US Bridges

Brown Road over Ulatis Creek

Fair

Solano County, California · 1.5 MI E of RTE 113 · Structure no. 23C0186

Built
1963
62 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
203 ft
7 main spans
Daily traffic
81
2004 count
Owner
County
County Highway Agency

About this bridge

Brown Road over Ulatis Creek is a concrete continuous slab carrying Brown Road over Ulatis Creek in Solano County, California. It was built in 1963, so it is 62 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 81 vehicles a day, projected to reach 104 by 2041. The structure is 203 ft (62 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesBrown Road
CrossesUlatis Creek
Location1.5 MI E of RTE 113
RouteCounty Highway 0
CountySolano County
StateCalifornia
Coordinates38.30696, -121.79451
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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.8 US tons
Inventory rating40.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length203 ft (62 m)
Longest span29 ft (8.8 m)
Deck width27 ft (8.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic81 (2004)
Projected traffic104 by 2041
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 Brown Road over Ulatis Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is Brown Road over Ulatis 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 Brown Road over Ulatis Creek carry?

About 81 vehicles per day (2004 count).

How long is Brown Road over Ulatis Creek?

The structure is 203 ft (62 m) long with a longest span of 29 ft (8.8 m) and a deck 27 ft wide.

Who owns Brown Road over Ulatis Creek?

It is owned by the County Highway Agency.