US Bridges

State Route 12 over Mccoy Creek

Fair

Solano County, California · 04-SOL-012-6.28-SUIS · Structure no. 23 0017

Built
1988
37 years old, rebuilt 1996
Condition
Fair
inspected March 2024
Type
Culvert
Concrete Continuous
Length
127 ft
10 main spans
Daily traffic
36,000
2019 count
Owner
State
State Highway Agency

About this bridge

State Route 12 over Mccoy Creek is a concrete continuous culvert carrying State Route 12 over Mccoy Creek in Solano County, California. It was built in 1988 and reconstructed in 1996, so it is 37 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 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 36,000 vehicles a day, roughly 7% of them trucks, projected to reach 63,701 by 2042. The structure is 127 ft (38.7 m) long and 126 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesState Route 12
CrossesMccoy Creek
Location04-SOL-012-6.28-SUIS
RouteState Highway 12
CountySolano County
StateCalifornia
Coordinates38.24319, -122.01106
Functional classUrban Other Principal 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
Channel and channel protection8 Very GoodNo problems noted.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20 + Mod
Structure length127 ft (38.7 m)
Longest span12 ft (3.6 m)
Deck width126 ft (38.3 m)
Roadway width122 ft (37.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,000 (2019)
Projected traffic63,701 by 2042
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 12 over Mccoy Creek built?

It was built in 1988, making it 37 years old in 2025. It was reconstructed in 1996.

What condition is State Route 12 over Mccoy 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 2024.

How much traffic does State Route 12 over Mccoy Creek carry?

About 36,000 vehicles per day (2019 count), of which roughly 7% are trucks.

How long is State Route 12 over Mccoy Creek?

The structure is 127 ft (38.7 m) long with a longest span of 12 ft (3.6 m) and a deck 126 ft wide.

Who owns State Route 12 over Mccoy Creek?

It is owned by the State Highway Agency.