Temescal Branch Gate

A population boom on the eastern side of the hill in Orinda and Walnut Creek drove the desire for a highway connecting Contra Costa and Alameda counties. Engineers used the natural depression of Temescal Creek's main branch to build State Route 24. The construction of the highway forced the creek underground; however, there are culverts and open grates that run along Hwy 24 where you can still see the creek.