Structure 12C0082 · Butte County, CA

Wheelock RD over Dry Creek

Carries Wheelock RD over Dry Creek, 0.9 Mi N Of S.r. 70.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT123 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

123 ft end to end, longest span 60 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 box-beam bridge.

Built197650 years old
Length123.0 ft37.5 m
Daily traffic279counted 2018
Last inspectedMay 2024every 24 months

Location

StateCalifornia
CountyButte
Location0.9 Mi N Of S.r. 70
CarriesWheelock RD
CrossesDry Creek
Coordinates39.63682, -121.59364

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length123.0 ft (37.5 m)
Max Span60.0 ft (18.3 m)
Deck Width28.5 ft (8.7 m)
Deck Area326.2 sq m
Main Spans2
Year Built1976

Traffic

Avg Daily Traffic279 (2018)
Truck Traffic42%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number12C0082

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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