US Bridges

County Highway over Little Muddy River

Fair

Williams County, North Dakota · 2 North 1 East Williston · Structure no. 000000053122300

Built
1984
41 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
120 ft
3 main spans
Daily traffic
340
2019 count
Owner
County
County Highway Agency

About this bridge

County Highway over Little Muddy River is a prestressed concrete continuous box beam or girders - single or spread carrying County Highway over Little Muddy River in Williams County, North Dakota. It was built in 1984, so it is 41 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 340 vehicles a day, roughly 10% of them trucks, projected to reach 450 by 2039. The structure is 120 ft (36.6 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesCounty Highway
CrossesLittle Muddy River
Location2 North 1 East Williston
RouteCounty Highway 5328
Coordinates48.19775, -103.60388
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating43.9 US tons
Inventory rating26 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length120 ft (36.6 m)
Longest span48 ft (14.6 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic340 (2019)
Projected traffic450 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Highway over Little Muddy River built?

It was built in 1984, making it 41 years old in 2025.

What condition is County Highway over Little Muddy River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2023.

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

About 340 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is County Highway over Little Muddy River?

The structure is 120 ft (36.6 m) long with a longest span of 48 ft (14.6 m) and a deck 32 ft wide.

Who owns County Highway over Little Muddy River?

It is owned by the County Highway Agency.