Structure 174680000000000 · Seminole County, OK

S.h. 56 over Sand Creek

Carries S.h. 56 over Sand Creek, 0.4 Mi N Jct US 270bu.

Overall conditionGood

Set by its lowest-rated component: Substructure at 8 of 9.

How ratings work
Deck9/9 · Excellent
Superstructure9/9 · Excellent
Substructuresets the rating8/9 · Very Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT121 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 9/9Superstructure 9/9Substructure 8/9 · sets the rating

121 ft end to end, longest span 40 ft. 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 multi-beam bridge.

Built1969rebuilt 2019
Length121.1 ft36.9 m
Daily traffic1,900counted 2022
Last inspectedJanuary 2024every 24 months

Location

StateOklahoma
CountySeminole
Location0.4 Mi N Jct US 270bu
CarriesS.h. 56
CrossesSand Creek
Coordinates35.16681, -96.49332

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length121.1 ft (36.9 m)
Max Span40.0 ft (12.2 m)
Deck Width45.9 ft (14 m)
Deck Area516.6 sq m
Main Spans3
Year Built1969 (reconstructed 2019)

Traffic

Avg Daily Traffic1,900 (2022)
Truck Traffic15%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number174680000000000

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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