US Bridges

Interstate 5 over Cram Gulch

Fair

Siskiyou County, California · 02-SIS-005-R39.02 · Structure no. 02 0144L

Built
1969
56 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
62 ft
3 main spans
Daily traffic
7,850
2015 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 over Cram Gulch is a concrete continuous slab carrying Interstate 5 over Cram Gulch in Siskiyou County, California. It was built in 1969, so it is 56 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 7,850 vehicles a day, roughly 33% of them trucks, projected to reach 11,399 by 2040. The structure is 62 ft (18.9 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 5
CrossesCram Gulch
Location02-SIS-005-R39.02
RouteInterstate 5
Coordinates41.652, -122.54915
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
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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.9 US tons
Inventory rating41.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length62 ft (18.9 m)
Longest span24 ft (7.3 m)
Deck width41 ft (12.5 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,850 (2015)
Projected traffic11,399 by 2040
Trucks33%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Interstate 5 over Cram Gulch built?

It was built in 1969, making it 56 years old in 2025.

What condition is Interstate 5 over Cram Gulch 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 September 2023.

How much traffic does Interstate 5 over Cram Gulch carry?

About 7,850 vehicles per day (2015 count), of which roughly 33% are trucks.

How long is Interstate 5 over Cram Gulch?

The structure is 62 ft (18.9 m) long with a longest span of 24 ft (7.3 m) and a deck 41 ft wide.

Who owns Interstate 5 over Cram Gulch?

It is owned by the State Highway Agency.