Structure 53C1280 · Los Angeles County, CA

Parthenia ST over Aliso Creek

Carries Parthenia ST over Aliso Creek, 0.57mi W/o Reseda BLVD.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT52 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 52 ft across with 2 openings. 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, so those are drawn as typical for a culvert.

Built1955rebuilt 1970
Length51.8 ft15.8 m
Daily traffic34,493counted 2015
Last inspectedOctober 2024every 24 months

Location

StateCalifornia
CountyLos Angeles
Location0.57mi W/o Reseda BLVD
CarriesParthenia ST
CrossesAliso Creek
Coordinates34.22813, -118.54620

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length51.8 ft (15.8 m)
Max Span24.3 ft (7.4 m)
Deck Width80.1 ft (24.4 m)
Deck Area385.5 sq m
Main Spans2
Year Built1955 (reconstructed 1970)

Traffic

Avg Daily Traffic34,493 (2015)
Truck Traffic3%
Lanes On Bridge5

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number53C1280

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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