US Bridges

State Route 299 over Essex Lane

Fair

Humboldt County, California · 01-HUM-299-R2.92 · Structure no. 04 0185

Built
1965
60 years old
Condition
Fair
inspected January 2025
Type
Tee Beam
Concrete Continuous
Length
126 ft
3 main spans
Daily traffic
11,200
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 299 over Essex Lane is a concrete continuous tee beam carrying State Route 299 over Essex Lane in Humboldt 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 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 11,200 vehicles a day, roughly 9% of them trucks, projected to reach 14,228 by 2045. The structure is 126 ft (38.4 m) long and 89 ft wide.

Location

Open in Google Maps
CarriesState Route 299
CrossesEssex Lane
Location01-HUM-299-R2.92
RouteState Highway 299
CountyHumboldt County
StateCalifornia
Coordinates40.90678, -124.0376
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.6 US tons
Inventory rating26.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length126 ft (38.4 m)
Longest span44 ft (13.4 m)
Deck width89 ft (27 m)
Roadway width87 ft (26.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,200 (2009)
Projected traffic14,228 by 2045
Trucks9%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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 State Route 299 over Essex Lane built?

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

What condition is State Route 299 over Essex Lane 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 January 2025.

How much traffic does State Route 299 over Essex Lane carry?

About 11,200 vehicles per day (2009 count), of which roughly 9% are trucks.

How long is State Route 299 over Essex Lane?

The structure is 126 ft (38.4 m) long with a longest span of 44 ft (13.4 m) and a deck 89 ft wide.

Who owns State Route 299 over Essex Lane?

It is owned by the State Highway Agency.