Joyce Flinn, with Iowa’s emergency management division, says sonar soundings will help clue in engineering crews about how much work they’ll be facing after weeks of erosion.
Flinn says they’ll be looking at bases of towers or bridge abutments. Officials say the gusher of water being released into the Missouri River from Gavins Point Dam will be gradually reduced beginning August 17th.
Flinn says the U.S. Geological Survey is assisting with the sonar soundings and it will help them be prepared to start repairs once the water level drops and they can access the structures.
She says they are working to identify some critical infrastructure and they will work with the USGS and other federal partners and the counties to do the soundings while the water is gradually coming down.
Flinn says the water releases will drop from 150,000 cubic-feet-per-second (CFPS) now to 90,000 C-F-P-S by the end of August. The current flow rate is about a million gallons per second.