Wanapum Dam

Wanapum Dam
12:17 am
Fri March 7, 2014

Exposed Shoreline Behind Damaged Wanapum Dam Closed To Public

Grant County engineers have lowered water behind the Wanapum Dam to ease pressure on the crack in part of its spillway.
Anna King Northwest News Network

Originally published on Thu March 6, 2014 5:46 pm

Officials in Grant County, Wash., are asking the public to stay away from the shoreline behind the damaged Wanapum Dam.

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Dam Fix
3:59 pm
Wed March 5, 2014

Outside Experts Weigh In On Columbia River’s Damaged Wanapum Dam

File image
Tom Banse

Teams of engineers are scrambling to figure out what’s gone wrong with the Wanapum Dam on the Columbia River near Vantage.

The dam’s problem is on a structure called the ogee, a big piece of concrete anchored to the bottom of the river. It’s like a river speed bump; it has a big curve on the top where the water flows over it. When the spillway gate is lifted, the water flows through from the upriver side of the dam to the downriver side over this ogee.

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Dam Fix
2:58 pm
Tue March 4, 2014

Columbia River Drawdown Continues To Take Pressure Off Wanapum Dam

This undated photo provided by Grant County (Wash.) public utility, the Wanapum Dam on the Columbia River, Wash., is shown.
AP Photo/Grant County Public Utility

Water behind the Wanapum Dam near Vantage is being drawn down 26 feet to relieve pressure on the big crack in the structure. Officials say dozens of engineers are on site, and more around the country are studying the problem.

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