8265-082401-SPILLER
August 27, 2001
Mr. Dave Spiller
Hatton Godat Pantier
2708 Westmoor Court
Olympia, WA 98502
RE: Longmire Meadows – File No. SUB-00-8265-YL
Civil Engineering Plan Review No. 3 (Storm Drainage)
Dear Mr. Spiller:
The following is a list of revisions required to approve the remainder of the storm drainage plans. I have listed the review comments in general groups with regards to the parts of
the storm drainage system.
Coates St. to Bioswale to Infiltration Pond
The elevations do not match on all sheets. Revise elevations and clearly label what the elevations reflect.
The bioswale is labeled as 100 ft. in length. The actual length of the swale is 90 ft. Revise to show bioswale 100 ft. in length.
Show proposed grading over 8” storm drainage pipe in the plan and profile. Two feet of cover is required unless ductile iron pipe is used. At least 1 ft. of cover is required with
ductile iron.
Solberg St. to Bioswale to Infiltration Pond
Show proposed grading over 8” storm drainage pipe in the plan and profile. Two feet of cover is required unless ductile iron pipe is used. At least 1 ft. of cover is required with
ductile iron.
The elevations do not match on all sheets. Revise elevations and clearly label what the elevations reflect.
Vantrump St. to Bioswale to Infiltration Pond
Catchbasin no. 4A is not profiled. Add this catchbasin and its information to the profile.
Show proposed grading over 8” storm drainage pipe in the plan and profile. Two feet of cover is required unless ductile iron pipe is used. At least 1 ft. of cover is required with
ductile iron.
The pipe outflow elevation does not match the pond section. Please revise to match elevations.
Longmire St. to Bioswale to Infiltration Pond:
Show proposed grading over 8” storm drainage pipe in the plan and profile. Two feet of cover is required unless ductile iron pipe is used. At least 1 ft. of cover is required with
ductile iron.
The pipe outflow elevation does not match the pond section. Please revise to match elevations.
Catchbasin no. 7 needs a inlet grate installed.
General Information:
The local access commercial roadway section in not correct. Please revise the asphalt thickness on all sheets.
Add bioswale seeding information to sheet 12. Specify seed type and mixture ratio.
Pond sections do not accurately reflect the plan view. Revise the profiles to be consistent with the plan view.
Call out riprap pads at all outflows. Min size should be 6’ wide x 12’ long x 1’ thick.
All storm drainage pipes shall be installed with toning wire. The wire shall terminate in all catchbasins and at pipe ends.
The storm drainage easements located between the lots are not labeled correctly on all sheets. Please show the 2 ft. offset.
Please revise and resubmit this information for additional review. If you have any questions or comments please call me at (360) 458-8438 and I will be happy to further assist you.
Respectfully,
City of Yelm Community Development
Jim Gibson
Development Review Engineer
Enc:
Cc: Bob Bussey
Carl Teitge
Shelly Badger
Tim Peterson
Cathie Carlson