Structure 10 0234 · Mendocino County, CA

State Route 162 over Corral Creek

Carries State Route 162 over Corral Creek, 01-men-162-2.21.

Overall conditionFair

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

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

Elevation

Side view, colored by inspection rating
20 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 6/9

A culvert 20 ft across. Lengths are drawn to scale; at this length a semi-truck would be a speck. Each part is colored by its latest inspection rating. The inventory records lengths but not heights, so those are drawn as typical for a culvert.

Built195967 years old
Length20.0 ft6.1 m
Daily traffic860counted 2009
Last inspectedMay 2023every 24 months

Location

StateCalifornia
CountyMendocino
Location01-men-162-2.21
CarriesState Route 162
CrossesCorral Creek
Coordinates39.56640, -123.39866

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length20.0 ft (6.1 m)
Max Span20.0 ft (6.1 m)
Deck Width28.5 ft (8.7 m)
Deck Area53.1 sq m
Main Spans1
Year Built1959

Traffic

Avg Daily Traffic860 (2009)
Truck Traffic13%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number10 0234

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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