Memo to Stephanie re drainage (2)
4wbF T`p., M E M O R A N D UM
City of Yelm
Community Development Department
WASHINGTON
To: Stephanie Conners, Project Manager
From: Grant Beck, Director of Community Development
Date: August 30, 2007
Subj: Stevens Street Drainage - Prairie Park
During review of the proposed Stevens Street connector between 1 st Street and West
Road, the issue had been raised as to whether it was possible to handle storm water
generated from the new road section east of the intersection of Stevens and 4t" Street
by connecting to the Prairie Park stormwater system. This section of roadway is
approximately 300 feet in length and would have a surface width of 28 feet (two travel
lanes a total of 23 feet wide and a 5 foot bike lane).
Jim Gibson, our Development Review Engineer, reviewed the final design Prairie Park
storm system along with the design calculations and determined that the system, at full
build-out of the approved Prairie Park planned development, has sufficient excess
capacity to accept the approximately 600 cubic feet of storm water generated by the
Stevens Street project with no impact to the proposed development.
C. Tim Petersen, Public Works Director
Jim Gibson, Development Review Engineer
File Number PDD-00-8246-YL