US Bridges

Interstate 5 NB over Obrien Road

Fair

Shasta County, California · 02-SHA-005-R32.16R · Structure no. 06 0148R

Built
1968
57 years old, rebuilt 2012
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete Continuous
Length
110 ft
3 main spans
Daily traffic
9,150
2009 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 NB over Obrien Road is a concrete continuous tee beam carrying Interstate 5 NB over Obrien Road in Shasta County, California. It was built in 1968 and reconstructed in 2012, 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 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 9,150 vehicles a day, roughly 28% of them trucks, projected to reach 17,810 by 2041. The structure is 110 ft (33.4 m) long and 54 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesInterstate 5 NB
CrossesObrien Road
Location02-SHA-005-R32.16R
RouteInterstate 5
CountyShasta County
StateCalifornia
Coordinates40.80689, -122.32204
Functional classRural Principal Arterial - Interstate

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.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.6 US tons
Inventory rating27.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length110 ft (33.4 m)
Longest span46 ft (14 m)
Deck width54 ft (16.5 m)
Roadway width51 ft (15.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,150 (2009)
Projected traffic17,810 by 2041
Trucks28%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Interstate 5 NB over Obrien Road built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2012.

What condition is Interstate 5 NB over Obrien Road 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 February 2024.

How much traffic does Interstate 5 NB over Obrien Road carry?

About 9,150 vehicles per day (2009 count), of which roughly 28% are trucks.

How long is Interstate 5 NB over Obrien Road?

The structure is 110 ft (33.4 m) long with a longest span of 46 ft (14 m) and a deck 54 ft wide.

Who owns Interstate 5 NB over Obrien Road?

It is owned by the State Highway Agency.