US Bridges

South Main ST over Interstate 5

Fair

Tehama County, California · 02-TEH-005-R24.87-RBL · Structure no. 08 0112

Built
1964
61 years old
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
322 ft
4 main spans
Daily traffic
13,950
2015 count
Owner
State
State Highway Agency

About this bridge

South Main ST over Interstate 5 is a concrete continuous box beam or girders - multiple carrying South Main ST over Interstate 5 in Tehama County, California. It was built in 1964, so it is 61 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 13,950 vehicles a day, roughly 5% of them trucks, projected to reach 16,409 by 2046. The structure is 322 ft (98.1 m) long and 46 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesSouth Main ST
CrossesInterstate 5
Location02-TEH-005-R24.87-RBL
RouteCity Street 0
Coordinates40.15781, -122.22372
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating35.7 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length322 ft (98.1 m)
Longest span115 ft (35.2 m)
Deck width46 ft (14 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,950 (2015)
Projected traffic16,409 by 2046
Trucks5%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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 South Main ST over Interstate 5 built?

It was built in 1964, making it 61 years old in 2025.

What condition is South Main ST 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 South Main ST over Interstate 5 carry?

About 13,950 vehicles per day (2015 count), of which roughly 5% are trucks.

How long is South Main ST over Interstate 5?

The structure is 322 ft (98.1 m) long with a longest span of 115 ft (35.2 m) and a deck 46 ft wide.

Who owns South Main ST over Interstate 5?

It is owned by the State Highway Agency.