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OHA Drinking Water Services Contact Report Details
PWS ID:	OR41 00792
PWS Name:	SCAPPOOSE, CITY OF

Who Was Contacted and Phone:	Joe Lewis (971) 246-9004
Contact Date:	09/09/2009
Contacted By:	HENRY, ROBERT (DWP)
Contact Method/Location:	Field

Assistance Type:	CIRCUIT RIDER ASSISTANCE
Reasons:	N/A N/A

Details:	SUMMARY: Operational Difficulties at Water Treatment Plant DETAILS: The City of Scappoose owns and operates a Surface Water system, which supplies approximately 5,800 people through 2,000 connections. The City treats water from multiple creek sources. In addition, water is provided through 2 wells. HBH was contacted by the City to provide assistance with a contact tracer study. When discussing the study, it was determined that a hydraulic condition at the surface water treatment plant would potentially interfere with the testing. Further investigation determined that the hydraulic condition interfered with the finish water flow meter readings. I visited site again to verify plan measurements and clear up inconsistencies. I performed hydraulic modeling on WTP finish water piping. It was discovered that a severe hydraulic jump downstream of the flow meter and leaking filter control valves are causing problems with the meter hydraulics. Other problems may exist. ACTION NEEDED: Follow up with the City regarding possible improvements to remedy flow meter problem.