Structure 8750005S0000000 · Shasta County, CA

Route 11 over Upper Clear Creek

Carries Route 11 over Upper Clear Creek, 0.2 Miles N Of HWY 299 (m.

Overall conditionFair

Set by its lowest-rated component: Deck and Substructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT100 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 5/9 · sets the rating

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

Built1940rebuilt 1977
Length100.1 ft30.5 m
Daily traffic30counted 2013
Last inspectedJuly 2023every 24 months

Location

StateCalifornia
CountyShasta
Location0.2 Miles N Of HWY 299 (m
CarriesRoute 11
CrossesUpper Clear Creek
Coordinates40.66819, -122.63386

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length100.1 ft (30.5 m)
Max Span60.0 ft (18.3 m)
Deck Width14.1 ft (4.3 m)
Deck Area131.2 sq m
Main Spans2
Year Built1940 (reconstructed 1977)

Traffic

Avg Daily Traffic30 (2013)
Lanes On Bridge1

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerNational Park Service
Historical SignificanceBridge is not eligible for the National Register
Scour Critical4 — Foundations need monitoring
Structure Number8750005S0000000

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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