Water pressure may have contributed to Wanapum Dam fracture
Cranes and equipment stand in place at the drilling site at Wanapum Dam Tuesday, where a special drilling project is being done to discover the cause of a spillway crack found Feb. 27.
BEVERLY — Engineers and analysts believe water pressure on the Wanapum Dam spillway may have contributed to a 65-foot crack in the structure.
Seismic activity, foundation settlement or uplift, activities at U.S. Army’s Yakima Training Center and spillway gate operation are not causes, according to a district statement released Wednesday. A final answer on the crack's cause isn't expected until June, according to story in today's Columbia Basin Herald.
For more information about this evolving story, read today and Thursday’s editions of the Columbia Basin Herald.
— Staff report
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