Structure 10F0057 · Mendocino County, CA

Forest Road 452 over Hare Creek

Carries Forest Road 452 over Hare Creek, West Of Jct Forest RD 400.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck7/9 · Good
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT53 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9Substructure 4/9 · sets the rating

53 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 girder bridge.

Built199729 years old
Length52.8 ft16.1 m
Daily traffic10counted 2009
Last inspectedMay 2023every 24 months

Location

StateCalifornia
CountyMendocino
LocationWest Of Jct Forest RD 400
CarriesForest Road 452
CrossesHare Creek
Coordinates39.39316, -123.74046

Physical Characteristics

MaterialSteel
DesignGirder and Floorbeam
Total Length52.8 ft (16.1 m)
Max Span50.9 ft (15.5 m)
Deck Width11.8 ft (3.6 m)
Deck Area58.0 sq m
Main Spans1
Year Built1997

Traffic

Avg Daily Traffic10 (2009)
Truck Traffic1%
Lanes On Bridge1

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerState Park/Forest Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number10F0057

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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