8327 Civ Eng No 1 102802October 30, 2002
Robert Tauscher
JWM & A Inc.
1700 Cooper Point Rd SE #B2
Olympia, Washington 98502
RE: Civil Engineering Review No. 1
Central Reddi-Mix Grading and Drainage Plans
City of Yelm Project No. CIV-02-8327-YL
Dear Mr. Tauscher:
I have reviewed the plans submitted on September 26, 2002. The following are comments from the above referenced plans and need to be addressed on the future submittal. These comments
are general in nature and will need to be addressed before resubmitting the plans for final approval.
It appears that a significant amount of gravel runoff will be sheet flowing into the infiltration pond without water quality treatment. This area is in a location with high use vehicle
traffic and equipment operations. This area needs to be treated before entering the infiltration facility.
The plans need to have elevations, inverts and construction notes for construction of the ditch section and conveyance pipes.
Many parts of the existing concrete currently sheet flow into the surrounding gravel areas. How will this surface water be redirected to the reuse holding pond?
When will Phase 2 of these improvements be constructed?
What will the construction sequence be for the proposed improvements? Please add a construction sequence to the plans.
The storm drainage manual requires soil test pits to be excavated in the storm drainage facilities. I was unable to locate the test pits and soils logs in the storm drainage report.
Please review and revise your engineering drawings. When you resubmit your package, please send 4 revised sets and two drainage reports. 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
Cc: John Pearch, Dept of Ecology