Structure 4C0197 · Humboldt County, CA

Carson Woods Road over Rohner Creek

Carries Carson Woods Road over Rohner Creek, 0.8 Mi North Of Main ST.

Overall conditionGood

Set by its lowest-rated component: Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT29 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

29 ft end to end. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a slab bridge.

Built195967 years old
Length28.9 ft8.8 m
Daily traffic303counted 2014
Last inspectedAugust 2024every 24 months

Location

StateCalifornia
CountyHumboldt
Location0.8 Mi North Of Main ST
CarriesCarson Woods Road
CrossesRohner Creek
Coordinates40.60851, -124.14759

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length28.9 ft (8.8 m)
Max Span25.9 ft (7.9 m)
Deck Width15.1 ft (4.6 m)
Deck Area40.5 sq m
Main Spans1
Year Built1959

Traffic

Avg Daily Traffic303 (2014)
Truck Traffic5%
Lanes On Bridge1

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number04C0197

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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