5, 2005 [4]
CC DATE: April 25, 2005
REVIEW DEADLINE: May 3, 2005
CASE #: Planning Case #05-12
BY: RG, LH, ML, MS, IS, ST
PROPOSAL: Request for Land Use Amendment from Parks and Open Space to Commercial;
Subdivision approval for two lots, one outlot gat; and
Site Plan Review for a 12,500 square -foot building for a water treatment plant and an
8,100 square -foot back wash tank.
LOCATION: End of West 79`s Street between Highway 5 and the Twin Cities and Western Railroad
right-of-way.
APPLICANT: City of Chanhassen
7700 Market Boulevard
P. O. Box 147
Chanhassen, MN 55317
(952)227-1100
PRESENT ZONING: Highway and Business Services District, BH
2020 LAND USE PLAN: Parks and Open Space
ACREAGE: 3.94 DENSITY: F.A.R.0.18
SUMMARY OF REQUEST: The City is requesting subdivision approval to create two lots and one
outlot at the end of West 70 Street. On one lot, a water treatment facility is being proposed. The
second lot can either be sold or used by the City at a later date. The land use amendment would bring
the existing zoning and proposed and potential future uses of the property into compliance with one
another. The site plan approval is for the construction of the east water treatment plant with a variance
from the setback to West 79 h Street.
LEVEL OF CITY DISCRETION IN DECISION -MAKING:
The City's discretion in approving or denying a preliminary plat is limited to whether or not the
proposed plat meets the standards outlined in the Subdivision Regulations and Zoning Ordinance. If it
meets these standards, the City must approve the preliminary plat. This is a quasi-judicial decision.
The City has a relatively high level of discretion in approving amendments because the City is acting in
its legislative or policy making capacity. An amendment must be consistent with the City's
Comprehensive Plan.
The City's discretion in approving or denying a site plan is limited to whether or not the proposed
project complies with Zoning Ordinance requirements. If it meets these standards, the City must then
approve the site plan. This is a quasi-judicial decision.
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Water Treatment Plant
Planning Case No. 05-12
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Planning Commission
Planning Case No. 05-12
April 5, 2005
Page 2
PROPOSAUSUMMARY
The development proposal includes the subdivision of the three parcels constituting the property
creating two lots and an outiot with an easement for the extension of West 79'" Street. Outlot A
contains a parking area. Lot 1 is proposed for the East Water Treatment Plant. Lot 2 may be sold
as a commercial property or used by the City at a later date. The property is zoned Highway and
Business Services District, but is guided parks and open space in the City's comprehensive plan.
In order to clarify the use of the site and make the land use consistent with the zoning of the
property, the land is being re -guided to commercial use.
The City is proposing a 12,500 square foot, one-story, 24-foot high water treatment facility with
an 8,100 square -foot back wash tank. The building meets the setback from Highway 5 and West
79m Street. Building materials consist of a light brown brick, limestone colored block, beige
concrete sill accent and glass block windows. The building elevations are highly articulated with
many horizontal and vertical recesses and projections in the building fagade. The roof consists of
standing seam metal over the eastern end of the building, a flat roof in the central portions of the
building, and a barrel metal roof over the loading dock area. A security system will be installed as
part of the building construction. The extent of the security system is still being evaluated.
The site is located on the eastern entrance to the City's downtown. The property becomes narrower
from west to east going from a width at its widest of approximately 195 feet down to a width of 100
feet. North of the site is the Twin City and Western Railroad and West 780'Street and the end of
West 79's Street. Highway 101 abuts the property to the east and Highway 5 abuts the property to
the south. The old Hanus building is located west of the site. The Highway 5 pedestrian bridge
intersects the western portion of the property, east of the proposed Water Treatment Plant building.
The high point of the site is at the pedestrian bridge at an elevation of 978 and then slopes to the
east, west and south. The low point on the property is in the southeast comer of the site at an
elevation of 940. Trees are scattered on the property with no significant natural stands. A large
grouping of pines is located in the southwest comer of the site, which are proposed to be preserved.
The proposed development complies with the City's zoning and subdivision ordinance with the
variance for the setback to West 79i° Street. Staff is recommending approval of the proposed
development.
BACKGROUND
The site was previously owned by Apple Valley Red-E-Mix. In 1992, the City initiated the
condemnation of the former Apple Valley Red-E-Mix parcel. In October 1993, Apple Valley Red-
E-Mix vacated the property. In June 1995, the City finalized the purchase of the site.
On April 4, 1983, the City approved a non -conforming use permit, a conditional use permit (#82-
4) and a variance to permit a washout system at the Apple Valley Red-E-Mix site.
The eastern end of the site was previously owned and used for a Taco Shop. hi October 1991, the
City initiated the condemnation of the Taco Shop parcel in conjunction with the realignment of the
U
Planning Commission
Planning Case No. 05-12
April 5, 2005
Page 3
intersection of Highway 101 and West 78"' Street. On May 21, 1993, the City finalized the
acquisition of the parcel.
The pedestrian bridge was constricted over Highway 5 in 1995.
APPLICABLE REGULATIONS
Chapter 18, Subdivisions
Chapter 20, Article II, Division 6, Site Plan Review
Chapter 20, Article XVII, `BIT' Highway and Business Services District
Chapter 20, Article XXIII, Division 7, Design Standards for Commercial, Industrial and Office -
Institutional Developments
COMPREHENSIVE PLAN AMENDMENT
The property is currently zoned Commercial, BH, but is guided for parks and open space. At one
time, it was thought that this area would be used as a park -like, open space gateway to the City of
Chanhassen. However, the site will serve the City as a water treatment facility site with an
additional lot that could be sold for development or used by the City. Utility services are a
permitted use in the BH district. The land use amendment will bring the comprehensive plan and
potential use of the site into compliance with each other.
GENERAL SITE PLAN/ARCHITECTURE
ARCHITECTURAL COMPLIANCE
Size Portion Placement
The building entrance is located off West 79`s Street. The building entrance is articulated with
glass and accessed via a raised plaza.
Material and Detail
Building materials consist of high -quality materials including a light brown brick, limestone
colored block, beige concrete sill accent and glass block windows. The building elevations are
highly articulated with many horizontal and vertical recesses and projections in the building fagade.
Height and Roof Design
Building height is one story at 24 feet. Pitched roof elements include both a sloped roof of metal
standing seam and a metal barrel roof. Height is limited to two stories in the BH zoning district.
Planning Commission
Planning Case No. 05-12
April 5, 2005
Page 4
Facade Transparency
50 percent of the first floor elevation that is viewed by the public includes transparent windows
and or doors. All other areas shall include landscaping material and architectural detailing and
articulation.
Site Furnishing
Community features include landscaping, lighting, and access to the pedestrian bridge. The
building has a raised plaza at its entrance.
Loading Areas, Refuse Area, etc.
Screening of service yards, and truck parking/loading areas cannot be accommodated due to the
constraints of the site and the function of the building. Access to the site is limited to West 79a'
Street.
Landscaping and Tree Preservation
The landscape plan for the water treatment plant has been developed to reflect the natural
materials used in the building. Native trees, shrubs, and grasses as well as non-native perennials
and shrubs have been utilized to create a naturalized planting plan. The guiding factors for
selection and placement were attractiveness and low -maintenance.
Bufferyard requirements:
Required
Proposed
Highway 5
3 canopy trees
3 canopy
bufferyard B — 250'
5 understory trees
23 understory
5 shrubs
0 shrubs
North property line
3 canopy trees
7 canopy
bufferyard B — 250'
5 understory trees
6 understory
5 shrubs
40+ shrubs
East property line.
0 canopy tree
0 canopy trees
bufferyard A —150'
2 understory trees
7 understory
2 shrubs
0 shrubs
West property line
2 canopy trees
1 canopy
bufferyard A —175'
2 understory trees
10 understory
4 shrubs
40+ shrubs
Where bufferyard requirements have not been met, existing vegetation, elevation change and/or
distance makes up for the minimum requirements.
Existing trees on the site include spruce, Austrian pine, and maple. Some of the maples may be
able to be transplanted to another site. Staff will inspect the trees and mark ones that can be
El
Planning Commission
Planning Case No. 05-12
April 5, 2005
Page 5
moved. Once the ground has thawed, staff will coordinate the move. The Austrian pines along
Highway 5 provide an excellent buffer for the plant and neighboring building and cell tower
base. Staff recommends that as many as possible of these trees be saved. Trees lost due to
construction will be replaced.
There is a large expanse of grass over the underground tanks. The current proposal includes sod
to be installed. Staff would like to explore the possibility of installing a planting of native
grasses or other ground cover that would alleviate the need for mowing. City staff and the
consultant will determine whether of not a shorter prairie grass or low ground cover would be
suitable in this area.
Currently, there is a naturalized area along the slope leading down to Highway 5. Staff is
recommending that this feature remain in order to eliminate maintenance requirements in this
steep area.
Staff recommends that, where feasible, sod be replaced by grass seed. Exceptions would include
along the curb line, trails and adjacent to the building.
Lot Frontage and Parking location
The property fronts on both Highway 5 and West 79`s Street. Site access and parking are
provided off West 79t° street. Parking is provided off West 79`s Street.
COMPLIANCE TABLE (Water Treatment Plant)
Front
setback
Side Setback
Rear Setback
Building
Height
Site
Coverage
Code
25'
10,
20'
2-story
65 %
Proposed
33'
13'
NA
1-story46
%
SUBDIVLSION REVIEW
GRADING, DRAINAGE & EROSION CONTROL
The existing site ranges from a high elevation of 978 in the west central portion of the site down
to a low point of 940 in the southeast comer. The plans propose to grade about 60% of the site
for a water treatment plant, a proposed street with a cul-de-sac, and a stormwater pond. While
the finished floor elevation of the treatment plan is set at 969.0, the site cannot be graded down
to this elevation because of the existing pedestrian bridge. The applicant has done a nice job of
working with this constraint and matching into the existing 978 elevation along the east side of
the building. Because of the need to hold the 978 ground elevation near the pedestrian bridge, a
retaining wall (6' —10) will be required along the north side of the backwash tanks adjacent to
the south side of the street and trail. This retaining wall will require a building permit from the
City's Building Department.
Planning Commission
Planning Case No. 05-12
April 5, 2005
Page 6
The existing site drainage is encompassed within two different drainage areas. Under existing
conditions, the westernmost portion of the site drains off site to the west while the remainder of
the site drains to an existing storm sewer culvert in the southeast corner of the site. Under
developed conditions, the applicant is proposing to capture the eastern half of the street drainage,
all of the Lot 2 drainage and a large majority of the Lot 1 drainage. This stormwater will be
conveyed via storm sewer and overland flow to the proposed pond in the southeasterly corner of
the site for treatment. The remaining impervious surface from the street and treatment plant will
drain to ane existing storm sewer in West 79's Street, which flows to an existing pond in the
downtown area. The proposed pond must be designed to National Urban Runoff Program
(NURP) standards with maximum 3:1 side slopes and a 10:1 safety bench at the NWL. An outlet
control structure, per City Detail Plate No. 3109, must be installed at the outlet of the pond.
Drainage calculations for the site have been submitted and only minor changes remain. The
applicant is required to meet the existing site runoff rates for the 10-year and 100-year, 24-hour
storm events. Storm sewer sizing calculations must be submitted prior to final plat application.
The storm sewer must be sized for a 10-year, 24-hour storm event. Drainage and utility
easements must 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.
Proposed erosion control must be developed in accordance with the City's Best Management
Practice Handbook (BMPH). Staff recommends that Type I silt fence be used along the entire
south and west construction limits. A rock construction entrance, per City Detail Plate No. 5301,
must be added to the plans off of existing West 79"s Street. In addition, tree preservation fencing
must be installed at the limits of tree removal. All disturbed areas, as a result of construction,
must be seeded and mulched or sodded immediately after grading to minimize erosion. Any off -
site grading will require an easement from the appropriate property owner.
Wetlands
No jurisdictional wetlands exist on -site.
Storm Water Management
The City's Surface Water Management Plan shows a regional storm water facility on this
property (RM-P5.2). The Riley -Purgatory -Bluff Creek Watershed District is currently designing
stormwater-related improvements within the Rice Marsh Lake subwatershed. Preliminary
discussions with the watershed district have suggested construction of a small regional
stormwater pond on this site. The applicant should work with the watershed district to provide
regional water quality infrastructure on this site.
The flow path and velocity of the water from the flared end sections to the storm water should be
evaluated. Erosion of the area is a concern as the water flows over the site into the pond.
A Storm Water Pollution Prevention Plan (SWPPP) encompassing an erosion and sediment
control plan should be developed for the site. The SWPPP is needed prior to applying for the
NPDES permit.
Planning Commission
Planning Case No. 05-12
Aprils, 2005
Page 7
Erosion Control
Temporary and permanent erosion control plans and details should be developed. Temporary
erosion control could consist of Type 1 mulch and temporary seed mixes. Erosion control
blanket should be applied to the storm water pond and any disturbed areas between the flared end
sections and the pond. Energy dissipation is needed at the flared end sections. 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 Sloe
Time
Steeper than 3:1
7 days
10:1 to 3:1
14 days
Flatter than 10:1
21 days
(Maximum time an area can
remain open when the area
is not actively being worked.)
These areas include constructed stormwater management pond side slopes, and any exposed soil
areas with a positive slope to a stormwater 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.
Sediment Control
Street cleaning of soil tracked onto public streets shall include daily street scraping and street
sweeping as needed. Inlet protection should be provided following installation. Wimco-type
inlet controls are recommended. A rock construction entrance is needed from the site to West
79th Street. Chanhassen Type 1 silt fence should be installed around the south and east sides of
the site.
Other Agencies
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,
Minnesota Department of Natural Resources (for dewatering)) and comply with their conditions
of approval.
Municipal sanitary sewer is available to the site from the south. There is an existing sanitary
sewer main along the southern property line which the applicant is proposing to connect a
service line to. This connection will require the installation of a manhole on the existing sewer
main. As for water, the treatment plant itself will have multiple water lines coming to/from the
building. These watermains include typical distribution mains, raw watermains to carry water
directly from the wells to the treatment plant, a reclaim watermain which will carry a portion of
the filter backwash water back to the plant for treatment, and spraywash mains which give the
Utility Department staff the ability to clean out the backwash tanks. The actual potable water
Planning Commission
Planning Case No. 05-12
April5, 2005
Page 8
service to the plant will come from the south side of the building off a relocated watermain. All
of the utility improvements are required to be constructed in accordance with the City of
Chanhassen's latest edition of Standard Specifications and Detail Plates. Detailed construction
plans, including plan and profile drawings of the proposed utilities, are required to be submitted
at the time of final plat.
STREETS
The plans propose on extending West 79`s Street approximately 250 feet east of its current
terminus to serve the two proposed lots. Because this street will be extended within public or
City -owned property, additional public right-of-way is not necessary. An access easement for
the benefit of Lot 2 shall be recorded across Lot 1. The existing pavement width of West 79"'
Street is 27 feet from back -of -curb to back -of -curb. The standard pavement width for public
streets in commercial/business districts in Chanhassen is 36 feet from back -of -curb to back -of -
curb with a 48-foot cul-de-sac radius. In this case, staff is fine with the street width staying at 27
feet in order to stay consistent with the existing street width to the west. The cul-de-sac
pavement radius is proposed at 60-feet. This radius exceeds the current standard and will
provide greater area for semi -trucks to turnaround.
With the expected increase in traffic on West 79`s Street from deliveries to the treatment plant
and the future development of Lot 2, staff is recommending that additional signage be installed
near the existing Hanus Building just west of the site. The signage is needed because of the
existing blind approach to motorists leaving Brown's Auto and conversely to motorists heading
west from the new treatment plant.
COMPLIANCE TABLE
AREA (sq. ft.)
Frontage (ft,)
Depth (ft.)
Setbacks: Front,
Side, Rear (ft.)
Code
20,000
100
150
25,10, 20
Lot 1
108,404
565
195
25, 10, NA
(double front)
Lot 2
60,537
151
302
25, 10 NA
(double front)
Outlot A
12,890
Total
1171,831
RECOMMENDATION
Staff recommends that the Planning Gammissim City Council adopt the following three motions:
A. "The Chanhassen City Council approves the
Land Use Amendment from Parks and Open Space to Commercial contingent upon Metropolitan
Council Review."
Planning Commission
Planning Case No. 05-12
Aprils, 2005
Page 9
B. "The Chanhassen City Council approves the
11
preliminaryXlat for Gateway East 2nd Addition creating two lots and one outlot ei-fi#4 e€ w",
€sr- W@st 49 -Sheet, plans prepared by Hanson Thorp Pellinen Olson, Inc., dated February 9, 2005,
revised February 26, 2005, based on the findings of fact attached to this report and subject to the
following conditions:
1. The applicant is required to meet the existing site runoff rates for the 10-year and 100-year,
24-hour storm events. The proposed pond must be designed to National Urban Runoff
Program (NURP) standards.
2. The storm sewer must be designed for a 10-year, 24-hour storm event. Submit storm sewer
sizing calculations and drainage map prior to final plat for staff review and approval.
3. Drainage and utility easements must 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 easement width must be 20 feet wide.
4. An access easement for the benefit of Lot 2 shall be recorded across Lot 1.
5. Submit a separate site plan, grading/drainage/erosion control plan, and utility plan.
6. Pedestrian ramps per City Detail Plate No. 5215 are required at the street crossing of the
proposed trail.
On the grading plan:
a. Show all existing and proposed easements.
In. Show the benchmark used for the site survey.
c. Show all proposed contour lines in bold.
d. Show the emergency overflow elevation from the proposed pond.
e. Show all proposed contours on the north side of the proposed trail and on Lot 2.
f. Do not show the proposed sanitary/water lines on the grading plan.
g. Show the proposed storm sewer to/from the pond.
8. On the site plan, show the dimensions for street width, cul-de-sac radius, parking stalls, trail,
etc.
9. On the utility plan:
a. Show all existing and proposed utilities.
b. Show the proposed rim and invert elevations for all sanitary and storm sewer.
10. The proposed retaining wall along the north side of the backwash tanks will require a
building permit from the City's Building Department.
11. Proposed erosion control must be developed in accordance with the City's Best Management
Practice Handbook (BMPH). Staff recommends that Type I silt fence be used along the
Planning Commission
Planning Case No. 05-12
April 5, 2005
Page 10
entire south and west construction limits. A rock construction entrance, per City Detail Plate
No. 5301, must be added to the plans off of existing West 79t6 Street. In addition, tree
preservation fencing must be installed at the limits of tree removal. All disturbed areas, as a
result of construction, must be seeded and mulched or sodded immediately after grading to
minimize erosion. Any off -site grading will require an easement from the appropriate
property owner.
12. All of the utility improvements are required to be constructed in accordance with the City of
Chanhassen's latest edition of Standard Specifications and Detail Plates. Detailed
construction plans, including plan and profile drawings of the proposed utilities, are required
to be submitted at the time of final plat.
13. Additional signage shall be installed alerting motorists to the blind approach near the existing
Hanus Building just west of the site.
14. The applicant shall work with the watershed district to provide regional water quality
infrastructure on this site.
15. The flow path and velocity of the water from the flared end sections to the storm water shall
be evaluated.
16. A Storm Water Pollution Prevention Plan (SWPPP) encompassing an erosion and sediment
control plan shall be developed for the site.
17. Temporary and permanent erosion control plans and details shall be developed.
18. Erosion control blanket shall be applied to the storm water pond and any disturbed areas
between the flared end sections and the pond, as well as on any slopes greater than or equal
to 3:1.
19. Energy dissipation shall be provided at the flared end sections.
20. 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 Slone Time (Maximum time an area can
Steeper than 3:1 7 days remain open when the area
10:1 to 3:1 14 days is not actively being worked.)
Flatter than 10:1 21 days
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.
Planning Commission
Planning Case No. 05-12
April 5, 2005
Page 11
21. Street cleaning of soil tracked onto public streets shall include daily street scraping and street
sweeping as -needed.
22. Inlet protection shall be provided following installation. Wimco-type inlet controls are
recommended.
23. A rock construction entrance shall be provided from the site to West 79d' Street.
24. Chanhassen Type I silt fence shall be installed around the south and east sides of the site.
25. 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,
Minnesota Department of Natural Resources (for dewatering), Minnesota Department of
Health, Minnesota Department of Transportation) and comply with their conditions of
approval:,
C. "The Chanhassen &anning Commission feeoWARends apprsvai a City Council approves the
Site Plan Review for a 12,500 square -foot building for a water treatment plant and an 8,100 square -
foot back wash tank on Lot 1, Block 1, Gateway East 2°d Addition, based on the findings of fact
attached to this report and subject to the following conditions:
1. Tree protection fencing will be required at the edge of grading limits in the southwest corner
of the property prior to any grading.
2. Staff will coordinate the transplanting of any existing maples prior to construction.
3. City staff and the water treatment plant consultants will research and determine if alternative
ground covers can be used over the underground tanks.
4. Where appropriate, seeding will replace sod with the exception of along the curb line, trails
and adjacent to the building.
5. The building must be protected with an automatic fire sprinkler system.
6. The building plans must be prepared and signed by design professionals licensed in the State of
Minnesota.
7. One accessible parking space with an access aisle must be provided.
8. The west wall of the building must be of one -hour fire -resistive construction as it is located less
than 30 feet from the property line. Openings in this wall must be in accordance with the
building code.
9. The building owner and or their representatives shall meet with the Inspections Division to
discuss plan review and permit procedures.
Planning Commission
Planning Case No. 05-12
April5, 2005
Page 12
10. A site survey must be submitted in conjunction with the building permit application."
ATTACHMENTS:
1. Findings of Fact.
2. Reduced Copy Preliminary Plat.
3. Reduced Copy Site Plan Utility Plan (Sheet Cl).
4. Reduced Copy Site Plan Utility Plan (Sheet C2).
5. Reduced Copy Site Plan Utility Plan (Sheet C3).
6. Reduced Copy Exterior Elevations (North and West).
7. Reduced Copy Exterior Elevations (South and East).
8. Affidavit of Mailing of Public Hearing Notice.
g.Nplan\2005 planning cases105-12 water treatment plarthstaff report wtp.doc
M
CITY OF CHANHASSEN
CARVER AND HENNEPIN COUNTIES, MINNESOTA
FINDINGS OF FACT
AND RECOMMENDATION
IN RE:
Application of City of Chanhassen
Subdivision, Land Use Amendment and Site Plan Review
On April 5, 2005, the Chanhassen Planning Commission met at its regularly schedule meeting to consider the
application of the City of Chanhassen for a land use amendment from Parks and Open Space to Commercial,
preliminary plat approval creating two lots and one outlot and site plan approval. The Planning Commission
conducted a public hearing on the proposed subdivision preceded by published and mailed notice. The Planning
Commission heard testimony from all interested persons wishing to speak and now makes the following:
FINDINGS OF FACT
1. The property is currently zoned Highway and Business Services District, BH.
2. The property is guided in the Land Use Plan for Parks and Open Space.
3. The legal description of the property is: Gateway East 2°d Addition
4. The Subdivision Ordinance directs the Planning Commission to consider seven possible adverse affects of
the proposed subdivision. The seven (7) affects and our findings regarding them are:
(1) The proposed subdivision is consistent with the zoning ordinance;
(2) The proposed subdivision is consistent with all applicable city, county and regional plans including but not
limited to the city's comprehensive plan;
(3) The physical characteristics of the site, including but not limited to topography, soils, vegetation,
susceptibility to erosion and siltation, susceptibility to flooding, and storm water drainage are suitable for
the proposed development;
(4) The proposed subdivision makes adequate provision for water supply, storm drainage, sewage disposal,
streets, erosion control and all other improvements required by the subdivision ordinance;
(5) The proposed subdivision will not cause significant environmental damage since the site was previously
developed;
(6) The proposed subdivision will not conflict with easements of record, but will provide all necessary
easements; and
(7) The proposed subdivision is not premature since it is served by adequate city infrastructure. A subdivision
is premature if any of the following exists:
a. Lack of adequate storm water drainage.
b. Lack of adequate roads.
C. Lack of adequate sanitary sewer systems.
d. Lack of adequate off -site public improvements or support systems.
5. In evaluating a site plan and building plan, the city shall consider the development's compliance with the
following:
1
so
M
(1) The development is consistent with the elements and objectives of the city's development guides,
including the comprehensive plan, official road mapping, and other plans that may be adopted;
(2) The development is consistent with the site plan requirements;
(3) The development preserves the site in its natural state to the extent practicable by minimizing tree and
soil removal and designing grade changes to be in keeping with the general appearance of the
neighboring developed or developing or developing areas;
(4) The development is creates a harmonious relationship of building and open space with natural site
features and with existing and future buildings having a visual relationship to the development;
(5) The development is creates a functional and harmonious design for structures and site features, with
special attention to the following:
a. An internal sense of order for the buildings and use on the site and provision of a desirable
environment for occupants, visitors and general community;
b. The amount and location of open space and landscaping;
C. Materials, textures, colors and details of construction as an expression of the design concept and
the compatibility of the same with adjacent and neighboring structures and uses; and
d. Vehicular and pedestrian circulation, including walkways, interior drives and parking in terms of
location and number of access points to the public streets, width of interior drives and access points,
general interior circulation, separation of pedestrian and vehicular traffic and arrangement and
amount of parking.
(6) The development protects adjacent and neighboring properties through reasonable provision for surface
water drainage, sound and sight buffers, preservation of views, light and air and those aspects of design
not adequately covered by other regulations which may have substantial effects on neighboring land uses.
6. The planning report #05-12 dated April 5, 2005, prepared by Robert Generous, et al, is incorporated
herein.
RECOMMENDATION
The Planning Commission recornrnends that the City Council approve the Land Use Amendment,
Preliminary Plat for Gateway East 2°d Addition and Site Plan Review for the East Water Treatment Plant.
ADOPTED by the Chanhassen Planning Commission this 5th day of April, 2005.
CHANHASSEN PLANNING COMMISSION
Its Chairman
will
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CITY OF CHANHASSEN
AFFIDAVIT OF MAILING NOTICE
STATE OF MlNNESOTA)
) ss.
COUNTY OF CARVER )
I, Karen J. Engelhardt, being first duly swom, on oath deposes that she is and was on
March 24, 2005, the duly qualified and acting Deputy Clerk of the City of Chanhassen,
Minnesota; that on said date she caused to be mailed a copy of the attached notice of Public
Hearing for Water Treatment Plant — Planning Case No. 05-12 to the persons named on
attached Exhibit "A", by enclosing a copy of said notice in an envelope addressed to such owner,
and depositing the envelopes addressed to all such owners in the United States mail with postage
fully prepaid thereon; that the names and addresses of such owners were those appearing as such
by the records of the County Treasurer, Carver County, Minnesota, and by other appropriate
records.
Subscribed and sworn to before me
this " 1hday of _1Y'VyCh 2005.
T
Notary P
KIM T. MEl1WISSEN
• q
Notary Public -Minnesota
My Commission Expires Jw 31, 2010
SCANNED
Notice of Public Hearing
Chanhassen Planning Commission Meeting
Notice of Public Hearing
Chanhassen Planning Commission Meeting
Date & Time:
Tuesday, April 5 2005 at 7:00 p.m.
Location:
City Hall Council Chambers, 7700 Market Blvd.
Request for Land Use Amendment from Parks and Open Space
Proposal:
to Commercial; Subdivision approval for two lots; and Site Plan
Review with Variances for a 12,500 sq. ft. building for a Water
Treatment Plant and an 8,100 sq. ft. Back Wash Tank.
Planning File:
05-12
Applicant:
I Cit of Chanhassen
Property
End of West 79t St, between Highway 5 and West 78th St.
Location:
A location map Is on the reverse side of this notice.
The purpose of this public hearing is to inform you about the
applicant's request and to obtain input from the neighborhood
about this project. During the meeting, the Chair will lead the
public hearing through the following steps:
What Happens
at the Meeting:
1. Staff will give an overview of the proposed project.
2. The applicant will present plans on the project.
3. Comments are received from the public.
4. Public hearing is closed and the Commission discusses
the project.
If you want to see the plans before the meeting, please stop
by City Hall during office hours, 8:00 a.m. to 4:30 p.m.,
Monday through Friday. If you wish to talk to someone about
this project, please contact Bob Generous at 952-227-1131 or
Questions &
e-mail bcenerous@ci.chanhassen.mn.us. If you choose to
Comments:
submit written comments, it is helpful to have one copy to the
department in advance of the meeting. Staff will provide
copies to the Commission. The staff report for this Item will
be available online at http://206.10.76.6/weblink the
Thursday prior to the Planning Commission meeting.
City Review Procedure:
• Subdivisions, Planned Unit Developments, Site Plan Reviews, Conditional and Interim Uses, Wetland Alterations,
Rezonings, Comprehensive Plan Amendments and Code Amendments require a public hearing before the
Planning Commission. City ordinances require all property within 500 feet of the subject site to be notified of the
application in writing. Any interested party is invited to attend the meeting.
• staff prepares a report on the subject application that includes all pertinent information and a recommendation.
These reports are available by request At the Planning Commission meeting, staff will give a verbal overview of
the report and a recommendation. The item will be opened for the public to speak about the proposal as a part of
the hearing process. The Commission will close the public hearing and discuss the item and make a
recommendation to the City Council. The City Council may reverse, all irm or modify wholly or partly the Planning
Commission's recommendation. Rezonings, land use and code amendments take a simple majority vote of the
City Council except rezonings and land use amendments from residential to commercial/Industrial.
• Minnesota State Statute 519.99 requires all applications to be processed within 60 days unless the applicant
waives this standard. Some applications due to their complexity may take several months to complete. Any
person wishing to follow an item through the process should check with the Planning Department regarding its
status and scheduling for the City Council meeting.
• A neighborhood spokesperson/reprewntative is encouraged to provide a contact for the city. Often developers
are encouraged to meet with the neighborhood regarding their proposal. Staff is also available to review the
project with any interested person(s).
• Because the Planning Commission holds the public hearing, the City Council does not. Minutes are taken and
any correspondence regarding the application will be Included in the report to the City Council. If you wish to have
something to be included in the report, please contact the Planning Staff person named on the notification.
Date & Time:
Tuesday, April 5, 2005 at 7:00 p.m.
Location:
City Hall Council Chambers, 7700 Market Blvd.
Request for Land Use Amendment from Parks and Open Space
to Commercial; Subdivision approval for two lots; and Site Plan
Proposal:
Review with Variances for a 12,500 sq. ft. building for a Water
Treatment Plant and an 8,100 sq. ft. Back Wash Tank.
Plannin File:
05-12
Applicant:
I Cit of Chanhassen
Property
End of West 79t St. between Highway 5 and West 78t St.
Location:
A location map Is on the reverse side of this notice.
The purpose of this public hearing is to inform you about the
applicant's request and to obtain input from the neighborh
about this project. During the meeting, the Chair will lead
public hearing through the following steps: 19
What Happens
at the Meeting:
1. Staff will give an overview of the proposed project.
2. The applicant will present plans on the project,
3. Comments are received from the public.
4. Public hearing is closed and the Commission discusses
the project.
If you want to see the plans before the meeting, please stop
by City Hall during office hours, 8:00 a.m. to 4:30 p.m.,
Monday through Friday. If you wish to talk to someone about
this project, please contact Bob Generous at 952-227-1131 or
Questions & e-mail bcenerous@ci.chanhassen.mn.us. If you choose to
Comments: submit written comments, it is helpful to have one copy to the
department in advance of the meeting. Staff will provide
copies to the Commission. The staff report for this item will
be available online at http://206.10.76.6/weblink the
Thursday prior to the Planning Commission meeting.
City Review Procedure:
• Subdivisions, Planned Unit Developments, site Plan Reviews, Conditional and Interim Uses. Welland Alters
Rezonings, Comprehensive Plan Amendments and Code Amendments require a public hearing before the
Planning Commission. City ordinances require all property within 500 feet of the subject site to be notified of the
application in writing. Any interested party is invited to attend the meeting.
• Staff prepares a report on the subject application that includes all pertinent information and a recommendation.
These reports are available by request. At the Planning Commission meeting, staff will give a verbal overview of
the report and a recommentlation. The item will be opened for the public to speak about the proposal as a part of
the hearing process. The Commission will close the public hearing and discuss the item and make a
recommendation to the City Council, The City Council may reverse, affirm or modify wholly or partly the Planning
Commission's recommendation. Rezonings, land use and code amendments take a simple majority vote of the
City Council except rezonings and land use amendments from residential to commemiallindustrial.
• Minnesota State Statute 519.99 requires all applications to be processed within 60 days unless the applicant
waives this standard. Some applications due to their complexity may take several months to complete. Any
person wishing to follow an item through the process should check with the Planning Department regarding its
status and scheduling for the City Council meeting.
• A neighborhood spokespersontrepresentative is encouraged to provide a contact for the city. Often developers
are encouraged to meet with the neighborhood regarding their proposal. Staff Is also available to review the
project with any interested person(s).
• Because the Planning Commission holds the public hearing, the City Council does not. Minutes are taken and
any correspondence regarding the application will be included in the report to the City Council, If you wish to have
something to be included in the report, please contact the Plannino Staff person named on the notification.
N
Subject
Site
This map is neither a legally recorded map nor a survey and is not intended to be used as one.
This map is a compilation of records, infomation and data located in various city, county, state and
fed" offices and other sources regarding the area shown, and is to be used for reference
primness only. The C ty does not warrant that the Geographic Information System (GIS) Data used
to prepare this ,rep are shot, free, and the City does not represent that the GIS Data can be used
for navigational, bedding or any other purpose requiring exacting measumment of distance or
direction or precision in the depiction of geographic features. H errors or discrepancies are found
Waste, rant= 952-227-1107. The preceding disclaimer la provided pursuant to Minnesota
Statutes §466 03, Subd. 21 (2000), and the user of this map acknowledges that the City shall not
be liable for any damages, and evressly waives all darts, and agrees to defend, indemnify, antl
hold hamiess the City from any and all darts brought by Use, its employees or agents, or third
parties which arse out ot the users access or use of data provided.
Subject
Site
W
This rtap is neither a legally recorded map nor a survey aM is not imendad to be used as one.
This ,rep is a cominlation of records, intonrabon and data located ni various city, county, state and
federal offices and other sources regarding die area shown, and is to be usetl for referenda
purposes only. The City does not w nrant that the Geographic Information System (GIS) Data used
to prepare this prep are error free, and the City does not represent that the GIS Data can be used
for navigational, tracking or any other purpose requiring eaacling measurement of distance or
direction or precision in the depiction of geographic features. H erotre or d whipandes are found
please contact 952-227-1107. The preceding disclaimer is provided pursuant to Minnesota
Statutes §466.03, Subd. 21 (2000), and the user a this map acknowledges that the City shall not
be liable for any damages, and expressly waives all dams, and agrees to defend, indemnify, and
hold harmless the City tram tiny and all dams brought by User, its employees or agents, or third
parties wtrid'i arise out ot"tastes access or use of data provided.
,,NAME1,,
a N AM E2,,
«ADD1
«ADD2»
«CITY» „STATE» "ZIP,,
,,Next Record—,NAME1,,
,iN AM E2,,
„ADD1 11
«ADD2»
«CITY,, ,STATE,, ,ZIP,,
so
Public Hearing Notification Area (500 feet)
Water Treatment Plant
Planning Case No. 05-12
�ate�a�
State Hwy
5 Ptbatet�m
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ACTION WEST INC
AMOCO AMERICAN OIL CO
DBA RE/MAX ACTION WEST
AMERICAN LEGION-CHAN POST 580
C/O BP AMERICA INC-TAX DEPT
7811 GREAT PLAINS BLVD
7995 GREAT PLAINS BLVD
PO BOX 1548
CHANHASSEN MN 55317
CHANHASSEN MN 55317
WARRENVILLE IL 60555
WAYNE RUDOLPH ANDERSON &
JOHN W & PAULA J ATKINS
BAM PROPERTY HOLDINGS LLC
JOAN SOPHIA W ILLMAN-ANDERSON
204 CHAN VIEW
220 78TH ST W
440 79TH ST W
CHANHASSEN MN 55317
CHANHASSEN MN 55317
CHANHASSEN MN 55317
BLOOMBERG COMPANIES INC VERDELL BORTH
PO BOX 730 202 78TH ST W
CHANHASSEN MN 55317 CHANHASSEN MN 55317
CENTERPOINT ENERGY MINNEGASCO
ATTN: PROPERTY ACCOUNTING CHAPEL HILL ACADEMY
800 LASALLE AVE-FLOOR 11 306 78TH ST W
PO BOX 59038 CHANHASSEN MN 55317
MINNEAPOLIS MN 55459
DANIEL A & KRIS L CITARELLA JAMES & KELLEY A DEGROSS
8008 ERIE AVE 3911 MEADOWVIEW LN
CHANHASSEN MN 55317 ELKO MN 55020
BROWN PROPERTIES LLC
C/O GARY L BROWN
1831 KOEHNEN CIR W
EXCELSIOR MN 55331
CHURCH OF ST HUBERT
8201 MAIN ST
CHANHASSEN MN 55317
DISCOVERY UNITED METH CHURCH
950 TRUMBLE ST
CHASKA MN 55318
DORN BUILDERS INC
DRF CHANHASSEN MEDICAL BLDG
PAUL G EIDEM &
C/O MARATHON MANAGEMENT INC
C/O FRAUENSHUH COMPANIES
ANDREA F GRIFFITH
834 3RD AVE S
7101 78TH ST W
7727 FRONTIER TRL
SUITE A
SUITE #100
CHANHASSEN MN 55317
EXCELSIOR MN 55331
MINNEAPOLIS MN 55439
G L B PROPERTIES LLC
RYAN M GAGSTETTER
GRACE DEVELOPMENT LLC
1831 KOEHNEN CIR
224 78TH ST W
C/O COMPANY
EXCELSIOR MN 55331
CHANHASSEN MN 55317
R
250 LAAKEKE DDR E
CHANHASSEN MN 55317
CONSTANCEIHATTON
8018 ERIE AVE
CHANHASSEN MN 55317
TROY P KIMPTON
205 CHAN VIEW
CHANHASSEN MN 55317
HOLIDAY STATION STORES INC
ATTN:TAX DEPT #199
PO BOX 1224
MINNEAPOLIS MN 55440
JAY L & PEGGY M KRONICK
8575 TELLERS RD
CHASKA MN 55318
MARY E JANSEN ETAL
7720 ERIE AVE
CHANHASSEN MN 55317
CRAIG M LARSON
200 CHAN VIEW
CHANHASSEN MN 55317
MCDONALD'S CORP (22-157) STEVEN R NELSON BRIAN D & ANNA J NETZ
PO BOX 66207 11923 BLUEGILL DR 8004 ERIE AVE
CHICAGO IL 60666 SAUK CENTRE MN 56378 CHANHASSEN MN 55317
a
40
BRIAN P & COLLEEN S NUSTAD
PO BOX 8
CHANHASSEN MN 55317
NICHOLAS & PATRICIA PEKAREK
202 CHAN VIEW
CHANHASSEN MN 55317
BARBARA PIKE
201 CHAN VIEW
CHANHASSEN MN
RICHARD A & ELIZABETH M NUSTAD
7721 ERIE AVE
CHANHASSEN MN 55317
TODD W PERTTU
203 1/2 CHAN VIEW
CHANHASSEN MN 55317
FREDERICK C RIESE &
VALAIRE P RIESE
55317 9154 SUNNYVALE DR
CHANHASSEN MN 55317
DONALD T SMITH
8012 ERIE AVE
CHANHASSEN MN 55317
DONALD R STROTH
206 78TH ST W
CHANHASSEN MN 55317
VALVOLINE INSTANT OIL CHANGE
C/O ASHLAND INC
PO BOX 14000
LEXINGTON KY 40512
MICHAEL J SORENSEN
12625 58TH ST
MAYER MN 55360
CHRISTINE A TAILLON
TRUSTEE OF TRUST
203 CHAN VIEW
CHANHASSEN MN 55317
THOMAS J & JENNIFER WILDER
21740 LILAC LN
EXCELSIOR MN 55331
GREGORY J & KAREN J ODASH
221 CHAN VIEW
CHANHASSEN MN 55317
JENNYJO PETERSEN
8016 ERIE AVE
CHANHASSEN MN 55317
SINCLAIR MARKETING INC
SINCLAIR OIL CORP-PROP TAX DIV
PO BOX 30825
SALT LAKE CITY UT 84130
TONJA ST MARTIN
207 CHAN VIEW
CHANHASSEN MN 55317
TERRANCE SR & SANDRA
THOMPSON
3820 LINDEN CIR
EXCELSIOR MN 55331
,�ES°r •
°A•
,& Minnesota Department of Transportation
q OF Metropolitan Division
Waters Edge
1500 West County Road B2
Roseville, MN 55113
April 8, 2005
Bob Generous ,Senior Planner
City of Chanhassen
7700 Market Boulevard
P.O. Box 147
Chanhassen, MN 55317
SUBJECT: Water Treatment Plant for City of Chanhassen
N•a►E trTYU
APR 1 1 2005
CITY Of CHANHASSEN
Mn/DOT Review P05-032
North of TH 5, south of the Twin Cities & Western RR Tracks, East of
Market Boulevard (not too far west of TH 5 — TH 101 Intersection)
Chanhassen, Carver County
Control Section 1002
Dear Mr. Generous:
The Minnesota Department of Transportation (Mn/DOT) has reviewed the above
referenced plat in compliance with Minnesota Statute 505.03, subdivision 2, Plats. Before
any further development, please address the following issues:
Access Control.
Since Lot 2 will have frontage on both TH 5 and TH 101, yet will also have access to the
proposed extension of West 79 ° Street, Mn/DOT would like to have Access Control
along Trunk Highway 5 and Trunk Highway 101 frontage dedicated to Mn/DOT at this
time of platting. Please direct questions regarding this issue to Lynn Clarkowski (651-
634-2103), Mn/DOT's Area Engineer for Carver County.
Drainage. -
With the addition of impervious surfaces to this site, a drainage permit will be
required and all Mn/DOT requirements will apply. No additional runoff to Mn/DOT
R/W will be allowed and all drainage patterns must be maintained. Please provide
the following:
1) A grading Plan of the existing & proposed project, showing topography.
2) Drainage area maps for the proposed project showing both existing and proposed
drainage areas and flows (with flow arrows).
3) Storm sewer plans and pond plans.
4) Hydraulic computations/modeling before and after proposed reconstructions (ie.,
Hydro-CADinput assumptions, calibration data, results for 10 and 100 year storm
events).
Please submit any further documentation electronically as Adobe Acrobat (.pdf), and
HydroCAD (.hc) files. If plans change, you must resubmit for review. The
electronic model and pdf file can be emailed to richard.cadvna.dot.state.mn.us. Please
direct questions concerning these issues to Richard Cady (651-634-2075) of
Mn/DOT's Water Resources Engineering section.
An equal opportunity employer
Permits:
■ Any use of or work within or affecting Mn/DOT right of way requires a permit. A
utility permit ( form 2525) and a drainage permit will be needed. Permit forms are
available from Mn/DOT's utility website at www.dot.state.nm.us/tecsup/utility .
Please direct any questions regarding permit requirements to Keith Van Wagner
(651-582-1443), or Buck Craig (651-582-1447) of Mn/DOT's Metro Permits Section.
Right of Way.
• The Right -of -Way (R/W) Section has reviewed the plans. The "Existing Mn/DOT
R/W" needs to be clearly labeled. In addition, a good site location map is requested
to be included as part of the first sheet.Please direct any questions regarding permit
requirements to John Isackson of Mn/DOT's Right-of-way Section at 651-582-1273.
Electronic Document Request. -
Asa final request, could you please send an electronic .pdf file copy of your plan
submittal for our record keeping purposes to ivanita.voi",dot.state.mn.us Please
refer to Mn/DOT Review #PO5-032 / Water Treatment Plant / CHN when
emailing the .pdf file. Thank you for your consideration in this matter.
As a reminder, please address all initial future correspondence for development activity
such as plats and site plans to:
Development Reviews Coordinator
Mn/DOT - Metro Division
Waters Edge
1500 West County Road B-2
Roseville, Minnesota 55113
Mn/DOT document submittal guidelines require three (3) complete copies of plats and
two (2) copies of other review documents including site plans. Failure to provide three
(3) copies of a plat and/or two (2) copies of other review documents will make a
submittal incomplete and delay Mn/DOT's review and response to development
proposals. We appreciate your anticipated cooperation in providing the necessary
number of copies, as this will prevent us from having to delay and/or return incomplete
submittals.
If you have any questions concerning this review please feel free to contact me at (651)
634-2083.
S' erely, -
Juanita Voigt
Transportation Planner
Copy: Roger Gustafson / Carver County Engineer
SEH Consulting Engineers
Metro LGL files — Chanhassen
Metro Division File —CS 1002
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CITY OF CHANHASSEN
STAFF REPORT
PC DA&: April 5, 2005 4]
CC DATE: April 25, 2005
REVIEW DEADLINE: May 3, 2005
CASE #: Planning Case #05-12
BY: RG, LH, ML, MS, JS, ST
PROPOSAL: Request for Land Use Amendment from Parks and Open Space to Commercial;
Subdivision approval for two lots, one outlot and right-of-way for West 791h Street; and
Site Plan Review for a 12,500 square -foot building for a water treatment plant and an
8,100 square -foot back wash tank.
LOCATION: End of West 79`' Street between Highway 5 and the Twin Cities and Western Railroad
right-of-way.
APPLICANT: City of Chanhassen
7700 Market Boulevard
P. O. Box 147
Chanhassen, MN 55317
(952) 227-1100
PRESENT ZONING: Highway and Business Services District, BH
2020 LAND USE PLAN: Parks and Open Space
ACREAGE: 3.94 DENSITY: F.A.R.0.18
SUMMARY OF REQUEST: The City is requesting subdivision approval to create two lots and one
outlot at the end of West 79`s Street. On one lot, a water treatment facility is being proposed. The
second lot can either be sold or used by the City at a later date. The land use amendment would bring
the existing zoning and proposed and potential future uses of the property into compliance with one
another. The site plan approval is for the construction of the east water treatment plant with a variance
from the setback to West 79s' Street.
LEVEL OF CITY DISCRETION IN DECISION -MAKING:
The City's discretion in approving or denying a preliminary plat is limited to whether or not the
proposed plat meets the standards outlined in the Subdivision Regulations and Zoning Ordinance. If it
meets these standards, the City must approve the preliminary plat. This is a quasi-judicial decision.
The City has a relatively high level of discretion in approving amendments because the City is acting in
its legislative or policy making capacity. An amendment must be consistent with the City's
Comprehensive Plan.
The City's discretion in approving or denying a site plan is limited to whether or not the proposed
project complies with Zoning Ordinance requirements. If it meets these standards, the City must then
approve the site plan. This is a quasi-judicial decision.
Planning Commission
Planning Case No. 05-12
April 5, 2005
Page 2
PROPOSALISU1bIMARY
The development proposal includes the subdivision of the three parcels constituting the property
creating two lots and an outlot with an easement for the extension of West 790' Street. Outlot A
contains a parking area. Lot 1 is proposed for the East Water Treatment Plant. Lot 2 may be sold
as a commercial property or used by the City at a later date. The property is zoned Highway and
Business Services District, but is guided parks and open space in the City's comprehensive plan.
In order to clarify the use of the site and make the land use consistent with the zoning of the
property, the land is being re -guided to commercial use.
The City is proposing a 12,500 square foot, one-story, 24-foot high water treatment facility with
an 8,100 square -foot back wash tank. The building meets the setback from Highway 5 and West
790' Street. Building materials consist of a light brown brick, limestone colored block, beige
concrete sill accent and glass block windows. The building elevations are highly articulated with
many horizontal and vertical recesses and projections in the building fagade. The roof consists of
standing seam metal over the eastern end of the building, a flat roof in the central portions of the
building, and a barrel metal roof over the loading dock area. A security system will be installed as
part of the building construction. The extent of the security system is still being evaluated.
The site is located on the eastern entrance to the City's downtown. The property becomes narrower
from west to east going from a width at its widest of approximately 195 feet down to a width of 100
feet. North of the site is the Twin City and Western Railroad and West 78'" Street and the end of
West 79"' Street. Highway 101 abuts the property to the east and Highway 5 abuts the property to
the south. The old Hanus building is located west of the site. The Highway 5 pedestrian bridge
intersects the western portion of the property, east of the proposed Water Treatment Plant building.
The high point of the site is at the pedestrian bridge at an elevation of 978 and then slopes to the
east, west and south. The low point on the property is in the southeast comer of the site at an
elevation of 940. Trees are scattered on the property with no significant natural stands. A large
grouping of pines is located in the southwest comer of the site, which are proposed to be preserved.
The proposed development complies with the City's zoning and subdivision ordinance with the
variance for the setback to West 79`s Street. Staff is recommending approval of the proposed
development.
BACKGROUND
The site was previously owned by Apple Valley Red-E-Mix. In 1992, the City initiated the
condemnation of the former Apple Valley Red-E-Mix parcel. In October 1993, Apple Valley Red-
E-Mix vacated the property. In June 1995, the City finalized the purchase of the site.
On April 4, 1983, the City approved a non -conforming use permit, a conditional use permit (#82-
4) and a variance to permit a washout system at the Apple Valley Red-E-Mix site.
The eastern end of the site was previously owned and used for a Taco Shop. In October 1991, the
City initiated the condemnation of the Taco Shop parcel in conjunction with the realignment of the
Planning Commission
Planning Case No. 05-12
April 5, 2005
Page 3
intersection of Highway 101 and West 78m Street. On May 21, 1993, the City finalized the
acquisition of the parcel.
The pedestrian bridge was constructed over Highway 5 in 1995.
APPLICABLE REGULATIONS
Chapter 18, Subdivisions
Chapter 20, Article II, Division 6, Site Plan Review
Chapter 20, Article XVII, `BH" Highway and Business Services District
Chapter 20, Article XXIII, Division 7, Design Standards for Commercial, Industrial and Office -
Institutional Developments
COMPREHENSIVE PLAN AMENDMENT
The property is currently zoned Commercial, BH, but is guided for parks and open space. At one
time, it was thought that this area would be used as a park -like, open space gateway to the City of
Chanhassen. However, the site will serve the City as a water treatment facility site with an
additional lot that could be sold for development or used by the City. Utility services are a
permitted use in the BH district. The land use amendment will bring the comprehensive plan and
potential use of the site into compliance with each other.
GENERAL SITE PLAN/ARCHITECTURE
ARCHITECTURAL COMPLIANCE
Size Portion Placement
The building entrance is located off West 79`s Street. The building entrance is articulated with
glass and accessed via a raised plaza.
Material and Detail
Building materials consist of high -quality materials including a light brown brick, limestone
colored block, beige concrete sill accent and glass block windows. The building elevations are
highly articulated with many horizontal and vertical recesses and projections in the building fagade.
Height and Roof Design
Building height is one story at 24 feet. Pitched roof elements include both a sloped roof of metal
standing seam and a metal barrel roof. Height is limited to two stories in the BH zoning district.
Planning Commission
Planning Case No. 05-12
April 5, 2005
Page 4
Facade Transparency
50 percent of the first floor elevation that is viewed by the public includes transparent windows
and or doors. All other areas shall include landscaping material and architectural detailing and
articulation.
Site Furnishing
Community features include landscaping, lighting, and access to the pedestrian bridge. The
building has a raised plaza at its entrance.
Loading Areas, Refuse Area, etc.
Screening of service yards, and truck parking/loading areas cannot be accommodated due to the
constraints of the site and the function of the building. Access to the site is limited to West 7SP
Street.
Landscaping and Tree Preservation
The landscape plan for the water treatment plant has been developed to reflect the natural
materials used in the building. Native trees, shrubs, and grasses as well as non-native perennials
and shrubs have been utilized to create a naturalized planting plan. The guiding factors for
selection and placement were attractiveness and low -maintenance.
Bufferyard requirements:
Required
Proposed
Highway 5
3 canopy trees
3 canopy
bufferyard B — 250'
5 understory trees
23 understory
5 shrubs
0 shrubs
North property line
3 canopy trees
7 canopy
bufferyard B — 250'
5 understory trees
6 understory
5 shrubs
40+ shrubs
East property line.
0 canopy tree
0 canopy trees
bufferyard A —150'
2 understory trees
7 understory
2 shrubs
0 shrubs
West property line
2 canopy trees
1 canopy
bufferyard A —175'
2 understory trees
10 understory
4 shrubs
1 40+ shrubs
Where bufferyard requirements have not been met, existing vegetation, elevation change and/or
distance makes up for the minimum requirements.
Existing trees on the site include spruce, Austrian pine, and maple. Some of the maples may be
able to be transplanted to another site. Staff will inspect the trees and mark ones that can be
Planning Commission
Planning Case No. 05-12
April 5, 2005
Page 5
moved. Once the ground has thawed, staff will coordinate the move. The Austrian pines along
Highway 5 provide an excellent buffer for the plant and neighboring building and cell tower
base. Staff recommends that as many as possible of these trees be saved. Trees lost due to
construction will be replaced.
There is a large expanse of grass over the underground tanks. The current proposal includes sod
to be installed. Staff would like to explore the possibility of installing a planting of native
grasses or other ground cover that would alleviate the need for mowing. City staff and the
consultant will determine whether of not a shorter prairie grass or low ground cover would be
suitable in this area.
Currently, there is a naturalized area along the slope leading down to Highway 5. Staff is
recommending that this feature remain in order to eliminate maintenance requirements in this
steep area.
Staff recommends that, where feasible, sod be replaced by grass seed. Exceptions would include
along the curb line, trails and adjacent to the building.
Lot Frontage and Parking location
The property fronts on both Highway 5 and West 79`s Street. Site access and parking are
provided off West 79s' street. Parking is provided off West 79m Street.
COMPLIANCE TABLE (Water Treatment Plant)
Front
setback
Side Setback
Rear Setback
Building
Height
Site
Coverage
Code
25'
10,
20'
2-story
65 %
Proposed
33'
13'
NA
1-story46
%
GRADING, DRAINAGE & EROSION CONTROL
The existing site ranges from a high elevation of 978 in the west central portion of the site down
to a low point of 940 in the southeast corner. The plans propose to grade about 60% of the site
for a water treatment plant, a proposed street with a cul-de-sac, and a stormwater pond. While
the finished floor elevation of the treatment plan is set at 969.0, the site cannot be graded down
to this elevation because of the existing pedestrian bridge. The applicant has done a nice job of
working with this constraint and matching into the existing 978 elevation along the east side of
the building. Because of the need to hold the 978 ground elevation near the pedestrian bridge, a
retaining wall (6' —10) will be required along the north side of the backwash tanks adjacent to
the south side of the street and trail. This retaining wall will require a building permit from the
City's Building Department.
9
Planning Commission
Planning Case No. 05-12
April 5, 2005
Page 6
The existing site drainage is encompassed within two different drainage areas. Under existing
conditions, the westernmost portion of the site drains off site to the west while the remainder of
the site drains to an existing storm sewer culvert in the southeast comer of the site. Under
developed conditions, the applicant is proposing to capture the eastern half of the street drainage,
all of the Lot 2 drainage and a large majority of the Lot 1 drainage. This stormwater will be
conveyed via storm sewer and overland flow to the proposed pond in the southeasterly corner of
the site for treatment. The remaining impervious surface from the street and treatment plant will
drain to ane existing storm sewer in West 790' Street, which flows to an existing pond in the
downtown area. The proposed pond must be designed to National Urban Runoff Program
(NURP) standards with maximum 3:1 side slopes and a 10:1 safety bench at the NWL. An outlet
control structure, per City Detail Plate No. 3109, must be installed at the outlet of the pond.
Drainage calculations for the site have been submitted and only minor changes remain. The
applicant is required to meet the existing site runoff rates for the 10-year and 100-year, 24-hour
storm events. Storm sewer sizing calculations must be submitted prior to final plat application.
The storm sewer must be sized for a 10-year, 24-hour storm event. Drainage and utility
easements must 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.
Proposed erosion control must be developed in accordance with the City's Best Management
Practice Handbook (BMPH). Staff recommends that Type I silt fence be used along the entire
south and west construction limits. A rock construction entrance, per City Detail Plate No. 5301,
must be added to the plans off of existing West 79`s Street. In addition, tree preservation fencing
must be installed at the limits of tree removal. All disturbed areas, as a result of construction,
must be seeded and mulched or sodded immediately after grading to minimize erosion. Any off -
site grading will require an easement from the appropriate property owner.
Wetlands
No jurisdictional wetlands exist on -site.
Storm Water Management
The City's Surface Water Management Plan shows a regional storm water facility on this
property (RM-P5.2). The Riley -Purgatory -Bluff Creek Watershed District is currently designing
stormwater-related improvements within the Rice Marsh Lake subwatershed. Preliminary
discussions with the watershed district have suggested construction of a small regional
stormwater pond on this site. The applicant should work with the watershed district to provide
regional water quality infrastructure on this site.
The flow path and velocity of the water from the flared end sections to the storm water should be
evaluated. Erosion of the area is a concern as the water flows over the site into the pond.
A Storm Water Pollution Prevention Plan (SWPPP) encompassing an erosion and sediment
control plan should be developed for the site. The SWPPP is needed prior to applying for the
NPDES permit.
Planning Commission
Planning Case No. 05-12
April 5, 2005
Page 7
Erosion Control
Temporary and permanent erosion control plans and details should be developed. Temporary
erosion control could consist of Type 1 mulch and temporary seed mixes. Erosion control
blanket should be applied to the storm water pond and any disturbed areas between the flared end
sections and the pond. Energy dissipation is needed at the flared end sections. 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
Time
Steeper than 3:1
7 days
10:1 to 3:1
14 days
Flatter than 10:1
21 days
(Maximum time an area can
remain open when the area
is not actively being worked.)
These areas include constructed stormwater management pond side slopes, and any exposed soil
areas with a positive slope to a stormwater 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.
Sediment Control
Street cleaning of soil tracked onto public streets shall include daily street scraping and street
sweeping as needed. Inlet protection should be provided following installation. Wimco-type
inlet controls are recommended. A rock construction entrance is needed from the site to West
79th Street. Chanhassen Type 1 silt fence should be installed around the south and east sides of
the site.
Other Agencies
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,
Minnesota Department of Natural Resources (for dewatering)) and comply with their conditions
of approval.
Municipal sanitary sewer is available to the site from the south. There is an existing sanitary
sewer main along the southern property line which the applicant is proposing to connect a
service line to. This connection will require the installation of a manhole on the existing sewer
main. As for water, the treatment plant itself will have multiple water lines coming to/from the
building. These watermains include typical distribution mains, raw watermains to carry water
directly from the wells to the treatment plant, a reclaim watermain which will carry a portion of
the filter backwash water back to the plant for treatment, and spraywash mains which give the
Utility Department staff the ability to clean out the backwash tanks. The actual potable water
n
Planning Commission
Planning Case No. 05-12
April5, 2005
Page 8
service to the plant will come from the south side of the building off a relocated watermain. All
of the utility improvements are required to be constructed in accordance with the City of
Chanhassen's latest edition of Standard Specifications and Detail Plates. Detailed construction
plans, including plan and profile drawings of the proposed utilities, are required to be submitted
at the time of final plat.
STREETS
The plans propose on extending West 79`s Street approximately 250 feet east of its current
terminus to serve the two proposed lots. Because this street will be extended within public or
City -owned property, additional public right-of-way is not necessary. An access easement for
the benefit of Lot 2 shall be recorded across Lot 1. The existing pavement width of West 791°
Street is 27 feet from back -of -curb to back -of -curb. The standard pavement width for public
streets in commercial/business districts in Chanhassen is 36 feet from back -of -curb to back -of -
curb with a 48-foot cul-de-sac radius. In this case, staff is fine with the street width staying at 27
feet in order to stay consistent with the existing street width to the west. The cul-de-sac
pavement radius is proposed at 60-feet. This radius exceeds the current standard and will
provide greater area for semi -trucks to turnaround.
With the expected increase in traffic on West 79"' Street from deliveries to the treatment plant
and the future development of Lot 2, staff is recommending that additional signage be installed
near the existing Hanus Building just west of the site. The signage is needed because of the
existing blind approach to motorists leaving Brown's Auto and conversely to motorists heading
west from the new treatment plant.
COMPLIANCE TABLE
AREA (sq. ft.)
Frontage (ft)
Depth (ft.)
Setbacks: Front,
Side, Rear (ft.)
Code
20,000
100
150
25, 10, 20
Lot 1
108,404
565
195
25, 10, NA
(double front)
Lot 2
60,537
151
302
25, 10 NA
(double front)
Outlot A
12,890
Total
1171,831
RECOMMENDATION
Staff recommends that the Planning Commission adopt the following three motions:
A. "The Chanhassen Planning Commission recommends approval of the Land Use Amendment
from Parks and Open Space to Commercial."
Planning Commission
Planning Case No. 05-12
April 5, 2005
Page 9
B. "The Chanhassen Planning Commission recommends approval of the preliminaryplat for
Gateway East 2"d Addition creating two lots, one outlot and right-of-way for West 79 Street, plans
prepared by Hanson Thorp Pellinen Olson, Inc., dated February 9, 2005, revised February 26, 2005,
based on the findings of fact attached to this report and subject to the following conditions:
The applicant is required to meet the existing site runoff rates for the 10-year and 100-year,
24-hour storm events. The proposed pond must be designed to National Urban Runoff
Program (NURP) standards.
2. The storm sewer must be designed for a 10-year, 24-hour storm event. Submit stone sewer
sizing calculations and drainage map prior to final plat for staff review and approval.
3. Drainage and utility easements must be dedicated on the final plat over the public stone
drainage system including ponds, drainage swales, and wetlands up to the 100-year flood
level. The minimum easement width must be 20 feet wide.
4. An access easement for the benefit of Lot 2 shall be recorded across Lot I.
5. Submit a separate site plan, grading/drainage/erosion control plan, and utility plan.
6. Pedestrian ramps per City Detail Plate No. 5215 are required at the street crossing of the
proposed trail.
7. On the grading plan:
a. Show all existing and proposed easements.
In. Show the benchmark used for the site survey.
c. Show all proposed contour lines in bold.
d. Show the emergency overflow elevation from the proposed pond.
e. Show all proposed contours on the north side of the proposed trail and on Lot 2.
f. Do not show the proposed sanitary/water lines on the grading plan.
g. Show the proposed storm sewer to/from the pond.
8. On the site plan, show the dimensions for street width, cul-de-sac radius, parking stalls, trail,
etc.
9. On the utility plan:
a. Show all existing and proposed utilities.
In. Show the proposed rim and invert elevations for all sanitary and storm sewer.
10. The proposed retaining wall along the north side of the backwash tanks will require a
building permit from the City's Building Department.
11. Proposed erosion control must be developed in accordance with the City's Best Management
Practice Handbook (BMPH). Staff recommends that Type I silt fence be used along the
entire south and west construction limits. A rock construction entrance, per City Detail Plate
No. 5301, must be added to the plans off of existing West 79`s Street. In addition, tree
40
Planning Commission
Planning Case No. 05-12
April 5, 2005
Page 10
preservation fencing must be installed at the limits of tree removal. All disturbed areas, as a
result of construction, must be seeded and mulched or sodded immediately after grading to
minimize erosion. Any off -site grading will require an easement from the appropriate
property owner.
12. All of the utility improvements are required to be constructed in accordance with the City of
Chanhassen's latest edition of Standard Specifications and Detail Plates. Detailed
construction plans, including plan and profile drawings of the proposed utilities, are required
to be submitted at the time of final plat.
13. Additional signage shall be installed alerting motorists to the blind approach near the existing
Hanus Building just west of the site.
14. The applicant shall work with the watershed district to provide regional water quality
infrastructure on this site.
15. The flow path and velocity of the water from the flared end sections to the storm water shall
be evaluated.
16. A Storm Water Pollution Prevention Plan (SWPPP) encompassing an erosion and sediment
control plan shall be developed for the site.
17. Temporary and permanent erosion control plans and details shall be developed.
18. Erosion control blanket shall be applied to the storm water pond and any disturbed areas
between the flared end sections and the pond, as well as on any slopes greater than or equal
to 3:1.
19. Energy dissipation shall be provided at the flared end sections.
20. 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
Time (Maximum time an area can
Steeper than 3:1
7 days remain open when the area
10:1 to 3:1
14 days is not actively being worked.)
Flatter than 10:1
21 days
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.
21. Street cleaning of soil tracked onto public streets shall include daily street scraping and street
sweeping as -needed.
Planning Commission
Planning Case No. 05-12
April 5, 2005
Page 11
22. Inlet protection shall be provided following installation. Wimco-type inlet controls are
recommended.
23. A rock construction entrance shall be provided from the site to West 79d' Street.
24. Chanhassen Type I silt fence shall be installed around the south and east sides of the site.
25. 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,
Minnesota Department of Natural Resources (for dewatering), Minnesota Department of
Health, Minnesota Department of Transportation) and comply with their conditions of
approval."
C. "The Chanhassen Planning Commission recommends approval of the Site Plan Review for a
12,500 square -foot building for a water treatment plant and an 8,100 square -foot back wash tank on
Lot 1, Block 1, Gateway East 2°d Addition, based on the findings of fact attached to this report and
subject to the following conditions:
Tree protection fencing will be required at the edge of grading limits in the southwest comer
of the property prior to any grading.
2. Staff will coordinate the transplanting of any existing maples prior to construction.
3. City staff and the water treatment plant consultants will research and determine if alternative
ground covers can be used over the underground tanks.
4. Where appropriate, seeding will replace sod with the exception of along the curb line, trails
and adjacent to the building.
5. The building must be protected with an automatic fire sprinkler system.
6. The building plans must be prepared and signed by design professionals licensed in the State of
Minnesota.
7. One accessible parking space with an access aisle must be provided.
8. The west wall of the building must be of one -hour fire -resistive construction as it is located less
than 30 feet from the property line. Openings in this wall must be in accordance with the
building code.
9. The building owner and or their representatives shall meet with the Inspections Division to
discuss plan review and permit procedures.
10. A site survey must be submitted in conjunction with the building permit application."
Planning Commission
Planning Case No. 05-12
April 5, 2005
Page 12
ATTACHMENTS:
1. Findings of Fact.
2. Reduced Copy Preliminary Plat.
3. Reduced Copy Site Plan Utility Plan (Sheet C 1).
4. Reduced Copy Site Plan Utility Plan (Sheet C2).
5. Reduced Copy Site Plan Utility Plan (Sheet C3).
6. Reduced Copy Exterior Elevations (North and West).
7. Reduced Copy Exterior Elevations (South and East).
8. Affidavit of Mailing of Public Hearing Notice.
gAp1an12005 planning cases\05-12 water treatment plattAstaff report wtp.doc