HomeMy WebLinkAbout2000 09-14 PCP PLANNING COMMISSION AGENDA
CITY OF BROOKLYN CENTER
SEPTEMBER 14, 2000
REGULAR SESSION
1. Call to Order: 7:30 p.m.
2. Roll Call
- 3. Approval of Minutes - August 10, 2000
4. Chairperson's Explanation
The Planning Commission is an advisory body. One of the Commission's functions is
to hold ublic hearings. In the matters concerned in these hearings, the Commission
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makes recommendations to the City Council. The City Council makes all final
decisions in these matters.
• 5. Ryan Companies US, Inc. 2000 -021
Request for Site and Building Plan approval for a 110,700 sq. ft. industrial building at
the northwest corner of Azelia and Lakebreeze Avenues North (4830 Azelia Avenue
North).
6. Other Business
7. Adjournment
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-s
Application Filed on 8 -17 -00
• City Council Action Should Be
Taken By 10 -16 -00 (60 Days)
Planning Commission Information Sheet
Application No. 2000 -021
Applicant: Ryan Companies US, Inc.
Location: Northeast Corner of Azelia and Lakebreeze Avenues North
(4830 Azelia Avenue North)
Request: Site and Building Plan Approval
The applicant, Ryan Companies US, Inc., on behalf of Twin Lakes II, LLC (Paul Hyde) is
seeking site and building plan approval for the second phase of the redevelopment of the old
Joslyn Pole Yard site and surrounding property to the south. The property in question is zoned
I -2 (General Industry) and is the proposed Lot 1, Block 1., Joslyn 2nd Addition, which received
preliminary plat approval by the City Council on August 14, 2000, under Planning Commission
Application No. 2000 -018. This property is bounded on the north by the Soo Line Railroad; on
the east by the ro osed Lot 2, Block 1, Joslyn 2nd Addition, which currently contains the Dale
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Tile Building and an off site parking lot for the Northwest Racquet Club; on the south by
Lakebreeze Avenue with the racquet club on the opposite side of that street; and on the west by
Azelia Avenue and Lots 1 and 2 Block 1, Joslyn Addition, containing the entrance into the
• Wickes development and vacant land containing some of the monitoring equipment for the
former Joslyn site. On the opposite side of Azelia is roe zoned R -4 Multi Residence
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containing an apartment building and other residential property.
The applicant proposes in this second phase of the redevelopment to construct a 110,700 sq. ft.
speculative office /industrial building on this eight acre site. The proposed use is a permitted use
in this I -2 zoning district. The site under consideration is a portion of the Joslyn property and the
old Davies Water Company property that are being combined under the above mentioned plat.
The Joslyn Pole Yard property, as the Commission is aware, was listed as a federal "super fund
site" and had been undergoing a clean up of the property to an industrial standard under a
supervised agreement with the Minnesota Pollution Control Agency (MPCA). The clean up has
proceeded to a point where the U S Environmental Protection Agency delisted the Joslyn
Manufacturing and Supply Company site (except the westerly portion) from the National Priority
List. On June 1, 2000, the MPCA delisted the site (except for the westerly area) from the State
of Minnesota's permanent list of priorities (see attached correspondence dated June 12, 2000).
As with the development of the Wickes Distribution Center, this proposal can proceed provided
development on the former Joslyn site is consistent with the MPCA approved report entitled
"Developers Response Action Plan Addendum and Work Plan for Implementation of the Joslyn
Site ". Attached is a September 1, 2000, letter from MPCA acknowledging that the plans
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submitted are consistent with the above mentioned report but that possible future access road •
construction would be subject to a deed restriction on the site that will require additional
submittals from the property owner if such plans go forth.
The City has established a Soils Tax Increment Financing District (TIF) to assist in the
redevelopment of this property that was in effect at the time of the Wickes Distribution Center
development and also encompasses a development agreement to proceed with a three phase
redevelopment of the property in question. Again, this is phase two of that three phase
redevelopment.
ACCESS/PARKING
Access to the site is to be provided at two locations. One is a shared access off of Lakebreeze
that will serve this site (primarily the loading dock area at the rear of the building) and the phase
three development lying further to the east. The other access point will be to the main parking
facility for the site off of Azelia Avenue directly across from the access leading to the Wickes
Distribution facility.
Also, as the Commission is well aware, the Minnesota Department of Transportation (MNDOT)
is preparing for an upgrading of TH 100 from Golden Valley to Brooklyn Center in various
phases over an approximate five year period. Part of that improvement will be the development
of an interchange at France Avenue requiring the raising of the Soo Line Railroad bridge over
TH 100. This will cause a need to redo access in this immediate area. Current plans are that •
France Avenue will no longer be a through route because of the grade problems at the Soo Line
crossing. Access through the area has been determined to be by extending Azelia Avenue and
tying it into 50th Avenue at France Avenue. There has been more discussion with respect to this
plan and various meetings have been held along with the City retaining a consultant (Short Elliott
Hendrickson) to facilitate discussion between neighboring concerns and Highway Department
concerns. To date no additional right of way has been acquired to extend Azelia Avenue through
this area and the development plans and platting that has gone forward indicates Azelia ending in
a cul -de -sac at the approximate location of the Wickes Distribution Center access. However, the
site plans approved, and the plan at hand, both allow for the extension of Azelia to the north and
do not interfere with such roadway planning. It should be noted that if changes to these plans
result in a need for an alternate route as has been proposed by some neighboring property owners
that it can be accommodated on the area proposed for the third phase in this redevelopment
project. Therefore, it seems appropriate at this time to proceed with the site and building plan
review for the proposed 110,700 sq. ft. phase two industrial building.
Again, the access from Lakebreeze will be primarily a truck access shared with the neighboring
property to the east leading directly to the loading facilities behind the proposed building. This
driveway width slightly exceeds the 30 ft. wide driveway maximum that is typical in most
commercial and industrial developments. Allowing the 40 ft. width without concrete delineation
09 -14 -00 •
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• will accommodate semi truck movement which will be in and out of this area. The other access,
off Azelia Avenue, is limited to a maximum of 30 ft. in width and will accommodate primarily
non -truck traffic. Access to parking spaces can be gained around the entire building. Parking for
this 110,700 sq. ft. facility is based on a combination of the office parking requirement (one
space for every 200 sq. ft. of gross of floor area) and the industrial parking formula (one space
for every 800 sq. ft. of gross floor area). The plan calls for 26,675 sq. ft. of office space
requiring 136 parking spaces and 83,025 sq. ft. of industrial, manufacturing and warehouse space
requiring 104 parking spaces. A total of 240 parking spaces are required for the entire site given
the proposed office to industrial mix anticipated by the plan. The applicant's plan provides 227
parking spaces to be located around the north, west and south sides of the building and 13 "proof
of parking spaces" to be located to the rear of the building and are designated as dotted lines on
the site plan. Such an arrangement appears to be appropriate given the size of the building and
the great amount of parking already being provided. It is not certain that the actual occupancy
for office space will be as proposed because the building is speculative in nature at this time.
However, if necessary, the additional 13 parking spaces could be provided b the applicant in the
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future.
B -612 curb and gutter is required around all driving and parking areas and is noted on the site
I plan. The loading dock areas are accessed from the common access to the east. The building
elevations show the potential for 12 loading docks along the west wall of the building servicing
the site. Access to the office areas would be along the west and south elevations where more
• store front or office accommodations are provided.
GRADING/DRAINAGE/UTILITIES
The applicant has provided a grading and drainage plan showing a storm water detention pond
and silt fencing for erosion control. The applicant is required to receive Shingle Creek
Watershed Management Commission approval of their plans and is providing a detention pond to
service this area which will be located off site to the northwest of the building itself lying
between this facility and the Wickes Distribution Center. The storm water detention pond would
lay to the west of Azelia Avenue if it is extended as has been proposed by MNDOT. As
mentioned previously, the plan has been submitted to the MPCA for their review and is
acceptable. Their plans call for working around containment areas and monitoring wells on the
site which will need to continue in order to monitor and treat ground water on the site. Drainage
from the paved areas will be handled by storm sewer which will collect water in catch basins
located around the perimeter of the property to be conveyed into the proposed storm water
detention pond. It is anticipated that the applicant's watershed plan will be on the Watershed
Commission agenda for September 14, 2000. The City Engineer is reviewing the grading,
drainage and utility plans and will be offering written comments.
1 One particular matter that will need to be addressed is a modification to the grading plan to
indicate a 4 ft. To 4 '/2 ft. high berming area to be located in an approximate 42 ft. green strip
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Page 3
along Azelia Avenue. City ordinances require screening of activity areas where industrial
property is across the street from multi residentially zoned property as exists in this situation.
The applicant's have provided a cross section detail showing an approximate 4 to 4 1 /2 ft. high
rise in the reen strip area for the purpose of primarily screening vehicles located in the parking
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lot from the residential area across the street. The grading plan does not show such an elevation
change and should be modified prior to the issuance of building permits to acknowledge this type
of berm. City ordinances require a minimum 25 ft. buffer area where industrial zoned land is
located across the street from multiple residential land. Activity areas are to be effectively
screened from view in a manner approved by the City Council. Section 35 -711 of the city
ordinances also requires parking lot screening where parking of more than six vehicles is across
the street from residentially zoned property. No specific screening height is indicated in the
ordinance, however, such areas are to provide effective screening at least of this parking area. It
appears that the 4 1 /2 ft. high berming proposed would be effective provided the 4 1 /2 ft. rise is
measured from the parking lot rather than from the street elevation.
A six inch water line will be provided along the east side of the building tying into an 8 in. water
main that is located in Lakebreeze Avenue. The sanitary sewer connection will also be from
Lakebreeze tying in at the southwest corner of the building. The building is to be equipped with
an automatic fire extinguishing system that meets NFPA standards and is required to be
monitored through a central monitoring device. The site plan currently shows the building being
serviced by four fire hydrants, two of which are existing along the west side of the building and
two new proposed hydrants, one at the northeast corner and the other at the southeast corner of •
the building. Further review of the number and locations of fire hydrants by the Building '
Official and Fire Chief is in order.
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LANDSCAPING
The applicant has submitted a landscape plan in response to the landscape point system used to
evaluate such plans. This 8+ acre site requires 522 landscape points. The applicant's proposals
provides 522 points through a variety of plantings. The plan calls for 260 points in shade trees
including Patmore Ash, Greenspire Linden, Green Column Maple and Northwood Red Maple;
204 points in evergreen trees including Austrian Pine and Black Hills Spruce; 26 points in
ornamental trees including Adams Crabapple, Amur Maple, Japanese Tree Lilac; and 32 points
in shrubs including Black Chokeberry, Mohican Viburnum, Gold Flame Spirea and Sea Green
Juniper. The landscaping is spread out uniformly around the large green strip areas along Azelia
and Lakebreeze Avenues with some landscaping around the building foundation. Shade trees are
interspersed with coniferous trees in the green strip along Azelia Avenue adding to the
approximately 4 1 /2 ft. high berm in this area to provide screening as mentioned above. The
Planning Commission should recommend whether or not this is considered to be appropriate
screening as per the ordinance requirement. The same pattern of shade trees and coniferous trees
continues around the west and north portions of the parking lot. That pattern is also in the green
strip area along Lakebreeze Avenue. Five evergreen trees are provided in a planting area at the
09 -14 -00 •
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southeast corner of the site to assist in some screening of the loading area. The shrubs and
ornamental trees are used as foundation plantings close to the building and in island areas at the
corners of the building.
All in all the landscape plan appears to be appropriate, provided the Commission concurs in the
required screening.
BUILDING
The applicant has provided building elevations and a floor plan for this speculative
office /industrial building. The building elevations show the location of loading docks on the east
side of the building and the office /store front exterior along the west and south sides of the
building. The exterior finish is to be a pre -cast wall panel with 12 in. reveals that are carried
around the building. The west elevation provides glass entry doors and store front windows at
the various office locations. The color is not yet indicated on the plan.
LIGHTING/TRASH
I
The applicant has submitted a lighting plan indicating compliance with City ordinances. The
plan shows a mixture of free standing and wall mounted lighting. There are fourteen
freestanding light poles located around the perimeter of the parking lot. These are 400 watt
lights that are 25 ft. in height. No fixture is shown, however, they should contain lenses,
• reflectors or shades so as to concentrate illumination on the property and to prevent glare off site.
The foot candles shown on the lighting plan do not exceed those authorized by City ordinance.
The plan also calls for 10 building mounted light fixtures, 6 along the west elevation and 2 each
on the north and south building elevations. These also are 400 watt lights and should contain the
same type of shading and reflectors as the freestanding lights directing light downward on the
site and avoiding glare. Five 1,000 watt lights will be located on the east building wall to light
up the loading dock area.
The plan does not show any outside trash area. Apparently trash will be contained within the
building. If, however, there are trash facilities out of doors, or compactors, they must be
screened with a screening device that matches the building exterior and contains a solid opaque
gate.
There is no place on the site plan that is indicated for the outside storage of trailers. The
receiving and loading dock areas are not of sufficient size to accommodate dead storage of
trailers and it is, therefore, not comprehended as part of the site plan. If such activity is to be
undertaken, the plan must be expanded to show a specific trailer storage area which should be
screened, otherwise no such storage activity should take place on the site.
09 -14 -00
Page 5
RECOMMENDATION •
All together the plans appear to be in order, however, there are some minor modifications that
need to be made such as the grading plan corresponding with the berming to be provided in the
green strip areas along Azelia Avenue. Approval of the application should be subject to at least
the following conditions:
1. The building plans are subject to review and approval by the Building Official
with respect to applicable codes prior to the issuance of permits.
2. Grading, drainage and utility plans are subject to review and approval by the City
Engineer prior to the issuance of permits.
3. A site performance agreement and supporting financial guaranty in an amount to
be determined based on cost estimates shall be submitted prior to the issuance of
permits to assurance completion of site improvements.
4. Any outside trash disposal facilities and rooftop or on ground mechanical
equipment shall be appropriately screened from view.
5. The buildings are to be equipped with an automatic fire extinguishing system to
meet NFPA standards and shall be connected to a central monitoring device in
accordance with Chapter 5 of the City Ordinances.
6. An underground irrigation system shall be installed in all landscaped areas to
facilitate site maintenance.
7. Plan approval is exclusive of all signery which is subject to Chapter 34 of the City
Ordinances. •
8. B -612 curb and gutter shall be provided around all parking and driving areas with
the exception of where surmountable curb is provided for handicapped
accessibility.
9. The applicant shall submit an as-built survey of the property, improvements and
utility service lines prior to release of the performance guaranty.
10. The property owner shall enter into an easement and agreement for maintenance
and inspection of utility and storm drainage systems prior to the issuance of
permits.
11. The applicant shall provide appropriate erosion and sediment control devices on
the site during construction as approved by the City Engineering department.
12. Storm water drainage systems and the detention pond shall be approved by the
Shingle Creek Management Commission prior to the issuance of permits.
13. All work performed and materials used for construction of utilities shall conform
to the City of Brooklyn Center current standard specifications and details.
14. The plans shall be modified prior to the issuance of permits to indicate the nature
and extent of berming to be provided in the green strip areas along Azelia and
Lakebreeze Avenues. The rise of said berming shall be at least 4'/2 ft. measured
from the elevation of the parking lot.
09 -14 -00
Page 6 _
• 15. There shall be no dead storage of trailers on the site. Said vehicles are to be
parked or stored at loading dock areas only.
16. The plat approved under Planning Commission Application No. 2000 -018 shall
receive final approval by the City Council and be filed with Hennepin County
prior to the issuance of building permits.
•
• 09 -14 -00
Page 7
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Minnesota Pollution Control Agency
June 12, 2000
Mr. Francis X. Lyons
Regional Administrator
U.S. Environmental Protection Agency
77 West Jackson Boulevard
Chicago, IL 60604 -3590
RE: Concurrence with the Partial Deletion of the Joslyn Manufacturing and Supply Company
Superf ind Site from the National Priority List
Dear Mr. Lyons:
The Minnesota Pollution Control Agency (MPCA) concurs with the decision of the
U.S. Environmental Protection Agency to delist the Joslyn Manufacturing and Supply Company
• Site (`'Site's (except the West Area) from the National Priority List. The portion of the Site
being proposed for delisting consists of Lots 1, 2, and 3 of the Site (see the attached survey map).
The decision is based upon the fact that the responsible party has implemented appropriate
response actions for Site soils (Operable Unit 4) and that no further Superfund response is
appropriate for Site soils (except in the West Area) in order to provide protection for human
health and the environment.
On June 1, 2000, the MPCA delisted the Site (except for the West Area) from the State of
Minnesota's Permanent List of Priorities (see attached memorandum from Commissioner
Studders to Timothy Scherkenbach).
Sincerely,
James L. Warner, P.E.
Director
Metro Division
JLW:csa
Enclosure
• cc: Carl Grabinski, Joslyn Manufacturing Company
Maclay Hyde, Real Estate Recycling
520 Lafayette Rd. N.; St. Paul, MN 55155 -4194; (651) 296 -6300 (Voice); (651) 292 -5332 (TTY)
St. Paul • Brainerd • Detroit Lakes • Duluth • Mankato • Marshall • Rochester • Willmar; www.pca.state.mn.us
Equal Opportunity Employer • Printed on recycled paper containing at least 20% fibers from paper recycled by consumers.
x "
aF•0000s•os (creel •
DEPARTMENT:. POLLUTION CONTROL AGENCY STATE OF MINNESOTA
Office Memorandum
DATE: June 1, 2000
To: Timothy K. Scherkenbach It 16 k
Division Director
Policy and Planning Division JUN
FROM, Karen A. Studders MBA Metrp 9 16 b i
Commissioner Sit Rernedlat
PHONE: (651) 296 -7301
SUBJECT: Approval of a Partial Deletion of the Joslyn lytanufacturing and Supply Compaay_Site
frvrn the Minnesota Environmental Response and Liability Act Permanent List of
Priorities
Pursuant to the Minnesota Environment Response and Liability Act, Minn. Stat § ] 15B.17 (1998), and
Minn. R. ch. 7044 (1999), the Minnesota Pollution Control Agency (MPCA) proposed a modification to
the Permanent List of Priorities (PLP). The State Register notice of this proposed modification of the
PLP was published on May 17, 1999, with the public comment period ending on June 17, 1999 (see •
Attachment 1).
The MPCA proposed the deletion of a portion of the Joslyn Manufacturing and Supply Company (Joslyn)
site, Brooklyn Center, Hennepin County. The MPCA proposed to delete all areas of the site, except for
what is known as the "West Area" (see Attachment 2). The MPCA received no comments concerning
this proposed partial site deletion:
S
in addition, Minn. Stat. § 116.03, subd. 1(c) (1998), authorize/the Commissioner of the MPCA to make
decisions on behalf of the MPCA concerning the deletion of sites from the PLP. Therefore, on behalf of .
the MPCA, l hereby delete from the PLP the portion of the Joslyn site that is described in Attachment 2.
KASjmn
Attachments
cc: Jocelyn Olson, Attorney General's Office
Jim Warner, MPCA, MDMO
Jerry Stahnke, MPCA, MDSR
Mark Schmitt, MPCA, PPRF
Barb Jackson, MPCA, MDSR
Mike Kanner, MPCA, MDSR
Bruce Bron, MPCA, MDSR
Dave Douglas, MPCA, MDSR
TTY (for hearing and speech inlPHINd only): (6511282 -5332
Primed on recycled paper ca tatnh,g a, least 10%fibersJrrirn paper recycled by woutnners
i
lift Minnesota Pollution Control Agency
of
September 1, 2000
Mr. Maclay R. Hyde
Real Estate Recycling LLC
3060 Metropolitan Centre
333 South Seventh Street
Minneapolis, MN 55402
RE: Joslyn Site
MPCA Project Number VP 9730
Dear Mr. Hyde:
The Minnesota Pollution Control Agency (MPCA) staff in the Voluntary Investigation and Cleanup Unit
hereby acknowledges that the latest plans for site preparation and civil work as noted below are
consistent with the MPCA approved report entitled "Developers Response Action Plan Addendum and
Work Plan for Implementation Joslyn Site — Lot 2 and Lot 3 ", dated January 14, 2000, submitted by
Geomatrix Consultant (Addendum Number 4). This report was approved by the MPCA on February 18,
• 2000. The civil plans which were reviewed for consistency are:
• f A01— Title Sheet
Al. 1— Site Plan
• Preliminary Plat of Joslyn Second Addition
• C -1— Grading, Drainage, and Erosion Control
• C -2 - Utility Plan
• L-I — Preliminary Landscape Plan
The MPCA points out that while Azalia Avenue was depicted in Addendum Number 4 as a possible
future access road, the construction of this road would be subject to a deed restriction on the Site that
will require additional submittals from the property owner for review and approval by the MPCA
Commissioner before construction would be allowed. In addition, a "Supplemental Fence Management
Plan" submitted on August 31, 2000, which is a revision to Addendum Number 4 is currently under
review by the MPCA staff.
If you have any questions on the above, please contact me at (651) 297 -1459.
Sincerely,
Gerald J. Stahnke
Project Manager
• Voluntary Investigation and Cleanup Unit
Site Remediation Section
Metro District
GJS limp
520 Lafayette Rd. N.; St. Paul, MN 55155 -4194; (651) 296 -6300 (Voice); ( 651 ) 292 -5332 (TTY)
St. Paul •Brainerd ^Detroit Lakes m4m -il Duluth cclad ape l rcontaining atheast 20 bers paper recycled byPconsumter mn.us nn
• MEMORANDUM
p
DATE: September 11, 2000
TO: Ron Warren, Planning and Zoning Specialist
FROM: Todd Howard, City Engineer IA"',
SUBJECT: France Avenue Business Park - Building #2
I have reviewed the subject drawings dated 8 -31 -2000 and have the following comments to offer at this
time.
• The property owner shall be required to enter into an agreement for maintenance and inspection
of storm drainage and utility facilities prior to the issuance of a building permit.
• Drainage is shown to be directed from the Building #2 site to a pond on the Wicks site. A cross
agreement must be developed allowing drainage and ponding on the Wicks site. Proof of this
private agreement shall be provided to the City prior to issuance of a building permit.
0 The berm shown on sheet A8.2 is not reflected on the grading plan. In addition, the plan
reflects grading on Canadian Pacific Rail property on filling a section of Lakebreeze Avenue. A
• revised grading plan should be submitted for review and approval prior to issuance of a building
plan.
• ' Erosion control on the existing site has been problematic. An erosion control plan of ringing
the site with silt fence is inadequate. A revised erosion control plan should be re- submitted and
address the following: the location of the construction access to the site, turf establishment,
construction staging and street sweeping. If grading is to occur on the future Building #3 site,
then the erosion control plan should include that work.
• The water main shall be looped and constructed in accordance with City Standards. A copy of
the City Standards will be furnished to the Developer.
• Catch Basins S & T should be relocated away from the existing water main.
• The tapping of the new water main shall be accomplished through directional boring or by open
cutting the road. Note that traffic control will be required and that complete road closure will
not be permitted. 48 -hour notice shall be given to the city prior to starting work and road
restoration shall be required withing 24 hours of beginning work.
N
0 The Azelia Avenue access is wider and has larger radius than needed to accommodate cars.
• The final plat is currently under review by MnDOT, the City Attorney, and the Engineering
Department and is tentatively scheduled for City Council consideration on September 25, 2000.
• Any required changes as a result of this review may affect the site plan.
9 -5 -00
SHINGLE CREEK WATERSHED MANAGEMENT COMMISSION
PROTECT REVIEW SC 2000 -18• REAL ESTATE RECYCLING/TOSLYN ADDITION
Owner Twin Lakes Business Park, LLC
c/o Paul Hyde
3060 Metropolitan Center
333 South Seventh Street
Minneapolis, MN 55402
Purpose Approval of a Stormwater Management Plan for the redevelopment of a
warehouse/office facility.
Location South of the Soo Line Railroad, east of Twin Lakes, northwest of TH 100, north
of Lake Breeze Avenue at Azela and Lakeview Avenues in Brooklyn Center, MN.
Exhibits 1. Project Review Application submitted by VAA, Inc., August 31, 2000.
2. Stormwater calculations submitted and prepared by VAA, Inc., revised
August 31, 2000.
• 3. Plan sheets C1 -C4 submitted by VAA, Inc., August 31, 2000.
Findings 1. The total site area is 16.91 acres. Of this proposed area, 13.07 acres are
impervious (C =0.95) and 3.84 acres are pervious (C=0.3) (Lot 2 to be
constructed now, Lot 3 in the future).
2. A stormwater pond is being proposed on site to provide treatment for runoff
from the entire site. This pond discharges into an existing storm sewer, a
second existing stormwater detention basin, and then flows to Twin Lakes
(MnDNR protected water 42P) via surface drainage.
3.. An Erosion Control Plan was provided. Silt fence was not included around
the proposed detention pond.
4. The pond was designed with a clay liner which will maintain the water level
at the outlet elevation (858.8 feet). The "Treatment" elevation will therefore
become the 'Permanent Pool' elevation when the pond fills. Therefore, the
10:1 bench should be placed 1 foot below elevation 858.8 feet, not 856.3
feet.
5. It appears that adequate deadpool was provided below the "Treatment"
• elevation (858.8 feet). This volume should be recomputed once the 10:1
bench is relocated.
PROTECT REVIEW SC 2000 -18• REAL ESTATE RECYCLING /JOS ADDITION
provided at the outlet for skimming. The baffle structure •
6. A baffled weir was p g
extends 3 inches below the normal water elevation. Velocity computations
and a plan view of the 'skimmer were not provided. No aggregate was
placed at the skimmer and an anti - seepage collar was not included.
7. The active pool was designed to limit proposed 100 -year, 30- minute
discharges to existing.
8. The outlet was designed so the detention time of the runoff from a —inch
rainfall was 6 hours.
9. An emergency overflow was provided.
10. Average depth computations were not provided. These should be
recomputed once the. 10: 1 bench is relocated.
11. No review fee payment was received.
Recommendation Approval pending receipt of
1 . An Erosion Control Plan showing silt fence around the proposed •
ponding site.
2. A plan showing the relocation of the 10:1 bench to 1 foot below the
outlet elevation.
3. Computations showing adequate deadpool volume and average depth
for the regraded detention pond.
4. A plan view of the baffled weir showing the length required to limit
the discharge velocity to 0.5 feet/second per NURP standards. The
baffled weir detail should also include a 4 -inch overlap of the
structure below the normal water level.
5. Computations showing that the proposed discharge rates for the
1 -year and 100 -year, 24 -hour rainfall events are limited to existing
discharge rates.
6. Payment of the $1,000.00 review fee.
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PROJECT REVIEW SC 2000 -18• REAL ESTATE RECYCLING/ OSLYN ADDITION
• 7. A legal description or plat granting an easement over areas used for
stormwater runoff treatment.
MONTGOMERY WATSON
Engineers for the Commission
9 -14 -00
Edward A. Matthiesen, P.E. Date
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