US Bridges

State Route 151 over Interstate 5

Fair

Shasta County, California · 02-SHA-151-R6.90 · Structure no. 06 0156

Built
1968
57 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
256 ft
2 main spans
Daily traffic
11,150
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 151 over Interstate 5 is a steel continuous stringer/multi-beam or girder carrying State Route 151 over Interstate 5 in Shasta County, California. It was built in 1968, so it is 57 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 11,150 vehicles a day, roughly 5% of them trucks, projected to reach 15,558 by 2041. The structure is 256 ft (77.9 m) long and 56 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesState Route 151
CrossesInterstate 5
Location02-SHA-151-R6.90
RouteState Highway 151
Coordinates40.67948, -122.34885
Functional classUrban Minor Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.2 US tons
Inventory rating21.8 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length256 ft (77.9 m)
Longest span137 ft (41.8 m)
Deck width56 ft (17.1 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,150 (2009)
Projected traffic15,558 by 2041
Trucks5%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 151 over Interstate 5 built?

It was built in 1968, making it 57 years old in 2025.

What condition is State Route 151 over Interstate 5 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 May 2024.

How much traffic does State Route 151 over Interstate 5 carry?

About 11,150 vehicles per day (2009 count), of which roughly 5% are trucks.

How long is State Route 151 over Interstate 5?

The structure is 256 ft (77.9 m) long with a longest span of 137 ft (41.8 m) and a deck 56 ft wide.

Who owns State Route 151 over Interstate 5?

It is owned by the State Highway Agency.