HomeMy WebLinkAbout2004-09-29 Stevens Engineers Ltr. to OPHSeptember 29, 2004
STEVENS
ENGINEERS
Mr. Eric A. Johnson, Cit Administrator
Oak Park Hei Cit Hall
14168 Oak Park Blvd
P.O. Box 2007
Oak Park Hei MN 55082-3007
Re: Fox Hollow PUD
Response to Gradin Plan and Utilit Review
Our File No. 5046
Dear Mr. Johnson:
Please find below our response to the Cit En review comment letter dated Au 17,
2004 for the above referenced project.
Site La and Utilit Plan - Sheet 2 of 7
1. The flow of traffic around the island will be one wa Pavement markin and si will be
added to this drawin for clarification.
2. All parkin stalls will be 18' deep. The drawin will be corrected.
3. The intention on the preliminar plan was to provide accessible aisles via the adjacent
sidewalks. The plans have been revised to include traditional access isles in parkin lot,
4. The handicap parkin stall located in the parallel parkin area have been relocated to the west
and are no lon in the parallel parkin area.
5. Curb ramps will be shown on the final drawin
6. Will be coordinated on the final drawin
7. B618 curb and g utter re per meetin with Cit Staff on 7-28-04. Will be noted on
drawin
8. 5' separation will be met on final drawin
9. Covers will be specified for curb boxes in pavement.
10. Chan will be made on the final drawin
1
1656 Livin Road • Hudson, WI 54016
715-386-5819 • 651-436-2075 • 800-822-7670 • fax: 715-386-5879 • www.stevensengineers.com
11. After discussing connecting to the existing water main with Tom ozzello, City Public works
Director, it was determined that the best method of connecting would be to isolate the existing
water main and make the connection between the hours of midnight and 5am, This will be
specified in the contract documents,
12. A final set of plans will be submitted to the Building Inspector and Fire Department for review of
water main sizing. Separate fire and domestic waterlines will be shown on final drawings for
each building. After further review it was determined that a hydrant will be located in the
development adjacent to the small office building.
13. Change will be made on final drawings,
14. Detail to be included on final drawings,
Grading Drainage and Erosion Control - Sheet 3 of 7
1. Change will be made on final drawings.
2. Slopes will not exceed 3:1 in drainage or utility easement area except where proposed slopes
on Xcel Energy's property tie into existing slopes.
3, Detailed drawings of the retaining wall will be submitted to the City for review and approval
when completed,
4. Change will be nude on final drawings,
5, The Pond side slopes have been change to accommodate a maintenance bench. The cross
slope of the bench will be approximately 7:1.
8, Change will be made on final drawings.
Storm water Pollution Prevention Plan and Erosion Control Plans:
7. This item will be covered by an amendment to the plan.
8. This item will be covered by an amendment to the plan,
0. This item will be covered by an amendment to the plan.
10. Inspection reports will be routed to the City weekly or after each 0.5 inch rain event. This item
will be covered by an amendment to the plan.
11. This item will be covered by an amendment to the plan and included on the final drawings.
PJ
Temporary Erosion Control Plan;
12. This item will be covered by an amendment to the plan and included on the final drawings.
13. This item will be covered by an amendment to the plan and will be included in the final
drawings,
14. This item will be covered by an amendment to the plan and included on the final drawings.
15. This item will be covered by an amendment to the plan and included on the final drawings.
10. This item will be covered by an amendment to the plan. We proposed the following general
construction schedule:
Fail 2004: Rough grading
Storm and Sanitary Sewer Installation
Water main Installation
Parking Lot subgrade
Retaining Walls
Storm Water Pond
Parking Lot Aggregate Base Course (depends on weather)
Building Pads
Site Restoration
Erosion Control
Spring /Summer: Buildings
Fall 2005: Parking Lot curb and Gutter, Paving
Site Restoration
Project complete in fall of 2005. Will the City allow paving to be delayed for approximately 9
months to allow settlement of subarade on this site? Soil report recommends delay in paving
because of concern with existing fi11 and clay soils.
17. This item will be covered by an amendment to the plan and included on the final drawings.
18. This item will be covered by an amendment to the plan,
Permanent Erosion Control Plan
19. This item will be covered by an amendment to the plan.
20. This item will be covered by an amendment to the plan and included on the final drawings.
21. This item will be covered by an amendment to the plan and included on the final drawings.
3
Sanitary Sewer Plan and Profile Sheet 4 of
1. change will be made on final drawings.
2. Information will be provided in the final specifications,
3. The City's standard detail will be included on the final drawings.
Storm Sewer Plan and Profile - Sheet 5 of 7
In further discussions with Bonestroo three options have been identified for upgrading the
storm sewer. They are:
A. Remove and replace.
B. Place a distribution slab directly over existing pipe.
C. Fill existing pipe with flowable grout and install new pipe over existing pipe.
We are still considering the options but are leaning toward the latter option of building over top
the existing pipe. We will consider leaving this pipe open until new pipe line is constructed.
Filling of existing pipe would follow construction of new line, one section of the existing pipe
may need to be demolished to install the new manhole.
2. The pond outlet structure is accessible by the maintenance bench,
3. change will be made on final drawings.
4, change will be made on final drawings.
All corrections or clarifications will be made on the final drawings to be issued next week. If the
comments or responses herein do not satisfy the City please contact us as soon as possible so we
can work out a satisfactory solution.
If you have any questions please feel free to contact me at 551 .492.2075.
Sincerely,
STEVENS ENGINEERS, INC.
Scott A. Ward, P. E.
C; Jeff Hause w J.G. Hause Construction
Kevin Grube - Grube Architects
Dennis Postler - Bonestroo & Associates
Enclosure
Mr. Eric Johnson, Administrator
City of Oak Park Heights
14168 Oak Park Boulevard
P.O. Box 2007
Oak Park freights, MIS' 55082 -2007
Re; Pox Hollow P,U.D
Grading Plait and Utilities Review
BRA Tile No, 55 -04 -000
Dear Eric,
We have reviewed the grading, ponding, erosion control and utility plans for the proposed Fox
Hollow development as submitted by Stevens Engineering and have the following comments
and /or recommendations for your consideration:
Site out and Utility Plan- Sheet 2 of 7
L Is the flow of traffic around the island located in the northwest corner of the parking lot
one way or two way
In the northwest corner of the Parking lot there are several stalls that are only 15.3',. Are
these stalls for compact cars only?
3. The handicapped stalls require accessible aisles. Any van accessible parking spots need
to be posted as such.
4. The handicapped space that is located in a parallel parking space should be a total of 13
Feet wide.
5t Where are the locations of t the curb ramps?
6. The handicapped parking sign and the pavement narking for the east handicapped spot
is not shown on the same parking stall.
7. What type of curb and gutter is being installed?
& There shall be a minimum of 5 feet of separation between any building /wall and the back
of curb,
2335 West Highway 36 n St. Paul, MN 55713 w 651- 636 -4600 a Fax. 657 - 636 -1311
Bonestroo Rosene Anderfilt and Associates. InC. Is an Aff €rmative Action /Equal Opportunity Emptoyer
Bonestroo
I
and f niplayee Owned
Rosene
PrIncipals. Otto G Bonestroo, P8 * Marvin E Sorvaki RE * Glenn R Crank RE 1- Roger[ G Schumcht RE
Jerry A Bourdon. RE a Mark A Hanson PE
Anderfik&
Senior Consultants: Robert W Rosene PE n Joseph C Anderlik RE Rjoard E Turner RE s Susan M l"berlin. C PA
Associate Principals: Keith A Gordon RE Q Robert R Pfeffer €e PC Richato W Foster. € E K David 0 Losk[ata, RE d
Associates
Michael T Rautmann PE » Ted K Fit:ld, PE • Kenneth P Anderson RE • Mark R Rolfs PC- a David A fortes #roo &4B A n
Sidney P WiII arnson. PE L S , Agnes M. Ring, M O.A # Allan Rick 5 ehmic2t, VE * Thomim w Peterson, RE -
En inners & Architects
.games R Matand RE h Miles ff Jensen RE • f_ Phillip Gravel Ill RE n Daniel i Edgerton, PE ., Ismael Martinez PE
Thomas A 5yfkn. €?E Sheldon J Johnson • Dalq A Grave RE ^ Thomas A Rousbar PE o Robert .1 Devery RE
Offices: St Paul St Cloud Rochester and WiilMar. MN „ Milwaukee ail - Chicago IL
Websfte* www bonestroo cram
August 17, 2004
Mr. Eric Johnson, Administrator
City of Oak Park Heights
14168 Oak Park Boulevard
P.O. Box 2007
Oak Park freights, MIS' 55082 -2007
Re; Pox Hollow P,U.D
Grading Plait and Utilities Review
BRA Tile No, 55 -04 -000
Dear Eric,
We have reviewed the grading, ponding, erosion control and utility plans for the proposed Fox
Hollow development as submitted by Stevens Engineering and have the following comments
and /or recommendations for your consideration:
Site out and Utility Plan- Sheet 2 of 7
L Is the flow of traffic around the island located in the northwest corner of the parking lot
one way or two way
In the northwest corner of the Parking lot there are several stalls that are only 15.3',. Are
these stalls for compact cars only?
3. The handicapped stalls require accessible aisles. Any van accessible parking spots need
to be posted as such.
4. The handicapped space that is located in a parallel parking space should be a total of 13
Feet wide.
5t Where are the locations of t the curb ramps?
6. The handicapped parking sign and the pavement narking for the east handicapped spot
is not shown on the same parking stall.
7. What type of curb and gutter is being installed?
& There shall be a minimum of 5 feet of separation between any building /wall and the back
of curb,
2335 West Highway 36 n St. Paul, MN 55713 w 651- 636 -4600 a Fax. 657 - 636 -1311
9. Any curb box located in pavement shall have a cover. The recommended cover is a Ford
Type A single locking lid.
10. The curb box for the east office building is drawn on the property line rather than the
water service.
11. How is the connection being made to the existing main along 60 Street? 1s it a wet tap?
12. Approval must be obtained from the Building Inspector and Fire Department that each
building has the appropriately sized water main/service for fire protection.
13. All water main shall have 7.5 feet of cover.
14,, There is a description of a storm surer pipe being placed flush with the face of the
retaining wall. The detail for this is not yet: shown on the detail sheets.
Gradin ,, Drainage and Erosion Control- Sheet 3 of 7
1 The slopes on Xcel Energy property are labeled as 4:1; however, if these are 2 foot
contours, as shown, then the slopes actually scale as 2;1. In addition, the 6:1 slopes in
this area are actually 3:1.
20 Slopes shall not exceed 3:1 in any areas that are to be mowed and/or within any drainage
and utility easement.
3. The design and construction of the proposed retaining galls are the responsibility of the
developer's engineer, Detailed design drawings and calculations for these - galls shall be
submitted to the City for review and approval prior to construction.
4� U n d er existing conditions it appears that the overflow route for the existing pond is to the
east, This direction should be m aintained as the emergency overflow route for the
proposed pond (tire proposed p ond's EOF appears to be to the south/southeast).
5. The storn water pond is required to have a 10;1 maintenance bench.
6, On Note 2 the City of Hugo should be changed to Oak Park sleights.
Storm water Pollution. Prevention Plan and Erosion Control Plans.
7. Each set of plans should include both a temporary and a permanent erosion control plan
as required by the NPDES permit from the Minnesota Pollution Control Agency. This
requirement is for any land disturbing activity greater than one acre, which includes this
protect.
Limits oft learing and grading should be indicated on the erosion and sediment control
plans, both temporary and permanent.
9. Total impervious surface from proposed building, proposed parking area, and access
drive should be provided..
10, Inspection reports should be routed to the City of Oak Park Heights weekly, or after each
.S inch rain event, whichever is more frequent.
11.. Details for the following should be included in the plan set and the SVVPPP:
an Stockpile protection
b. Inlet protection
Temporary Erosion Control Plan:
12. All silt fence locations should be more clearly defined on provided plans. In addition, we
recommend silt fencing extend along the entire south and cast portions of the site,
13n Machine type sliced. silt Fence (MnDOT 3886 B-2) should be the only acceptable
practice. Also, detailed drawings should be provided in revised plan set, including metal
fence pasts if over winter construction activity,
14. Detailed drawings on all construction entrances should include a geotextile liner beneath
the rock for proper performance standards
15. Inlet protection devices shall be used on all catch basins, and curb and gutter opem*ngs.
Details and locations should be provided.
16. Provide phased construction schedule. This is designed and intended to limit the amount
of exposed land area at one timer
17. Define and locate on plan any temporary vegetation protection to be installed prior to
commencing land grading activity.
18. If pond is to be used for temporary site dewaterirrg purposes, silt fence should be located
around the pond to control on site drainage.
Permanent Erosion Control Plan t
19, All slopes that are 4,-1 or steeper should be specified as stabilized with erosion control
blanket within 7 days of final grade and should be clearly indicated on permanent erosion
control plan.
20, Seeding and mulching of all open soil areas is critical to staging construction. No open
soil shall be open longer than 14 or 21 days after final grading is complete, this should be
indicated along with areas for revegetation on plan set. This time of exposure is
dependent upon slope gradient..
21, Provide detail for controlled overflow of' pond, both for temporary and permanent storm
grater storage,
Sanitary Sewer Plan. and Profile- Sheet 4 of 7
1 To provide capacity during the interim and ultimate conditions the minimum required
slope of the proposed 12" PVC sanitary sewer is 1.0 %,.
2. Information is required on the height and type of material for the risers,
3,. The detail for the outside drop is not shown on the detail sheets.
Storm Sewer Plan and profile Sheet 5 of 7
1 n The plans call for placing a new 36" RCP storm sewer over the existing storm sewer.
If' this is the chosen design it is recommended that the existing storm sewer be
completely removed - however, removal and replacement of the 36" storm surer` is
very costly. ,mother option (and possibly a more economical one) is to keep the
existing storm surer in use and counter the additional fill by placing a concrete
bridge directly over the top of the existing 36" storm suer.
2. It is recommended that the outlet structure for the pond be located where it is easily
accessible for maintenance.
3. The outlet structure for the pond has 2 -15" orifices located inside the structure. It is
not clear if the design is to control rate during low flow events or to act as a skimmer.
If this is for rate control an orifice should be placed at the normal water level, For
skimming, it is recommend that a clearance of V be maintained between the NWL
and the top of the skiniming structure.
4. It appears that the pond outlet pipe may be in conflict with the footings of the
retaining wall. Rather than crossing the retaining wall at approximately a 45' angle, it
is recommended that the pipe cross the retaining Mall at right: angles.
If you have any questions or require additional information, please contact me at (651) 604 -4788
or Dennis Postler (14 (651) 604 -4815.
Sincerely,
Karen S. Frierson, P.E.
cc: Tom Ozzello, Public Works Director
Jinn Butler, Building Official
Scott Richards, City Planner
Mark vierling, City Attorney
Kathy ' idin, City Arhorist
Todd A. Erickson — Folz, Freeman, Erickson, 111c,
P, DDH, File — Bonestroo & Associates
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