Structure 50554000001069 · Siskiyou County, CA

Methodist Ck Road over S. Fk. Salmon River

Carries Methodist Ck Road over S. Fk. Salmon River, Forks.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 3 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating3/9 · Serious
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT204 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 3/9 · sets the ratingSubstructure 7/9

204 ft end to end, longest span 80 ft: 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.

Built196363 years old
Length204.1 ft62.2 m
Daily traffic201 lanes
Last inspectedOctober 2024every 24 months

Location

StateCalifornia
CountySiskiyou
LocationForks
CarriesMethodist Ck Road
CrossesS. Fk. Salmon River
Coordinates41.22260, -123.25003

Physical Characteristics

MaterialConcrete
DesignStringer/Multi-beam
Total Length204.1 ft (62.2 m)
Max Span80.1 ft (24.4 m)
Deck Width16.1 ft (4.9 m)
Deck Area304.8 sq m
Main Spans3
Year Built1963

Traffic

Avg Daily Traffic20
Lanes On Bridge1

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerU.S. Forest Service
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number050554000001069

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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