HomeMy WebLinkAbout2008-12-23 Bonestroo Report • • 2335 Highway 36 W
St. Paul, MN 55113
Tel 651.636 -4600
Fax 651 - 636 -1311
www.bonestroo.com
December 23, 2008 Bonestroo
Mr. Eric Johnson
City Administrator
City of Oak Park Heights
14168 Oak Park Blvd., P.O. Box 2007
Oak Park Heights, MN 55082 -2007
Re: City Hall Site
Plan Submittal
Bonestroo File No.: 55 /gen
Dear Eric:
We have review the plans dated December 12, 2008 for the City Hall Site as submitted by
Buetow & Associates. Following are our comments and /or recommendations.
DRAWING C1
1. Call out number 12 is shown on the existing building; however, it is not identified in the
Demolition Key Notes.
2. The existing water service at the south end of the existing building is in bold print, but it
is not identified with a call out.
3. The City Arborist should provide comments /recommendations in regards to the tree
removals.
DRAWING C2
1. Drain tile shall be placed in any pavement sections that have a sand subbase.
2. Consider adding a walk/pathway around the north /northeast side of the proposed PW
storage yard to connect to the sidewalk to city hall. This will provide pedestrians from
the Pine Grove Gardens area a more direct access to city hall.
DRAWING C3
1. Show drainage arrows and label percent slopes.
2. Identify the slopes as ratios in the pond area and other restored areas (ex. 4:1).
3. Identify the locations of the emergency overflows.
St. Paul
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City of Oak Park Heights Page 2
City Hall 12 -23 -08
4. Provide more grading detail /spot elevations at the following locations:
-Trash enclosure
- Sidewalks (cross slopes)
- Curb cuts at pedestrian ramps.
- Concrete stoops
5. At the southwest corner of the impound lot the proposed grade is 948.18 and the
elevation to the east is at 947.0 for a slope of approximately 8 %. Is it possible to flatten
this grade?
DRAWINGS C5
1. The slope on the sanitary sewer shall meet the Minnesota State Plumbing Code
4715.2400. For an 8" pipe the required slope is 0.52%
2. As discussed above, drain tile shall be placed in pavement sections with a sand subbase.
At a minimum, the drain tile shall be placed at the low points and extend 20 feet in each
direction from the catch basin.
3. The storm water reports states that there are Type D soils in this area. Will there be
drain tile around the footings of the structures? If so, show elevation of the drain tile,
locations and discharge locations.
4. Insulation shall be placed at all water main /storm sewer crossings.
5. Verify with the Public Works director that the submerged pipe on the outlet structure is
acceptable. If the submerged pipe is approved it should be increased to 21" to provide
area for sediment build -up.
6. Provide a separate submittal that identifies the drainage path of the pond discharge.
Verify that the storm water is not impacting any commercial or residential areas.
7. Under Note 5 the class of RCP shall be changed to Class V for all 12 ", 15" and 18" RCP.
8. Under Note 11 it should state that any DIP sanitary sewer shall be poly lined.
9. Note 14- The City of Oak Park Heights does not officially have standard specifications;
therefore specifications will be required for this project.
GENERAL COMMENTS
1. The drawings are missing items such as structure /invert elevations, callouts,
structure schedule, details, etc... A more detail review will be performed as the
construction documents progress.
2. The following items should be submitted for review:
- Rational Calculations for storm sewer.
- Response comments from Middle St. Croix Watershed Management Organization
- Final Geotechnical Report
3. The storm water report discusses a Bio- Retention Basin. Where is this located on the
site?
4. Verify with the Middle St. Croix Watershed Management Organization that the
proposed 9600 cf discharge into Wetland C is acceptable.
• •
City of Oak Park Heights Page 3
aty Hall 12 -23-08
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 me at (651) 604 -4788 or
Dennis Postler at (651) 604 -4815.
Sincerely,
BON TROO
Karen S. Erickson, P.E.
cc: Tom Ozzello, Public Works Director
Jim Butler, Building Official
Scott Richards, City Planner
Mark Vierling, City Attorney
Randy Engel Buetow & Associates
DMP, CWL -2, File — Bonestroo
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° POL -1 ° Type II n 100 (100) PS, HPS ° 120 ° Bolt -On Arm 6" ° Bronze Photocell & Receptacle
F lat Glass ( T 2 ) 0 1 50 (150) PS, HPS ( (BOA6) (BZ) *Specify voltage � °
(Convex Glass 0 175 (175) MH,PS °Black ° (PC120) ° (PC208) „ is
Optional) 0 250 (250) MH,PS, HPS ° 208 (BK) ° (PC240) ° (PC277) a '-
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(4) (WM) 0 Grey 'Cast Wall Plate (GY F , , -
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(5) (SL) *Specify voltage " ` ) I '
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Standard for all other mounting 0 RPP - ``
400 & 1000W configurations. . Round Pole Plate Adaptor
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• The computerized CNC machinery enables all Polera housings to be con- mounting to 3" -5" Round Poles. '
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All external hardware is stainless steel. Electrical Assembly ':::''''
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• Removable Door assembly is CNC precision, sheared and formed from degrees Fahrenheit. Available in:
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• The lens is a tempered clear safety glass, secured by galvanized Tens • Metal Halide (MH)
retainers and sealed with silicone gasketing to provide complete weather • Pulse Start Metal Halide (PS)
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• Socket is glazed porcelain medium or mogul base with nickel plated
• J Vision TM Optical System (Patented) contacts, rated at 4K (5K for 1000 watt) and 600V.
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