Structure 50651000001009 · Butte County, CA

Road 27n04 over Butt Creek

Carries Road 27n04 over Butt Creek, No Data Entered.

Overall conditionFair

Set by its lowest-rated component: Deck and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT50 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 6/9 · sets the rating

50 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.

Built195571 years old
Length49.9 ft15.2 m
Daily traffic301 lanes
Last inspectedApril 2024every 24 months

Location

StateCalifornia
CountyButte
LocationNo Data Entered
CarriesRoad 27n04
CrossesButt Creek
Coordinates40.19759, -121.27793

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length49.9 ft (15.2 m)
Max Span49.9 ft (15.2 m)
Deck Width14.1 ft (4.3 m)
Deck Area65.4 sq m
Main Spans1
Year Built1955

Traffic

Avg Daily Traffic30
Lanes On Bridge1

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerU.S. Forest Service
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number050651000001009

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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