US Bridges

Old HWY 99 W over Thomes Creek

Fair

Tehama County, California · 3.7 MI N Solano ST · Structure no. 08C0377

Built
2016
9 years old
Condition
Fair
inspected November 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
609 ft
5 main spans
Daily traffic
4,591
2008 count
Owner
County
County Highway Agency

About this bridge

Old HWY 99 W over Thomes Creek is a prestressed concrete continuous box beam or girders - multiple carrying Old HWY 99 W over Thomes Creek in Tehama County, California. It was built in 2016, so it is 9 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 4,591 vehicles a day, roughly 12% of them trucks, projected to reach 6,141 by 2042. The structure is 609 ft (185.6 m) long and 44 ft wide. If it were closed, the detour would be 13 mi (21 km).

CarriesOld HWY 99 W
CrossesThomes Creek
Location3.7 MI N Solano ST
RouteCounty Highway 0
Coordinates39.97822, -122.17687
Functional classRural Major 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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
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 rating46.4 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHL 93
Structure length609 ft (185.6 m)
Longest span134 ft (40.8 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,591 (2008)
Projected traffic6,141 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 Old HWY 99 W over Thomes Creek built?

It was built in 2016, making it 9 years old in 2025.

What condition is Old HWY 99 W over Thomes 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 November 2024.

How much traffic does Old HWY 99 W over Thomes Creek carry?

About 4,591 vehicles per day (2008 count), of which roughly 12% are trucks.

How long is Old HWY 99 W over Thomes Creek?

The structure is 609 ft (185.6 m) long with a longest span of 134 ft (40.8 m) and a deck 44 ft wide.

Who owns Old HWY 99 W over Thomes Creek?

It is owned by the County Highway Agency.