US Bridges

Carson Woods Road over Rohner Creek

Good

Humboldt County, California · 0.3 MI N of Main · Structure no. 04C0246

Built
1996
29 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
70 ft
1 main span
Daily traffic
472
2015 count
Owner
City
City or Municipal Highway Agency

About this bridge

Carson Woods Road over Rohner Creek is a prestressed concrete stringer/multi-beam or girder carrying Carson Woods Road over Rohner Creek in Humboldt County, California. It was built in 1996, so it is 29 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 472 vehicles a day, roughly 5% of them trucks, projected to reach 399 by 2042. The structure is 70 ft (21.2 m) long and 31 ft wide. If it were closed, the detour would be 61.5 mi (99 km).

CarriesCarson Woods Road
CrossesRohner Creek
Location0.3 MI N of Main
RouteCounty Highway 0
Coordinates40.6029, -124.15154
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
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 geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating48.9 US tons
Inventory rating27.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length70 ft (21.2 m)
Longest span69 ft (20.9 m)
Deck width31 ft (9.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic472 (2015)
Projected traffic399 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed61.5 mi (99 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 1996, making it 29 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 472 vehicles per day (2015 count), of which roughly 5% are trucks.

How long is Carson Woods Road over Rohner Creek?

The structure is 70 ft (21.2 m) long with a longest span of 69 ft (20.9 m) and a deck 31 ft wide.

Who owns Carson Woods Road over Rohner Creek?

It is owned by the City or Municipal Highway Agency.