Structure 6119230 · Bowman County, ND

158th Avenue SW over North Fork Grand River

Carries 158th Avenue SW over North Fork Grand River, 19 South Of Rhame.

Overall conditionGood

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

How ratings work
Culvertsets the rating9/9 · Excellent
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
24 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 9/9

A culvert 24 ft across with 2 openings. 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, so those are drawn as typical for a culvert.

Built200719 years old
Length24.0 ft7.3 m
Daily traffic90counted 2017
Last inspectedOctober 2021every 48 months

Location

StateNorth Dakota
CountyBowman
Location19 South Of Rhame
Carries158th Avenue SW
CrossesNorth Fork Grand River
Coordinates45.95257, -103.66008

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length24.0 ft (7.3 m)
Max Span11.5 ft (3.5 m)
Deck Area44.5 sq m
Main Spans2
Year Built2007

Traffic

Avg Daily Traffic90 (2017)
Truck Traffic12%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2021
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000006119230

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.