Structure 5C0247 · Trinity County, CA

West Van Duzen RD over Van Duzen River

Carries West Van Duzen RD over Van Duzen River, 8 Mi N Zenia-ruth RD.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT182 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

182 ft end to end: about 3 semi-trucks nose to tail. Lengths and the semi-truck 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 multi-beam bridge.

Built201313 years old
Length182.1 ft55.5 m
Daily traffic578counted 2020
Last inspectedJune 2023every 24 months

Location

StateCalifornia
CountyTrinity
Location8 Mi N Zenia-ruth RD
CarriesWest Van Duzen RD
CrossesVan Duzen River
Coordinates40.37545, -123.50342

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length182.1 ft (55.5 m)
Max Span174.9 ft (53.3 m)
Deck Width31.2 ft (9.5 m)
Deck Area527.2 sq m
Main Spans1
Year Built2013

Traffic

Avg Daily Traffic578 (2020)
Truck Traffic12%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number05C0247

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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