Sallisaw Watershed Rehabilitation Project


Stillwell, Oklahoma
Client: C. Watts & Sons
Owner: Natural Resources Conservation Service (NRCS)

Sallisaw Creek is a 40-mile long tributary of the Arkansas River in eastern Oklahoma. The Sallisaw Creek Watershed Dam No. 18M is one of 34 dams in the watershed, and was classified as high-hazard due to a 2006 study that showed homes, churches, and a water treatment and pumping facility that would be inundated in the event of a dam failure. The required Rehabilitation included raising the dam's height by 3.4 feet and replacing the existing spillways.

Fall Line performed the RCC mix design program for the 18,000 cubic yard RCC spillway project utilizing various cement, fly ash and aggregate blends. During construction of the new RCC Dam Fall Line mobilized to the site and built an on-site laboratory that was utilized for aggregates testing, curing, and testing of RCC and convention concrete. Fall Line also had facilities to perform accelerated concrete curing of RCC Test cylinders. Technicians utilized nuclear density gauges for compaction control.