Structure 2 0068 · Siskiyou County, CA

State Route 96 over Thompson Creek

Carries State Route 96 over Thompson Creek, 02-sis-096-52.48.

Overall conditionPoor

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

How ratings work
Decksets the rating4/9 · Poor
Superstructure7/9 · Good
Substructure8/9 · Very Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT125 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 7/9Substructure 8/9

125 ft end to end, longest span 60 ft. 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.

Built1952rebuilt 2019
Length125.0 ft38.1 m
Daily traffic615counted 2015
Last inspectedSeptember 2024every 24 months

Location

StateCalifornia
CountySiskiyou
Location02-sis-096-52.48
CarriesState Route 96
CrossesThompson Creek
Coordinates41.86338, -123.31051

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length125.0 ft (38.1 m)
Max Span60.0 ft (18.3 m)
Deck Width36.1 ft (11 m)
Deck Area419.1 sq m
Main Spans3
Year Built1952 (reconstructed 2019)

Traffic

Avg Daily Traffic615 (2015)
Truck Traffic20%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number02 0068

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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