US Bridges

Byrnes RD over Horse Creek

Fair

Solano County, California · 1.5 MI S Kilkenny RD · Structure no. 23C0064

Built
1977
48 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete Continuous
Length
66 ft
3 main spans
Daily traffic
655
2011 count
Owner
County
County Highway Agency

About this bridge

Byrnes RD over Horse Creek is a concrete continuous slab carrying Byrnes RD over Horse Creek in Solano County, California. It was built in 1977, so it is 48 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 655 vehicles a day, roughly 2% of them trucks, projected to reach 886 by 2046. The structure is 66 ft (20.1 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesByrnes RD
CrossesHorse Creek
Location1.5 MI S Kilkenny RD
RouteCounty Highway 0
CountySolano County
StateCalifornia
Coordinates38.37334, -121.90591
Functional classRural Minor Collector

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 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 geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.4 US tons
Inventory rating27.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length66 ft (20.1 m)
Longest span21 ft (6.4 m)
Deck width32 ft (9.7 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic655 (2011)
Projected traffic886 by 2046
Trucks2%
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 Byrnes RD over Horse Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is Byrnes RD over Horse 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 October 2024.

How much traffic does Byrnes RD over Horse Creek carry?

About 655 vehicles per day (2011 count), of which roughly 2% are trucks.

How long is Byrnes RD over Horse Creek?

The structure is 66 ft (20.1 m) long with a longest span of 21 ft (6.4 m) and a deck 32 ft wide.

Who owns Byrnes RD over Horse Creek?

It is owned by the County Highway Agency.