HomeMy WebLinkAbout2005-10-17 BRAA Ltr to OPH Re Storm Water Plan ReviewBonestroo
Rosene
Anderlik &
Associates
En & Architects
October 17, 2005
5 West Hi 36 • St. Paul, MN 55113
Office: 651-636-4600 n Fax: 651-636-1311
www.bonestroo.com
Mr. Eric Johnson
Cit Administrator
Cit of Oak Park Hei
14168 Oak Park Blvd., P.O. Box 2007
Oak- Park Ilel v_ 550`82'-12007
Re: Wal -Mart Expansion
Plan Review- Storm water Review
BRA File No. 55-05-000
Dear Eric:
J
We have reviewed the storm sewer calculations and the storm water modelin for the
proposed Wal-Mart expansion as submitted b McCombs, Frank Roos and Associates,
Inc. Followin are our comments and/or recommendations.
Comments/Recommendations
1. The most current set of plans we have in our office is dated Januar 12, 2005. We
re an updated plan set.
2. The existin storm sewer s located in the existin parkin area conve
%.V1 "c- 1-o-n-A -,- th-�- West S'de o-1"*-or1a1'- A -*. Y CrIU1010. T T ndor t"
storm watc%r runo P 1_1" *J111 41 �_'/ ?. I _L 1- 1 1 %_" .1 Y uix %.A "i-LL,
proposed conditions additional runoff has been added to the s resultin in
the existin 36"stonn sewer from existin manhole G to the existin flared end to
become surchar in a 10 y ear event. (See attached). In addition, it is proposed
to raise the NW of the pond, which results in the flared end section bein 8
inches underwater and water backed up past CBMH 19. It is recommended that
chan be made to reduce the runoff enterin this existin storm sewer.
3. Verif that the proposed flared end sections enter the ponds at the Normal Water
Level.
4. Provide detail of outlet for pond 2P and for the modification of the outlet of the
existin pond.
St. Paul, St. Cloud, Rochester, MN K Milwaukee, Wl N Chica IL
Affirmative Action/E Opportunit Emplo and Emplo Owned
Amore comprehensive review of all issues will be conducted when final development
plans are submitted. If y ou have an q uestions or re additional information, please
contact me at (651) 604-4788 or Dennis Postler at (651) 604-4815.
Sincerel
BONESTROO, ROSENE, ANDERLIK & ASSOCIATES, INC.
Karen S. Erickson, P.E.
cc: Jud Holst, Finance Officer
Tom Ozzello, Public Works Director
Jim Butler, Buildin Official
Scott Richards, Cit Planner
Mark Vierlin Cit Attorne
Kath Widin, Cit Arborist
Erik W. Miller- McCombs Frank Roos & Associates
DMP, DDH, File — Bonestroo & Associates
KA55155private\NValmart expaiision\Joliiisoii—KSE'walniart stormwater storm sewer 10-1 7-05.doc
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