US Bridges

Interstate 5 over Dunnigan Creek

Fair

Yolo County, California · 03-YOL-005-R25.97 · Structure no. 22 0172

Built
1968
57 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete Continuous
Length
33 ft
3 main spans
Daily traffic
30,000
2014 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 over Dunnigan Creek is a concrete continuous culvert carrying Interstate 5 over Dunnigan Creek in Yolo County, California. It was built in 1968, so it is 57 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 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 30,000 vehicles a day, roughly 29% of them trucks, projected to reach 49,346 by 2042. The structure is 33 ft (10.1 m) long. If it were closed, the detour would be 19.9 mi (32 km).

CarriesInterstate 5
CrossesDunnigan Creek
Location03-YOL-005-R25.97
RouteInterstate 5
Coordinates38.88714, -121.97601
Functional classRural Principal Arterial - Interstate

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.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 20
Structure length33 ft (10.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,000 (2014)
Projected traffic49,346 by 2042
Trucks29%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 Interstate 5 over Dunnigan Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is Interstate 5 over Dunnigan 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 Interstate 5 over Dunnigan Creek carry?

About 30,000 vehicles per day (2014 count), of which roughly 29% are trucks.

How long is Interstate 5 over Dunnigan Creek?

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m).

Who owns Interstate 5 over Dunnigan Creek?

It is owned by the State Highway Agency.