US Bridges

Road #313 over Watson Creek

Fair

Glenn County, California · 0.1 MI W of RD #306 · Structure no. 11C0215

Built
1960
65 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
31 ft
2 main spans
Daily traffic
25
2009 count
Owner
County
County Highway Agency

About this bridge

Road #313 over Watson Creek is a concrete continuous slab carrying Road #313 over Watson Creek in Glenn County, California. It was built in 1960, so it is 65 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 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 25 vehicles a day, roughly 20% of them trucks, projected to reach 45 by 2043. The structure is 31 ft (9.3 m) long and 24 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

Location

Open in Google Maps
CarriesRoad #313
CrossesWatson Creek
Location0.1 MI W of RD #306
RouteCounty Highway 0
CountyGlenn County
StateCalifornia
Coordinates39.69937, -122.55228
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length31 ft (9.3 m)
Longest span15 ft (4.5 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2009)
Projected traffic45 by 2043
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.8 mi (56 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 Road #313 over Watson Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is Road #313 over Watson 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 August 2023.

How much traffic does Road #313 over Watson Creek carry?

About 25 vehicles per day (2009 count), of which roughly 20% are trucks.

How long is Road #313 over Watson Creek?

The structure is 31 ft (9.3 m) long with a longest span of 15 ft (4.5 m) and a deck 24 ft wide.

Who owns Road #313 over Watson Creek?

It is owned by the County Highway Agency.