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The original item was published from 12/5/2016 9:29:09 AM to 1/7/2017 12:00:01 AM.

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Posted on: December 5, 2016

[ARCHIVED] Wastewater Plant Project Complete

The replacement of a device that removes items that might interfere with the processing of sewage at the Brookings Wastewater Treatment Plant (WWTP) was completed this week, City Manager Gary Milliman reported.

Called a “bar screen” the device removes rock, rags, containers, syringes and other items that could damage the internal mechanisms at the WWTP.

“The kinds of things showing up at the bar screen is kind of amazing,” Milliman said.  “Things you would never think would travel through a sewer pipe.  I’ve even seen beach balls, bricks and bicycle helmets.”

In late 2013 one of two bar screens at the WWTP began showing signs that it was worn beyond cost effective repair. A suitable replacement unit was identified and the lengthy process of developing project drawings, obtaining funds and initiating the competitive bid process began.

Two bids were received and the low bidder, Pacific Excavation, was award a $244,500 contract to perform the work.

“The City’s WWTP, which also serves the Harbor Sanitary District, is operated in strict compliance with a site specific National Pollution Discharge Elimination System permit (NPDES).  The NPDES permit is administrated by the State of Oregon, Department of Environmental Quality (DEQ),” Milliman said.  “This work was necessary to assure compliance with state and federal permit requirements, and to protect the plant from costly internal damage.”

Due to the abrasive and corrosive qualities of waste water many components in the WWTP can wear out quickly.  The existing bar screens has been in operation 24 hours a day since 1990.  Additional corrosion occurs because the WWTP is located beside the Pacific Ocean.  

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