Structure 55C0002 · Orange County, CA

Rancho Viejo Road over Trabuco Creek Channel

Carries Rancho Viejo Road over Trabuco Creek Channel, 0.1 Mi Se/o Trabco Crk RD.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT213 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 8/9

213 ft end to end, longest span 47 ft: about 3 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.

Built1959rebuilt 1991
Length212.9 ft64.9 m
Daily traffic12,000counted 2020
Last inspectedOctober 2024every 24 months

Location

StateCalifornia
CountyOrange
Location0.1 Mi Se/o Trabco Crk RD
CarriesRancho Viejo Road
CrossesTrabuco Creek Channel
Coordinates33.52796, -117.66946

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length212.9 ft (64.9 m)
Max Span46.9 ft (14.3 m)
Deck Width75.1 ft (22.9 m)
Deck Area1486.2 sq m
Main Spans5
Year Built1959 (reconstructed 1991)

Traffic

Avg Daily Traffic12,000 (2020)
Truck Traffic1%
Lanes On Bridge4

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 Number55C0002

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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