Earthquake-proofing improvements will be made at Steinaker Dam near Vernal beginning this fall.
The U.S. Bureau of Reclamation is currently finishing data gathering for the project and officials hope to have a construction contract awarded later this summer. Construction will occur during the fall and winter with completion before next spring's runoff.The plan includes treating foundation materials as well as installing the berm at the foundation toe. About 20 bore holes will be drilled this spring, providing data to complete planning work.
A 1980 geologic study indicates portions of the 30-year-old dam's foundation could liquefy during a severe earthquake. The nearest major faults are 25 to 30 miles away and are not considered major threats. The improvements are intended to protect against randomly occurring quakes, considered highly unlikely, at the dam site.