GRDA's Competitive Rates
As a not-for-profit, cost-of-service public power utility, the GRDA is able to keep its rates competitive. In fact, GRDA's rates consistently rank in the lowest 20 percent nationwide. GRDA has achieved, and maintains, these rates through the use of abundant hydro power (often referred to as free fuel) and inexpensive fossil fuel supplies.

The Power Cost Adjustment Mechanism (PCA)
GRDA's already-low rates are often aided by the power cost adjustment (PCA), computed twice a year. Established in 1984 to help stabilize rates, PCA is a rate mechanism used to make minor adjustments to the base rates to reflect actual cost of fuel used in electrical generation. The more negative the PCA number, the more credit customers receive. When fuel costs are lower than expected, a negative adjustment to bills can be made to pass the savings to customers.