US Bridges

Two Mile Road over Stone Corral Creek

Fair

Colusa County, California · 1.9 MI N of Maxwell RD · Structure no. 15C0023

Built
1983
42 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
93 ft
3 main spans
Daily traffic
76
2014 count
Owner
County
County Highway Agency

About this bridge

Two Mile Road over Stone Corral Creek is a concrete continuous slab carrying Two Mile Road over Stone Corral Creek in Colusa County, California. It was built in 1983, so it is 42 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 76 vehicles a day, roughly 10% of them trucks, projected to reach 137 by 2041. The structure is 93 ft (28.2 m) long and 25 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesTwo Mile Road
CrossesStone Corral Creek
Location1.9 MI N of Maxwell RD
RouteCounty Highway 0
Coordinates39.30434, -122.15397
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 inspectionJuly 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.6 US tons
Inventory rating53.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length93 ft (28.2 m)
Longest span36 ft (11 m)
Deck width25 ft (7.5 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic76 (2014)
Projected traffic137 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 Two Mile Road over Stone Corral Creek built?

It was built in 1983, making it 42 years old in 2025.

What condition is Two Mile Road over Stone Corral 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 July 2023.

How much traffic does Two Mile Road over Stone Corral Creek carry?

About 76 vehicles per day (2014 count), of which roughly 10% are trucks.

How long is Two Mile Road over Stone Corral Creek?

The structure is 93 ft (28.2 m) long with a longest span of 36 ft (11 m) and a deck 25 ft wide.

Who owns Two Mile Road over Stone Corral Creek?

It is owned by the County Highway Agency.