US Bridges

Appian Way over San Pablo Creek

Fair

Contra Costa County, California · At San Pablo Dam Road · Structure no. 28C0329

Built
1938
87 years old, rebuilt 1956
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
120 ft
3 main spans
Daily traffic
11,492
2014 count
Owner
County
County Highway Agency

About this bridge

Appian Way over San Pablo Creek is a steel continuous stringer/multi-beam or girder carrying Appian Way over San Pablo Creek in Contra Costa County, California. It was built in 1938 and reconstructed in 1956, so it is 87 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 11,492 vehicles a day, roughly 5% of them trucks, projected to reach 37,911 by 2044. The structure is 120 ft (36.6 m) long and 65 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesAppian Way
CrossesSan Pablo Creek
LocationAt San Pablo Dam Road
RouteCounty Highway 0
Coordinates37.96641, -122.30929
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50.4 US tons
Inventory rating30 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span39 ft (12 m)
Deck width65 ft (19.8 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,492 (2014)
Projected traffic37,911 by 2044
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Appian Way over San Pablo Creek built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1956.

What condition is Appian Way over San Pablo Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does Appian Way over San Pablo Creek carry?

About 11,492 vehicles per day (2014 count), of which roughly 5% are trucks.

How long is Appian Way over San Pablo Creek?

The structure is 120 ft (36.6 m) long with a longest span of 39 ft (12 m) and a deck 65 ft wide.

Who owns Appian Way over San Pablo Creek?

It is owned by the County Highway Agency.