US Bridges

Interstate 5 NB over Lakehead Road

Fair

Shasta County, California · 02-SHA-005-R42.32 · Structure no. 06 0164R

Built
1972
53 years old
Condition
Fair
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
137 ft
1 main span
Daily traffic
8,600
2009 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 NB over Lakehead Road is a prestressed concrete box beam or girders - multiple carrying Interstate 5 NB over Lakehead Road in Shasta County, California. It was built in 1972, so it is 53 years old, younger 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 8,600 vehicles a day, roughly 30% of them trucks, projected to reach 15,872 by 2041. The structure is 137 ft (41.8 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesInterstate 5 NB
CrossesLakehead Road
Location02-SHA-005-R42.32
RouteInterstate 5
CountyShasta County
StateCalifornia
Coordinates40.91049, -122.38519
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 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 alignment8: Equal to present desirable criteria
Operating rating54.7 US tons
Inventory rating35.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length137 ft (41.8 m)
Longest span135 ft (41.2 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,600 (2009)
Projected traffic15,872 by 2041
Trucks30%
Lanes on structure2
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 Lakehead Road built?

It was built in 1972, making it 53 years old in 2025.

What condition is Interstate 5 NB over Lakehead 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 March 2024.

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

About 8,600 vehicles per day (2009 count), of which roughly 30% are trucks.

How long is Interstate 5 NB over Lakehead Road?

The structure is 137 ft (41.8 m) long with a longest span of 135 ft (41.2 m) and a deck 42 ft wide.

Who owns Interstate 5 NB over Lakehead Road?

It is owned by the State Highway Agency.