Structure 53C0598 · Los Angeles County, CA

Walnut Grove AVE over Alhambra Wash

Carries Walnut Grove AVE over Alhambra Wash, 0.8mi N/o Sr-60 FWY.

Overall conditionPoor

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

How ratings work
Deck5/9 · Fair
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
Channelnot part of overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT59 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 4/9 · sets the rating

59 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.

Built1937rebuilt 1969
Length59.1 ft18 m
Daily traffic17,934counted 2017
Last inspectedMarch 2023every 24 months

Location

StateCalifornia
CountyLos Angeles
Location0.8mi N/o Sr-60 FWY
CarriesWalnut Grove AVE
CrossesAlhambra Wash
Coordinates34.05065, -118.08176

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length59.1 ft (18 m)
Max Span56.1 ft (17.1 m)
Deck Width81.4 ft (24.8 m)
Deck Area446.4 sq m
Main Spans1
Year Built1937 (reconstructed 1969)

Traffic

Avg Daily Traffic17,934 (2017)
Truck Traffic4%
Lanes On Bridge4

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number53C0598

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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