US Bridges

State Route 96 over Hillside

Fair

Humboldt County, California · 01-HUM-096-8.31 · Structure no. 04 0289

Built
1985
40 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
264 ft
9 main spans
Daily traffic
2,900
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 96 over Hillside is a prestressed concrete box beam or girders - multiple carrying State Route 96 over Hillside in Humboldt County, California. It was built in 1985, so it is 40 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 2,900 vehicles a day, roughly 2% of them trucks, projected to reach 3,728 by 2046. The structure is 264 ft (80.5 m) long and 18 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesState Route 96
CrossesHillside
Location01-HUM-096-8.31
RouteState Highway 96
CountyHumboldt County
StateCalifornia
Coordinates41.02091, -123.64242
Functional classRural 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 inspectionSeptember 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 alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans9 (+1 approach)
Design loadHS 20 + Mod
Structure length264 ft (80.5 m)
Longest span70 ft (21.3 m)
Deck width18 ft (5.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,900 (2009)
Projected traffic3,728 by 2046
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 96 over Hillside built?

It was built in 1985, making it 40 years old in 2025.

What condition is State Route 96 over Hillside 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 2024.

How much traffic does State Route 96 over Hillside carry?

About 2,900 vehicles per day (2009 count), of which roughly 2% are trucks.

How long is State Route 96 over Hillside?

The structure is 264 ft (80.5 m) long with a longest span of 70 ft (21.3 m) and a deck 18 ft wide.

Who owns State Route 96 over Hillside?

It is owned by the State Highway Agency.