05-0458 Pump Skid Approval
City of Yelm
Community Development Department
105 Yelm Avenue West
P.O. Box 479
Yelm, WA 98597
July 23, 2008
Clint Pierpoint
KPFF Consulting Engineers
4200 Sixth Avenue SE
Lacey, WA 98503
Dear Clint:
Attached please find the signed construction plans for the Forrester Heights booster pump station. The plans are approved for construction of the skid with the following conditions:
1. The City would prefer that the system be controlled through an Allen-Bradley control panel in order to maintain consistency throughout the City. Please contact Grund-Fos, the skid
manufacturer, to determine if they can provide an Allen-Bradley controller as part of their package booster station.
2. Regardless of the control panel provided by the skid manufacturer, a detailed control and instrumentation plan and control logic must be provided prior to City acceptance of the station.
Please see comment 21 from the Parametrix letter dated March 26, 2008, a copy of which is attached for your records. Specifically, the latest submission of the control logic plans
do not address the operation of the smaller pump in the skid or the default action in case of a failure of the variable frequency drives.
If you have any questions regarding this approval, please don’t hesitate to contact me at (360) 458-8408.
Sincerely,
Grant Beck, Director
Community Development Department