BEFORE THE DAM   A new story of the region's history emerged when archaeologists found human artifacts that were almost 10,000 years old. 

Featuring Seth Adams, Mike Moran, Marguerite Patil, Adrian Praetzellis, Malcolm Sproul. Sponsored by Save Mount Diablo, Thomas J. Long Foundation, and Contra Costa Water District. Photos by Scott Hein and Bob Walker. Music by Phil Heywood. Production by Joan Hamilton, Audible Mount Diablo.