Structure 50152000001011 · Los Angeles County, CA

Road over Dalton Canyon

Carries Road over Dalton Canyon, No Data Entered.

Overall conditionGood

Set by its lowest-rated component: Substructure at 8 of 9.

How ratings work
Deck9/9 · Excellent
Superstructure9/9 · Excellent
Substructuresets the rating8/9 · Very Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT27 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 9/9Superstructure 9/9Substructure 8/9 · sets the rating

27 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 box-beam bridge.

Built1940rebuilt 2009
Length26.9 ft8.2 m
Daily traffic10counted 1997
Last inspectedSeptember 2024every 24 months

Location

StateCalifornia
CountyLos Angeles
LocationNo Data Entered
CarriesRoad
CrossesDalton Canyon
Coordinates34.18207, -117.79761

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length26.9 ft (8.2 m)
Max Span17.4 ft (5.3 m)
Deck Width16.1 ft (4.9 m)
Deck Area40.2 sq m
Main Spans1
Year Built1940 (reconstructed 2009)

Traffic

Avg Daily Traffic10 (1997)
Lanes On Bridge1

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerU.S. Forest Service
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number050152000001011

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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