Structure 8C0013 · Tehama County, CA

Pettyjohn Road over South Fork Cottonwood CR

Carries Pettyjohn Road over South Fork Cottonwood CR, 2.2 Mi W Of Vestal RD.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT259 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9 · sets the ratingSubstructure 7/9

259 ft end to end, longest span 95 ft: about 4 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.

Built196660 years old
Length258.9 ft78.9 m
Daily traffic40counted 2007
Last inspectedApril 2023every 24 months

Location

StateCalifornia
CountyTehama
Location2.2 Mi W Of Vestal RD
CarriesPettyjohn Road
CrossesSouth Fork Cottonwood CR
Coordinates40.18569, -122.55155

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length258.9 ft (78.9 m)
Max Span95.1 ft (29 m)
Deck Width27.9 ft (8.5 m)
Deck Area670.6 sq m
Main Spans3
Year Built1966

Traffic

Avg Daily Traffic40 (2007)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number08C0013

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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