An 8-year project to modify the dam and facilities was completed in 1993. The State of Wyoming contributed about 40 percent of the cost of the modification, making this the first state/federal cost-sharing agreements for water project construction in the nation.

RAISING THE DAM
The project involved raising the crest of the dam 25ft to create an additional 260,000 acre-feet of reservoir storage capacity.

ENLARGING AND GATING THE SPILLWAY
The dam's spillway, which runs through the mountain under the visitor center, was enlarged, and radial arm gates were installed to allow for controlled spilling.

BUILDING DUST DIKES
Two dust-abatement dikes and one protective dike were constructed at locations around the reservoir.

BUILDING A VISITOR CENTER
The visitor center was completed in 1993. Half the cost of construction was borne by local interests. A non-profit corporation was formed to raise the local share of construction costs and to maintain the visitor center.

ADDING POWER GENERATING CAPACITY
An additional25.5 megawatts of power generating capacity was added to the project. This included a new 18-megawatt Buffalo Bill Power Plant.