Structure 77420000000000 · Jackson County, OK

E1660 over Irrigation Canal

Carries E1660 over Irrigation Canal, 283 & 62 2.0 S &3.5 E.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
22 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

22 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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 slab bridge.

Built194086 years old
Length22.0 ft6.7 m
Daily traffic50counted 2022
Last inspectedJune 2024every 24 months

Location

StateOklahoma
CountyJackson
Location283 & 62 2.0 S &3.5 E
CarriesE1660
CrossesIrrigation Canal
Coordinates34.60871, -99.27369

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length22.0 ft (6.7 m)
Max Span20.0 ft (6.1 m)
Deck Width19.7 ft (6 m)
Deck Area40.2 sq m
Main Spans1
Year Built1940

Traffic

Avg Daily Traffic50 (2022)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number077420000000000

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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