US Bridges

State Route 273 over Anderson Creek

Fair

Shasta County, California · 02-SHA-273-5.10-AND · Structure no. 06 0005

Built
1948
77 years old, rebuilt 1994
Condition
Fair
inspected April 2023
Type
Slab
Concrete Continuous
Length
123 ft
5 main spans
Daily traffic
9,800
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 273 over Anderson Creek is a concrete continuous slab carrying State Route 273 over Anderson Creek in Shasta County, California. It was built in 1948 and reconstructed in 1994, so it is 77 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 9,800 vehicles a day, roughly 8% of them trucks, projected to reach 22,083 by 2045. The structure is 123 ft (37.4 m) long and 85 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesState Route 273
CrossesAnderson Creek
Location02-SHA-273-5.10-AND
RouteState Highway 273
CountyShasta County
StateCalifornia
Coordinates40.44701, -122.29701
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating56.4 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length123 ft (37.4 m)
Longest span24 ft (7.3 m)
Deck width85 ft (26 m)
Roadway width78 ft (23.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,800 (2009)
Projected traffic22,083 by 2045
Trucks8%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 State Route 273 over Anderson Creek built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 1994.

What condition is State Route 273 over Anderson 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 April 2023.

How much traffic does State Route 273 over Anderson Creek carry?

About 9,800 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is State Route 273 over Anderson Creek?

The structure is 123 ft (37.4 m) long with a longest span of 24 ft (7.3 m) and a deck 85 ft wide.

Who owns State Route 273 over Anderson Creek?

It is owned by the State Highway Agency.