Structure 58 0274 · Imperial County, CA

State Route 98 over Westside Main Canal

Carries State Route 98 over Westside Main Canal, 11-imp-098-22.02.

Overall conditionPoor

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating4/9 · Poor
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT151 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 4/9 · sets the rating

151 ft end to end, longest span 58 ft: 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 tee-beam bridge.

Built195571 years old
Length150.9 ft46 m
Daily traffic2,100counted 2019
Last inspectedDecember 2023every 24 months

Location

StateCalifornia
CountyImperial
Location11-imp-098-22.02
CarriesState Route 98
CrossesWestside Main Canal
Coordinates32.67843, -115.67406

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length150.9 ft (46 m)
Max Span58.1 ft (17.7 m)
Deck Width32.8 ft (10 m)
Deck Area460 sq m
Main Spans3
Year Built1955

Traffic

Avg Daily Traffic2,100 (2019)
Truck Traffic11%
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number58 0274

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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