US Bridges

Hillgate Road over Elk Creek

Good

Colusa County, California · 0.1 MI W of Jensen Ave · Structure no. 15C0094

Built
1972
53 years old
Condition
Good
inspected October 2023
Type
Tee Beam
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
739
2014 count
Owner
County
County Highway Agency

About this bridge

Hillgate Road over Elk Creek is a prestressed concrete tee beam carrying Hillgate Road over Elk Creek in Colusa County, California. It was built in 1972, so it is 53 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 739 vehicles a day, roughly 10% of them trucks, projected to reach 1,130 by 2042. The structure is 60 ft (18.4 m) long and 32 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesHillgate Road
CrossesElk Creek
Location0.1 MI W of Jensen Ave
RouteCounty Highway 0
Coordinates39.01253, -122.09065
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length60 ft (18.4 m)
Longest span58 ft (17.7 m)
Deck width32 ft (9.9 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic739 (2014)
Projected traffic1,130 by 2042
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 Hillgate Road over Elk Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is Hillgate Road over Elk Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does Hillgate Road over Elk Creek carry?

About 739 vehicles per day (2014 count), of which roughly 10% are trucks.

How long is Hillgate Road over Elk Creek?

The structure is 60 ft (18.4 m) long with a longest span of 58 ft (17.7 m) and a deck 32 ft wide.

Who owns Hillgate Road over Elk Creek?

It is owned by the County Highway Agency.