 Repair of the runners would prove to be difficult because the runner blades are thin, making them difficult to weld, and the spacing between the blades is small which gives limited access to the damaged area.The U.S. Army Corps of Engineers realized that a state-of-the-art runner design was required and devised a turbine-generator rehabilitation program.Due to the technical challenges associated with the program, the Corps chose a best value procurement method for this project.