US Bridges

116th Ave SW over Knife River

Fair

Dunn County, North Dakota · 2 North 9 West Manning · Structure no. 000000013108380

Built
1993
32 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
118 ft
3 main spans
Daily traffic
50
2018 count
Owner
County
County Highway Agency

About this bridge

116th Ave SW over Knife River is a prestressed concrete continuous box beam or girders - single or spread carrying 116th Ave SW over Knife River in Dunn County, North Dakota. It was built in 1993, so it is 32 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 50 vehicles a day, projected to reach 60 by 2038. The structure is 118 ft (36 m) long and 31 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
Carries116th Ave SW
CrossesKnife River
Location2 North 9 West Manning
RouteCounty Highway 1307
CountyDunn County
StateNorth Dakota
Coordinates47.25682, -102.94783
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.6 US tons
Inventory rating29.5 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length118 ft (36 m)
Longest span44 ft (13.4 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2018)
Projected traffic60 by 2038
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 116th Ave SW over Knife River built?

It was built in 1993, making it 32 years old in 2025.

What condition is 116th 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 June 2023.

How much traffic does 116th Ave SW over Knife River carry?

About 50 vehicles per day (2018 count).

How long is 116th Ave SW over Knife River?

The structure is 118 ft (36 m) long with a longest span of 44 ft (13.4 m) and a deck 31 ft wide.

Who owns 116th Ave SW over Knife River?

It is owned by the County Highway Agency.