US Bridges

State Route 96 over Hillside

Fair

Humboldt County, California · 01-HUM-096-16.84 · Structure no. 04 0142

Built
1964
61 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete
Length
186 ft
9 main spans
Daily traffic
1,505
2019 count
Owner
State
State Highway Agency

About this bridge

State Route 96 over Hillside is a concrete slab carrying State Route 96 over Hillside in Humboldt 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 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 1,505 vehicles a day, projected to reach 3,258 by 2042. The structure is 186 ft (56.7 m) long and 19 ft wide. If it were closed, the detour would be 88.9 mi (143 km).

Location

Open in Google Maps
CarriesState Route 96
CrossesHillside
Location01-HUM-096-16.84
RouteState Highway 96
CountyHumboldt County
StateCalifornia
Coordinates41.11795, -123.68837
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110 US tons
Inventory rating76.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans9
Design loadH 20
Structure length186 ft (56.7 m)
Longest span21 ft (6.4 m)
Deck width19 ft (5.8 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,505 (2019)
Projected traffic3,258 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed88.9 mi (143 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 Hillside built?

It was built in 1964, making it 61 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 1,505 vehicles per day (2019 count).

How long is State Route 96 over Hillside?

The structure is 186 ft (56.7 m) long with a longest span of 21 ft (6.4 m) and a deck 19 ft wide.

Who owns State Route 96 over Hillside?

It is owned by the State Highway Agency.