US Bridges

Salem Road over Old Alamo Creek

Fair

Solano County, California · 1.0 MI S Brown RD · Structure no. 23C0187

Built
1966
59 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
67 ft
3 main spans
Daily traffic
44
2004 count
Owner
County
County Highway Agency

About this bridge

Salem Road over Old Alamo Creek is a concrete continuous slab carrying Salem Road over Old Alamo Creek in Solano County, California. It was built in 1966, so it is 59 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 5 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 44 vehicles a day, projected to reach 102 by 2043. The structure is 67 ft (20.4 m) long and 29 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSalem Road
CrossesOld Alamo Creek
Location1.0 MI S Brown RD
RouteCounty Highway 0
CountySolano County
StateCalifornia
Coordinates38.29088, -121.79594
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.3 US tons
Inventory rating44.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length67 ft (20.4 m)
Longest span26 ft (7.9 m)
Deck width29 ft (8.8 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44 (2004)
Projected traffic102 by 2043
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Salem Road over Old Alamo Creek built?

It was built in 1966, making it 59 years old in 2025.

What condition is Salem Road over Old Alamo 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 March 2023.

How much traffic does Salem Road over Old Alamo Creek carry?

About 44 vehicles per day (2004 count).

How long is Salem Road over Old Alamo Creek?

The structure is 67 ft (20.4 m) long with a longest span of 26 ft (7.9 m) and a deck 29 ft wide.

Who owns Salem Road over Old Alamo Creek?

It is owned by the County Highway Agency.