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Sediment Woes For Port Angeles Water Treatment Facility Put Elwha Dam Removal On Hold

April 22, 2013 | KUOW
CONTRIBUTED BY:
Ashley Ahearn


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  • The $79 million facility was designed specifically to deal with the sediment released from above the dams during removal. credit: Ashley Ahearn
The $79 million facility was designed specifically to deal with the sediment released from above the dams during removal. | credit: Ashley Ahearn | rollover image for more

Removal of the two dams on the Elwha River has been temporarily halted because massive amounts of sediment released from above the dams have clogged a nearby city’s water treatment facilities.

One of the two dams on the Elwha has been completely removed. That’s released about 20 percent of the 34 million cubic yards of sediment stored up behind both dams.

But the muck, silt and debris has caused some major problems for one of Port Angeles’ water treatment facilities.

It’s been clogging the intake system at the Elwha Water Facility. The facility provides drinking water to Port Angeles as well as two nearby fish hatcheries and the nearby paper producer.

The city has been using a back up system that has been in operation since before dam removal began, but experts say it shouldn’t continue to be used in periods of high sediment levels in the river.

“As much as we’re extremely eager to see dam removal complete and the rest of the restoration begin, right now our primary focus is on making sure that the downstream water users have the water that they need,” said Barb Maynes, a spokeswoman for the Olympic National Park.

The Park Service has signed a 1.4 million dollar contract to fix the problems at the facility but for right now removal of the remaining dam on the river has been put on hold.

The Park Service declined to comment on whether it will take legal action against the company that designed the water treatment facility but acknowledged that that was under consideration.

The brand new $79 million dollar facility was put in specifically to deal with the large flush of sediment predicted to come during dam removal on the Elwha.

© 2013 KUOW
Elwha Dam Removal Port Angeles sediment
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