HomeMy WebLinkAbout2008-07-10 BRAA Ltr to OPH Re Construction Documents Review2335 Hi 36 W
St. Paul, MN 55113
Tel 651-636-4600
Fax 651-636-1311
www.bonestroo.com
hil 10, 2008
Mr. Eric Johnson,
Cit Administrator
Cit of Oak Park Hei
14168 Oak Park Blvd., P.O. Box 2007
Oak Park Hei MN 55082-2007
Re: Boutwell's Tunnel- 58 1h Street N
r
Co p; t r1 j rt;, , Documrints llovia%,A,
Bone.r,troo file No. 55-08-000
Dear Eric:
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A&. Bonestroo
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We have reviewed the construction documents for the Boutwell's-58 1h Street Tunnel Project as submitted b
Folz, Freeman, Erickson, Inc. Followin are our comments and/or recommendations.
I A hatch pattern has been added that identifies the replacement of the bituminous pathwa on the
south side of 58th Street N. This hatch should be identified in the le
2. The at- g rade cross walks shall have si at the crossin and prior to the crossin The si
as the crosswalks shall be as follows:
• W 11 -2A (36 x 36)
• W 16 -2A (24 x 18)
• S2-P2 (24x18).
3. A crosswalk has been added on 58`h Street at the west side of Norwich Avenue N. At this location
a pedestrian ramp is re on the south side of 58th Street.
1. On the Utilit Notes chan the classification of the 1 and 18" RCP from Class IV to Class V.
Lett
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St. Paul
St. Cloud
Rochester
Milwaukee
Chicago
City of Oak Park Heights
Boutwell's Tunnel- 58th Street N.
Page
Jul 10, 2008
1. Detailed desi drawings for the pedestrian tunnel have been submitted to the City and are
currentl bein reviewed.
2. The will be a concentrated load on the existing 24" RCP storm sewer, How will this load be
bridged to protect the integrity of the storm sewer?
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1.
The detail for the tun,nel shows a drain tile along the footings. Where is the discharge point for the
drain tile?
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1.On detail 1/C7.3 the 4Sbend should be extended from 5'to15' beyond the edge of the footing.
This length is necessary to avoid differential lateral pressures on the tunnel if in the future,
excavat of the water main is required.
General Comments
I . The followin items still need to be submitted for review:
a Copy of the Approval letter from the Middle St. Croix Watershed.
b, Cop of an comments from the Browns Creek Watershed District.
The plans will require further review when items discussed in this letter are submitted. If you have any
questions or require additional information, please contact meat (651) 604-4788 or Dennis Postler at (651)
Sincerely
B ONESTROO
Karen S. Erickson, P.E.
cc: TomOzzeUo, Public Works Director
Jim Butler, Building Official
Scott Richards, City Planner
Mark VierUng City Attorney
Todd Erickson-Fo|z, Freeman Erickson, Inc.
DMP Fi|e — Bonestroo