US Bridges

Nd Highway 1806 over Br.Square Butte Creek

Good

Morton County, North Dakota · 1 South of County Line · Structure no. 1806085052

Built
2011
14 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete
Length
37 ft
3 main spans
Daily traffic
300
2019 count
Owner
State
State Highway Agency

About this bridge

Nd Highway 1806 over Br.Square Butte Creek is a concrete culvert carrying Nd Highway 1806 over Br.Square Butte Creek in Morton County, North Dakota. It was built in 2011, so it is 14 years old, younger than the North Dakota average of 48.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 300 vehicles a day, roughly 9% of them trucks, projected to reach 370 by 2039. The structure is 37 ft (11.3 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNd Highway 1806
CrossesBr.Square Butte Creek
Location1 South of County Line
RouteState Highway 1806
CountyMorton County
StateNorth Dakota
Coordinates46.97214, -100.9656
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection9 ExcellentNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating47.1 US tons
Inventory rating36.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length37 ft (11.3 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2019)
Projected traffic370 by 2039
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$18,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Nd Highway 1806 over Br.Square Butte Creek built?

It was built in 2011, making it 14 years old in 2025.

What condition is Nd Highway 1806 over Br.Square Butte Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2023.

How much traffic does Nd Highway 1806 over Br.Square Butte Creek carry?

About 300 vehicles per day (2019 count), of which roughly 9% are trucks.

How long is Nd Highway 1806 over Br.Square Butte Creek?

The structure is 37 ft (11.3 m) long with a longest span of 12 ft (3.7 m).

Who owns Nd Highway 1806 over Br.Square Butte Creek?

It is owned by the State Highway Agency.