Structure 55C0046 · Orange County, CA

Memory Lane over Santa Ana River Channel

Carries Memory Lane over Santa Ana River Channel, 0.1 Mi. E/o City Drive.

Overall conditionPoor

Set by its lowest-rated component: Deck at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructure7/9 · Good
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT611 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 7/9Substructure 7/9

611 ft end to end, longest span 44 ft: about 1.7 football fields. 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.

Built1936rebuilt 2004
Length610.9 ft186.2 m
Daily traffic18,900counted 2021
Last inspectedApril 2023every 24 months

Location

StateCalifornia
CountyOrange
Location0.1 Mi. E/o City Drive
CarriesMemory Lane
CrossesSanta Ana River Channel
Coordinates33.77396, -117.88990

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length610.9 ft (186.2 m)
Max Span44.0 ft (13.4 m)
Deck Width91.9 ft (28 m)
Deck Area5213.6 sq m
Main Spans15
Year Built1936 (reconstructed 2004)

Traffic

Avg Daily Traffic18,900 (2021)
Truck Traffic1%
Lanes On Bridge6

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number55C0046

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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