Structure 25008224 · Morton County, ND

Nd Highway over Square Butte Creek

Carries Nd Highway over Square Butte Creek, 8 North Of I-94.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT106 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

106 ft end to end. Lengths and the car 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.

Built198739 years old
Length106.0 ft32.3 m
Daily traffic1,020counted 2019
Last inspectedJune 2023every 24 months

Location

StateNorth Dakota
CountyMorton
Location8 North Of I-94
CarriesNd Highway
CrossesSquare Butte Creek
Coordinates46.97690, -101.03027

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length106.0 ft (32.3 m)
Max Span102.0 ft (31.1 m)
Deck Width42.7 ft (13 m)
Deck Area419.9 sq m
Main Spans1
Year Built1987

Traffic

Avg Daily Traffic1,020 (2019)
Truck Traffic11%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number0025008224

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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