County administrators released the 300-page report after more than a year of preparation. The update to a less comprehensive study released in 2000 provides an overview casino and other tribal development impacts. Five casinos and other Indian projects have opened since that first report, transforming the county into the nation's fastest-growing region for Indian gaming.

A $125 million Harrah's hotel-casino is opening today on the Rincon reservation and four of the county's nine casinos are expanding.

The draft is available to the public through Sept. 27, after which a final version will be presented to county supervisors. Tribes criticized the 2000 report as unfair, prompting the report's authors to provide detailed information about each of the county's 18 reservations.