US Bridges

County Highway over Little Muddy River

Good

Williams County, North Dakota · 3 West 2 South Appam · Structure no. 000000053120061

Built
2021
4 years old
Condition
Good
inspected September 2023
Type
Culvert
Concrete
Length
45 ft
3 main spans
Daily traffic
25
2019 count
Owner
County
County Highway Agency

About this bridge

County Highway over Little Muddy River is a concrete culvert carrying County Highway over Little Muddy River in Williams County, North Dakota. It was built in 2021, so it is 4 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 25 vehicles a day, projected to reach 25 by 2039. The structure is 45 ft (13.7 m) long. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCounty Highway
CrossesLittle Muddy River
Location3 West 2 South Appam
RouteCounty Highway 0
Coordinates48.54687, -103.63264
Functional classRural Local

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 protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.5 US tons
Inventory rating41.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHL 93
Structure length45 ft (13.7 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2019)
Projected traffic25 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Highway over Little Muddy River built?

It was built in 2021, making it 4 years old in 2025.

What condition is County Highway over Little Muddy River 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 September 2023.

How much traffic does County Highway over Little Muddy River carry?

About 25 vehicles per day (2019 count).

How long is County Highway over Little Muddy River?

The structure is 45 ft (13.7 m) long with a longest span of 14 ft (4.3 m).

Who owns County Highway over Little Muddy River?

It is owned by the County Highway Agency.