US Bridges

State Route 36 over Hely Creek

Good

Humboldt County, California · 01-HUM-036-11.46 · Structure no. 04 0092

Built
1927
98 years old
Condition
Good
inspected June 2024
Type
Tee Beam
Concrete
Length
41 ft
1 main span
Daily traffic
1,650
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 36 over Hely Creek is a concrete tee beam carrying State Route 36 over Hely Creek in Humboldt County, California. It was built in 1927, so it is 98 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 1,650 vehicles a day, projected to reach 2,289 by 2042. The structure is 41 ft (12.5 m) long and 25 ft wide. If it were closed, the detour would be 62.8 mi (101 km).

CarriesState Route 36
CrossesHely Creek
Location01-HUM-036-11.46
RouteState Highway 36
Coordinates40.49981, -123.97496
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating28.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length41 ft (12.5 m)
Longest span38 ft (11.6 m)
Deck width25 ft (7.6 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,650 (2009)
Projected traffic2,289 by 2042
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed62.8 mi (101 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 Hely Creek built?

It was built in 1927, making it 98 years old in 2025.

What condition is State Route 36 over Hely 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 June 2024.

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

About 1,650 vehicles per day (2009 count).

How long is State Route 36 over Hely Creek?

The structure is 41 ft (12.5 m) long with a longest span of 38 ft (11.6 m) and a deck 25 ft wide.

Who owns State Route 36 over Hely Creek?

It is owned by the State Highway Agency.