US Bridges

SR 200 (central) over US Highway 101

Good

Humboldt County, California · 01-HUM-200-R0.01 · Structure no. 04 0172

Built
1964
61 years old
Condition
Good
inspected November 2023
Type
Tee Beam
Concrete Continuous
Length
278 ft
4 main spans
Daily traffic
2,500
2009 count
Owner
State
State Highway Agency

About this bridge

SR 200 (central) over US Highway 101 is a concrete continuous tee beam carrying SR 200 (central) over US Highway 101 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 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 2,500 vehicles a day, roughly 4% of them trucks, projected to reach 3,352 by 2041. The structure is 278 ft (84.7 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesSR 200 (central)
CrossesUS Highway 101
Location01-HUM-200-R0.01
RouteState Highway 200
CountyHumboldt County
StateCalifornia
Coordinates40.92065, -124.09834
Functional classUrban 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.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than 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 rating41.1 US tons
Inventory rating31.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length278 ft (84.7 m)
Longest span80 ft (24.4 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,500 (2009)
Projected traffic3,352 by 2041
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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 SR 200 (central) over US Highway 101 built?

It was built in 1964, making it 61 years old in 2025.

What condition is SR 200 (central) over US Highway 101 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 November 2023.

How much traffic does SR 200 (central) over US Highway 101 carry?

About 2,500 vehicles per day (2009 count), of which roughly 4% are trucks.

How long is SR 200 (central) over US Highway 101?

The structure is 278 ft (84.7 m) long with a longest span of 80 ft (24.4 m) and a deck 34 ft wide.

Who owns SR 200 (central) over US Highway 101?

It is owned by the State Highway Agency.