The dam has a rated capacity of 1,185 megawatts and annually generates over 4 million megawatt-hours.

The license extension was conditioned upon programs to achieve the following goals:[4] On February 27, 2014, a 2-inch (5 cm) wide crack was discovered by inspection divers on one of the 65 feet (20 m) tall concrete monoliths that make up the spillway of the dam.

A spokesman for the Grant County PUD indicated that the level of the water was to be lowered by 26 feet (8 m) over a period of days to "reduce the pressure on the spillway while inspectors investigate".

After an 11-week inspection, the primary reason for the crack was determined to be a mathematical error during the pre-construction design of the dam.

[5] The $61 million fix, used steel cabling and rods to stitch the dam to the bedrock underneath.