US Bridges

State Route 36 over Yager Creek

Fair

Humboldt County, California · 01-HUM-036-4.86 · Structure no. 04 0089

Built
1968
57 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
396 ft
4 main spans
Daily traffic
2,800
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 36 over Yager Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying State Route 36 over Yager Creek in Humboldt County, California. It was built in 1968, so it is 57 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 2,800 vehicles a day, projected to reach 4,475 by 2042. The structure is 396 ft (120.7 m) long and 42 ft wide. If it were closed, the detour would be 72.7 mi (117 km).

Location

Open in Google Maps
CarriesState Route 36
CrossesYager Creek
Location01-HUM-036-4.86
RouteState Highway 36
CountyHumboldt County
StateCalifornia
Coordinates40.53743, -124.06346
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.7 US tons
Inventory rating17.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length396 ft (120.7 m)
Longest span100 ft (30.5 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,800 (2009)
Projected traffic4,475 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed72.7 mi (117 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 36 over Yager Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is State Route 36 over Yager Creek 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 June 2024.

How much traffic does State Route 36 over Yager Creek carry?

About 2,800 vehicles per day (2009 count).

How long is State Route 36 over Yager Creek?

The structure is 396 ft (120.7 m) long with a longest span of 100 ft (30.5 m) and a deck 42 ft wide.

Who owns State Route 36 over Yager Creek?

It is owned by the State Highway Agency.