US Bridges

Nd Highway 46 over James River

Poor

LaMoure County, North Dakota · 6 East of US 281 · Structure no. 0046036983

Built
1964
61 years old
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
135 ft
3 main spans
Daily traffic
310
2020 count
Owner
State
State Highway Agency

About this bridge

Nd Highway 46 over James River is a steel continuous stringer/multi-beam or girder carrying Nd Highway 46 over James River in LaMoure County, North Dakota. It was built in 1964, so it is 61 years old, older than the North Dakota average of 48.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 310 vehicles a day, roughly 26% of them trucks, projected to reach 290 by 2040. The structure is 135 ft (41.1 m) long and 38 ft wide. If it were closed, the detour would be 37.9 mi (61 km).

CarriesNd Highway 46
CrossesJames River
Location6 East of US 281
RouteState Highway 46
Coordinates46.62922, -98.57207
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.8 US tons
Inventory rating36.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length135 ft (41.1 m)
Longest span50 ft (15.2 m)
Deck width38 ft (11.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic310 (2020)
Projected traffic290 by 2040
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.9 mi (61 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 46 over James River built?

It was built in 1964, making it 61 years old in 2025.

What condition is Nd Highway 46 over James River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does Nd Highway 46 over James River carry?

About 310 vehicles per day (2020 count), of which roughly 26% are trucks.

How long is Nd Highway 46 over James River?

The structure is 135 ft (41.1 m) long with a longest span of 50 ft (15.2 m) and a deck 38 ft wide.

Who owns Nd Highway 46 over James River?

It is owned by the State Highway Agency.