Structure 31C0013 · Alpine County, CA

Crystal Sprgs Camp over West Fork Carson River

Carries Crystal Sprgs Camp over West Fork Carson River, 0.1 Mile South Of S.h. 88.

Overall conditionPoor

Set by its lowest-rated component: Deck at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructure5/9 · Fair
Substructure5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT55 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 5/9Substructure 5/9

55 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 multi-beam bridge.

Built193888 years old
Length55.1 ft16.8 m
Daily traffic275counted 1979
Last inspectedSeptember 2023every 24 months

Location

StateCalifornia
CountyAlpine
Location0.1 Mile South Of S.h. 88
CarriesCrystal Sprgs Camp
CrossesWest Fork Carson River
Coordinates38.76879, -119.83900

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length55.1 ft (16.8 m)
Max Span53.1 ft (16.2 m)
Deck Width25.3 ft (7.7 m)
Deck Area129.4 sq m
Main Spans1
Year Built1938

Traffic

Avg Daily Traffic275 (1979)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number31C0013

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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