An audit of the Bureau of Reclamation's (BoR) final Environmental Impact Statement (EIS) on the operations of the Glen Canyon Dam (GCD). This report discusses: whether BoR's determination of the impact of various dam-operating alternatives on selected resources was reasonable; and what, if any, concerns still exist on the part of key interested parties about the final EIS. Since the GCD, located in Page, AZ, was completed by the BoR in 1963, it has been used to generate power during periods of high demand. The fluctuation releases of water have caused concerns about the detrimental effects such flows have in the Grand Canyon.