Structure 53 2258 · Los Angeles County, CA

Walnut ST over N710-e210 Connector Ramp

Carries Walnut ST over N710-e210 Connector Ramp, 07-la-710-r32.69-pas.

Overall conditionFair

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

How ratings work
Deck8/9 · Very Good
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT152 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 5/9 · sets the ratingSubstructure 7/9

152 ft end to end: about 2 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 box-beam bridge.

Built197551 years old
Length152.2 ft46.4 m
Daily traffic8,900counted 2019
Last inspectedSeptember 2024every 24 months

Location

StateCalifornia
CountyLos Angeles
Location07-la-710-r32.69-pas
CarriesWalnut ST
CrossesN710-e210 Connector Ramp
Coordinates34.14954, -118.15444

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length152.2 ft (46.4 m)
Max Span149.9 ft (45.7 m)
Deck Width82.0 ft (25 m)
Deck Area1,160 sq m
Main Spans1
Year Built1975

Traffic

Avg Daily Traffic8,900 (2019)
Truck Traffic5%
Lanes On Bridge5
Lanes Under Bridge3

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number53 2258

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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