US Bridges

Carson Woods Road over Rohner Creek

Good

Humboldt County, California · 0.8 MI North of Main ST · Structure no. 04C0197

Built
1959
66 years old
Condition
Good
inspected August 2024
Type
Slab
Concrete
Length
29 ft
1 main span
Daily traffic
303
2014 count
Owner
County
County Highway Agency

About this bridge

Carson Woods Road over Rohner Creek is a concrete slab carrying Carson Woods Road over Rohner Creek in Humboldt County, California. It was built in 1959, so it is 66 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 303 vehicles a day, roughly 5% of them trucks, projected to reach 1,000 by 2041. The structure is 29 ft (8.8 m) long and 15 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesCarson Woods Road
CrossesRohner Creek
Location0.8 MI North of Main ST
RouteCounty Highway 0
Coordinates40.60851, -124.14759
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.8 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span26 ft (7.9 m)
Deck width15 ft (4.6 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic303 (2014)
Projected traffic1,000 by 2041
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Carson Woods Road over Rohner Creek built?

It was built in 1959, making it 66 years old in 2025.

What condition is Carson Woods Road over Rohner 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 August 2024.

How much traffic does Carson Woods Road over Rohner Creek carry?

About 303 vehicles per day (2014 count), of which roughly 5% are trucks.

How long is Carson Woods Road over Rohner Creek?

The structure is 29 ft (8.8 m) long with a longest span of 26 ft (7.9 m) and a deck 15 ft wide.

Who owns Carson Woods Road over Rohner Creek?

It is owned by the County Highway Agency.