US Bridges

Timm Road over Sweeney Creek

Fair

Solano County, California · 1.5 MI W/O I-505 · Structure no. 23C0122

Built
1981
44 years old
Condition
Fair
inspected November 2023
Type
Slab
Concrete Continuous
Length
93 ft
3 main spans
Daily traffic
2,512
2004 count
Owner
County
County Highway Agency

About this bridge

Timm Road over Sweeney Creek is a concrete continuous slab carrying Timm Road over Sweeney Creek in Solano County, California. It was built in 1981, so it is 44 years old, younger 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 2,512 vehicles a day, roughly 4% of them trucks, projected to reach 1,587 by 2045. The structure is 93 ft (28.3 m) long and 30 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesTimm Road
CrossesSweeney Creek
Location1.5 MI W/O I-505
RouteCounty Highway 0
CountySolano County
StateCalifornia
Coordinates38.43756, -121.96942
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 alignment7: Better than present minimum criteria
Operating rating96.1 US tons
Inventory rating57.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length93 ft (28.3 m)
Longest span36 ft (11 m)
Deck width30 ft (9.1 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,512 (2004)
Projected traffic1,587 by 2045
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Timm Road over Sweeney Creek built?

It was built in 1981, making it 44 years old in 2025.

What condition is Timm Road over Sweeney 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 November 2023.

How much traffic does Timm Road over Sweeney Creek carry?

About 2,512 vehicles per day (2004 count), of which roughly 4% are trucks.

How long is Timm Road over Sweeney Creek?

The structure is 93 ft (28.3 m) long with a longest span of 36 ft (11 m) and a deck 30 ft wide.

Who owns Timm Road over Sweeney Creek?

It is owned by the County Highway Agency.