Structure 6 0005 · Shasta County, CA

State Route 273 over Anderson Creek

Carries State Route 273 over Anderson Creek, 02-sha-273-5.10-and.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
Channelnot part of overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT123 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 5/9 · sets the ratingSubstructure 7/9

123 ft end to end, longest span 24 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 slab bridge.

Built1948rebuilt 1994
Length122.7 ft37.4 m
Daily traffic9,800counted 2009
Last inspectedApril 2023every 24 months

Location

StateCalifornia
CountyShasta
Location02-sha-273-5.10-and
CarriesState Route 273
CrossesAnderson Creek
Coordinates40.44701, -122.29701

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length122.7 ft (37.4 m)
Max Span24.0 ft (7.3 m)
Deck Width85.3 ft (26 m)
Deck Area972.4 sq m
Main Spans5
Year Built1948 (reconstructed 1994)

Traffic

Avg Daily Traffic9,800 (2009)
Truck Traffic8%
Lanes On Bridge5

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number06 0005

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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