Historic Flood Photos
Valley Lows
Valleys are low lying, flood-prone areas between hills and mountains—and Tri-Valley refers to our location nestled among three valleys:
- Amador Valley
- Livermore Valley
- San Ramon Valley
As such, the Tri-Valley has been subject to a number of floods over the years. Take a look back at our history of flooding below.
1955
Christmas Eve flooding in 1955—two years before Zone 7 was created in part to provide flood protection—left much of northern Pleasanton, in the vicinity of where Hacienda Business Park now stands, under water.
1990’s
Throughout the 90s a series of rainy years caused flooding in Tri-Valley.
Learn more about how we are strategically managing our flood channels to help protect our homes and businesses in the future on our Flood Protection System page.