US Bridges

State Route 273 over Clear Creek

Good

Shasta County, California · 02-SHA-273-11.23 · Structure no. 06 0203

Built
1995
30 years old
Condition
Good
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
470 ft
4 main spans
Daily traffic
21,400
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 273 over Clear Creek is a prestressed concrete continuous box beam or girders - multiple carrying State Route 273 over Clear Creek in Shasta County, California. It was built in 1995, so it is 30 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 21,400 vehicles a day, roughly 4% of them trucks, projected to reach 26,012 by 2045. The structure is 470 ft (143.3 m) long and 94 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 273
CrossesClear Creek
Location02-SHA-273-11.23
RouteState Highway 273
Coordinates40.50852, -122.37976
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 protection9 ExcellentNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length470 ft (143.3 m)
Longest span140 ft (42.7 m)
Deck width94 ft (28.8 m)
Roadway width91 ft (27.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,400 (2009)
Projected traffic26,012 by 2045
Trucks4%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
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 Clear Creek built?

It was built in 1995, making it 30 years old in 2025.

What condition is State Route 273 over Clear 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 April 2023.

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

About 21,400 vehicles per day (2009 count), of which roughly 4% are trucks.

How long is State Route 273 over Clear Creek?

The structure is 470 ft (143.3 m) long with a longest span of 140 ft (42.7 m) and a deck 94 ft wide.

Who owns State Route 273 over Clear Creek?

It is owned by the State Highway Agency.