Structure 53C1568 · Los Angeles County, CA

First ST over Little Dalton Wash

Carries First ST over Little Dalton Wash, 0.3mi E/o Azusa AVE.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
Channelnot part of overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT47 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 5/9 · sets the ratingSubstructure 7/9

47 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 multi-beam bridge.

Built197056 years old
Length46.9 ft14.3 m
Daily traffic2,550counted 2016
Last inspectedMarch 2024every 24 months

Location

StateCalifornia
CountyLos Angeles
Location0.3mi E/o Azusa AVE
CarriesFirst ST
CrossesLittle Dalton Wash
Coordinates34.12150, -117.90414

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length46.9 ft (14.3 m)
Max Span40.0 ft (12.2 m)
Deck Width79.7 ft (24.3 m)
Deck Area347.5 sq m
Main Spans1
Year Built1970

Traffic

Avg Daily Traffic2,550 (2016)
Truck Traffic3%
Lanes On Bridge3

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number53C1568

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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