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OHA Drinking Water Services Contact Report Details
PWS ID:	OR41 00394
PWS Name:	IDANHA CITY WATER

Who Was Contacted and Phone:	Greg Benthin (503) 897-3313
Contact Date:	12/18/2009
Contacted By:	HENRY, ROBERT (DWP)
Contact Method/Location:	Field

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

Details:	SUMMARY: Upflow Clarifier Upset DETAILS: The City of Idanha has a packaged water treatment plant consisting of a rapid sand filter preceded by upflow clarifier. A contractor had been working upstream of the intake on Mudpuppy Creek and the work resulted in a large amount of sediment being directed into the intake (and subsequently into the water treatment plant). HBH was contacted by Mr Benthin for advice as to the likelihood that the upflow clarifier media was damaged by the rapid influx of sediment. I visited the treatment plant to physically inspect the clarifier media and reviewed filter performance before and after the event. I recommended that the operator contact the local treatment plant representative who had recently installed the clarifier media. ACTION NEEDED: None needed at this time.