Structure 53C1225 · Los Angeles County, CA

Lassen ST over Brown Canyon Wash

Carries Lassen ST over Brown Canyon Wash, 0.16 Km W/o Canoga AVE.

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 FT69 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 69 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.

Built197155 years old
Length68.9 ft21 m
Daily traffic21,400counted 2016
Last inspectedOctober 2022every 48 months

Location

StateCalifornia
CountyLos Angeles
Location0.16 Km W/o Canoga AVE
CarriesLassen ST
CrossesBrown Canyon Wash
Coordinates34.24987, -118.59868

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length68.9 ft (21 m)
Max Span32.2 ft (9.8 m)
Deck Area436.8 sq m
Main Spans2
Year Built1971

Traffic

Avg Daily Traffic21,400 (2016)
Truck Traffic3%
Lanes On Bridge4

Inspection & Ownership

Last InspectionOctober 2022
Inspection FrequencyEvery 48 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number53C1225

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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