US Bridges

State Route 96 over Bluff Creek

Good

Humboldt County, California · 01-HUM-096-28.27 · Structure no. 04 0063

Built
1960
65 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
271 ft
2 main spans
Daily traffic
560
1997 count
Owner
State
State Highway Agency

About this bridge

State Route 96 over Bluff Creek is a steel continuous stringer/multi-beam or girder carrying State Route 96 over Bluff Creek in Humboldt County, California. It was built in 1960, so it is 65 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 560 vehicles a day, roughly 24% of them trucks, projected to reach 887 by 2046. The structure is 271 ft (82.6 m) long and 30 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesState Route 96
CrossesBluff Creek
Location01-HUM-096-28.27
RouteState Highway 96
Coordinates41.23178, -123.65889
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.7 US tons
Inventory rating33.6 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length271 ft (82.6 m)
Longest span135 ft (41.3 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic560 (1997)
Projected traffic887 by 2046
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was State Route 96 over Bluff Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is State Route 96 over Bluff Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does State Route 96 over Bluff Creek carry?

About 560 vehicles per day (1997 count), of which roughly 24% are trucks.

How long is State Route 96 over Bluff Creek?

The structure is 271 ft (82.6 m) long with a longest span of 135 ft (41.3 m) and a deck 30 ft wide.

Who owns State Route 96 over Bluff Creek?

It is owned by the State Highway Agency.