US Bridges

82nd Ave SW over Knife River

Fair

Dunn County, North Dakota · 1 South 5 East Marshall · Structure no. 000000013141470

Built
1980
45 years old
Condition
Fair
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
120 ft
3 main spans
Daily traffic
65
2018 count
Owner
County
County Highway Agency

About this bridge

82nd Ave SW over Knife River is a prestressed concrete box beam or girders - multiple carrying 82nd Ave SW over Knife River in Dunn County, North Dakota. It was built in 1980, so it is 45 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 65 vehicles a day, projected to reach 30 by 2038. The structure is 120 ft (36.6 m) long and 31 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

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Carries82nd Ave SW
CrossesKnife River
Location1 South 5 East Marshall
RouteCounty Highway 1341
CountyDunn County
StateNorth Dakota
Coordinates47.12671, -102.22854
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating31.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadH 20
Structure length120 ft (36.6 m)
Longest span50 ft (15.2 m)
Deck width31 ft (9.4 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic65 (2018)
Projected traffic30 by 2038
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 82nd Ave SW over Knife River built?

It was built in 1980, making it 45 years old in 2025.

What condition is 82nd Ave SW over Knife 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 November 2023.

How much traffic does 82nd Ave SW over Knife River carry?

About 65 vehicles per day (2018 count).

How long is 82nd Ave SW over Knife River?

The structure is 120 ft (36.6 m) long with a longest span of 50 ft (15.2 m) and a deck 31 ft wide.

Who owns 82nd Ave SW over Knife River?

It is owned by the County Highway Agency.