Structure 53C0083 · Los Angeles County, CA

Alondra BLVD over San Gabriel Riv

Carries Alondra BLVD over San Gabriel Riv, 0.3mi W/o I-605 FWY.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure7/9 · Good
Channelnot part of overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT318 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 7/9

318 ft end to end, longest span 70 ft: about 4 semi-trucks nose to tail. Lengths and the semi-truck 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 tee-beam bridge.

Built1952rebuilt 1972
Length317.9 ft96.9 m
Daily traffic27,192counted 2016
Last inspectedJune 2024every 24 months

Location

StateCalifornia
CountyLos Angeles
Location0.3mi W/o I-605 FWY
CarriesAlondra BLVD
CrossesSan Gabriel Riv
Coordinates33.88771, -118.10887

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length317.9 ft (96.9 m)
Max Span69.9 ft (21.3 m)
Deck Width86.0 ft (26.2 m)
Deck Area2538.8 sq m
Main Spans5
Year Built1952 (reconstructed 1972)

Traffic

Avg Daily Traffic27,192 (2016)
Truck Traffic2%
Lanes On Bridge6

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number53C0083

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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