US Bridges

Interstate 5 over Boulder Creek

Fair

Shasta County, California · 02-SHA-005-R17.13-RDG · Structure no. 06 0167

Built
1965
60 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
53,000
2009 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 over Boulder Creek is a concrete continuous culvert carrying Interstate 5 over Boulder Creek in Shasta County, California. It was built in 1965, so it is 60 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 53,000 vehicles a day, roughly 12% of them trucks, projected to reach 93,145 by 2044. The structure is 22 ft (6.7 m) long.

CarriesInterstate 5
CrossesBoulder Creek
Location02-SHA-005-R17.13-RDG
RouteInterstate 5
Coordinates40.60964, -122.36206
Functional classUrban 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span10 ft (3.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic53,000 (2009)
Projected traffic93,145 by 2044
Trucks12%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 over Boulder Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is Interstate 5 over Boulder Creek 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 June 2024.

How much traffic does Interstate 5 over Boulder Creek carry?

About 53,000 vehicles per day (2009 count), of which roughly 12% are trucks.

How long is Interstate 5 over Boulder Creek?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3.1 m).

Who owns Interstate 5 over Boulder Creek?

It is owned by the State Highway Agency.