PWA provides many of the basic services that affect the daily lives of everyone who lives, works, visits and commutes within the unincorporated areas of Alameda County as well as the eight defined flood zones that provide flood protection for most of its cities. 

PWA has five skilled sections dedicated to making Alameda County a safe place to live through infrastructure management.


Maintains 471 center line miles of roadway and county right of ways. Major tasks include  pavement rehabilitationguardrail repairfence repairpothole patchingshoulder repairstorm damage repair and cleanupweed controltree trimmingstreet sweepingdebris removalchip sealpavement repairscrack fillingculvert cleaning-repair-replacecommunity service requests, support for the Capital Improvement Program, and 24/7 emergency response.


Provides emergency service and routine maintenance of traffic signals and streetlights in the unincorporated areas of Castro Valley, San Lorenzo, Livermore, and Pleasanton. Maintenance operations are performed on a regular basis to ensure all equipment is operating as intended.  Maintenance activities include replacing bulbs and lamps on a scheduled basis and repairing or replacing damage caused by accidents or vandalism. This section also provides inspection services on new roadway construction in Alameda County. 

This section also maintains, repairs, and replaces approximately 45,000 road signs within the unincorporated areas of Alameda County and installs new signs as directed by the County Traffic Engineer, paints traffic lines, cross walks, and curbs, reviews signs and performs accident repairs and graffiti removal; and replaces missing or broken pavement markers and delineators.


Maintains 550 miles of flood control creeks, channels, and culverts in an effort to maximize facility capacity and protect properties from flooding. Major tasks include; levee repair, silt basin maintenance, weed control, tide gate maintenance, concrete structure repair, vegetation removal, de-silting, fence repairs and emergency response. 


Maintains and operates 24 storm water lift stations (pump stations) located in the western, low-laying flood plain areas of the County. Two of these stations protect roadway underpasses – one in San Lorenzo, and the other on Pleasanton Sunol Road. All 24 pump stations are maintained and operated year round to direct collected storm water, ground water, irrigation drainage, and transient street runoff to nearby flood control channels. A Supervisory Control and Data Acquisition (SCADA) system has been in operation since 2006 for remote operation and monitoring of the pump stations.


Operates and maintains six drawbridges over the Oakland-Alameda Estuary. Four of these bridges are for vehicle traffic; one is for trains; and one is exclusively for bicycles and pedestrians. All of the bridges except the railroad bridge are known as bascule bridges. The railroad bridge is a vertical lift bridge. Today, the four vehicle bridges handle in excess of 44 million vehicle trips annually and serve as transportation corridors for most of the commercial traffic between the cities of Oakland, Alameda and Interstate 880. They also permit passage of over 2,300 private and commercial tugs, barges, sailboats and other watercraft. 

Back To The Top