Structure 10C0111 · Mendocino County, CA

Hill Road over Mill Creek

Carries Hill Road over Mill Creek, 2.0 Mi E Fairbanks RD.

Overall conditionPoor

Set by its lowest-rated component: Deck and Superstructure at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructuresets the rating4/9 · Poor
Substructure6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT123 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 4/9 · sets the ratingSubstructure 6/9

123 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 through truss.

Built1925101 years old
Length123.0 ft37.5 m
Daily traffic78counted 2014
Last inspectedAugust 2024every 12 months

Location

StateCalifornia
CountyMendocino
Location2.0 Mi E Fairbanks RD
CarriesHill Road
CrossesMill Creek
Coordinates39.74907, -123.18157

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length123.0 ft (37.5 m)
Max Span120.1 ft (36.6 m)
Deck Width18.0 ft (5.5 m)
Deck Area206.2 sq m
Main Spans1
Year Built1925

Traffic

Avg Daily Traffic78 (2014)
Truck Traffic2%
Lanes On Bridge1

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number10C0111

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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