US Bridges

Nd Highway 30 over Sheyenne River

Fair

Benson County, North Dakota · 12 South of Nd 19 · Structure no. 0030123623

Built
1981
44 years old
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
156 ft
3 main spans
Daily traffic
350
2019 count
Owner
State
State Highway Agency

About this bridge

Nd Highway 30 over Sheyenne River is a prestressed concrete continuous box beam or girders - single or spread carrying Nd Highway 30 over Sheyenne River in Benson County, North Dakota. It was built in 1981, so it is 44 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 5 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 350 vehicles a day, roughly 14% of them trucks, projected to reach 350 by 2039. The structure is 156 ft (47.5 m) long and 39 ft wide. If it were closed, the detour would be 87 mi (140 km).

Location

Open in Google Maps
CarriesNd Highway 30
CrossesSheyenne River
Location12 South of Nd 19
RouteState Highway 30
CountyBenson County
StateNorth Dakota
Coordinates47.8907, -99.53305
Functional classRural Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating87.3 US tons
Inventory rating49.5 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length156 ft (47.5 m)
Longest span50 ft (15.2 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2019)
Projected traffic350 by 2039
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed87 mi (140 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nd Highway 30 over Sheyenne River built?

It was built in 1981, making it 44 years old in 2025.

What condition is Nd Highway 30 over Sheyenne 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 October 2023.

How much traffic does Nd Highway 30 over Sheyenne River carry?

About 350 vehicles per day (2019 count), of which roughly 14% are trucks.

How long is Nd Highway 30 over Sheyenne River?

The structure is 156 ft (47.5 m) long with a longest span of 50 ft (15.2 m) and a deck 39 ft wide.

Who owns Nd Highway 30 over Sheyenne River?

It is owned by the State Highway Agency.