Structure L2015454 · Butte County, CA

Doe Mill Road over Butte Creek

Carries Doe Mill Road over Butte Creek, 18 Mi NE Of Chico Ca.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT127 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

127 ft end to end. 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.

Built20179 years old
Length127.0 ft38.7 m
Daily traffic160counted 2023
Last inspectedApril 2023every 24 months

Location

StateCalifornia
CountyButte
Location18 Mi NE Of Chico Ca
CarriesDoe Mill Road
CrossesButte Creek
Coordinates39.90902, -121.61821

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length127.0 ft (38.7 m)
Max Span121.7 ft (37.1 m)
Deck Width20.3 ft (6.2 m)
Deck Area239.9 sq m
Main Spans1
Year Built2017

Traffic

Avg Daily Traffic160 (2023)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerBureau of Land Management
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number0000000L2015454

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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