Structure 53C2249 · Los Angeles County, CA

Stephen Ranch RD over Unnamed Wash

Carries Stephen Ranch RD over Unnamed Wash, 2.2mi N/o Baseline RD.

Overall conditionGood

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

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT34 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 34 ft across with 3 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.

Built196066 years old
Length33.8 ft10.3 m
Daily traffic252counted 2017
Last inspectedOctober 2023every 24 months

Location

StateCalifornia
CountyLos Angeles
Location2.2mi N/o Baseline RD
CarriesStephen Ranch RD
CrossesUnnamed Wash
Coordinates34.14621, -117.75555

Physical Characteristics

MaterialSteel
DesignCulvert
Total Length33.8 ft (10.3 m)
Max Span5.9 ft (1.8 m)
Deck Width39.4 ft (12 m)
Deck Area123.6 sq m
Main Spans3
Year Built1960

Traffic

Avg Daily Traffic252 (2017)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number53C2249

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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