Structure 50552000001023 · Siskiyou County, CA

Independence Road over Independence Creek

Carries Independence Road over Independence Creek, Clear Creek.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 2 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating2/9 · Critical
Substructure6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT63 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 2/9 · sets the ratingSubstructure 6/9

63 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.

Built197056 years old
Length63.3 ft19.3 m
Daily traffic201 lanes
Last inspectedJune 2021every 12 months

Location

StateCalifornia
CountySiskiyou
LocationClear Creek
CarriesIndependence Road
CrossesIndependence Creek
Coordinates41.61435, -123.40287

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length63.3 ft (19.3 m)
Max Span58.1 ft (17.7 m)
Deck Width16.1 ft (4.9 m)
Deck Area94.6 sq m
Main Spans1
Year Built1970

Traffic

Avg Daily Traffic20
Lanes On Bridge1

Inspection & Ownership

Last InspectionJune 2021
Inspection FrequencyEvery 12 months
OwnerU.S. Forest Service
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number050552000001023

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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