US Bridges

Nd Highway 46 over Maple River

Good

Ransom County, North Dakota · City of Enderlin · Structure no. 0046083657

Built
1994
31 years old
Condition
Good
inspected June 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
140 ft
3 main spans
Daily traffic
1,900
2019 count
Owner
State
State Highway Agency

About this bridge

Nd Highway 46 over Maple River is a prestressed concrete continuous box beam or girders - single or spread carrying Nd Highway 46 over Maple River in Ransom County, North Dakota. It was built in 1994, so it is 31 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,900 vehicles a day, roughly 11% of them trucks, projected to reach 1,400 by 2039. The structure is 140 ft (42.7 m) long and 43 ft wide. If it were closed, the detour would be 26.1 mi (42 km).

CarriesNd Highway 46
CrossesMaple River
LocationCity of Enderlin
RouteState Highway 46
Coordinates46.62977, -97.60082
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.1 US tons
Inventory rating48.9 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length140 ft (42.7 m)
Longest span45 ft (13.7 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,900 (2019)
Projected traffic1,400 by 2039
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.1 mi (42 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 Maple River built?

It was built in 1994, making it 31 years old in 2025.

What condition is Nd Highway 46 over Maple River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

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

About 1,900 vehicles per day (2019 count), of which roughly 11% are trucks.

How long is Nd Highway 46 over Maple River?

The structure is 140 ft (42.7 m) long with a longest span of 45 ft (13.7 m) and a deck 43 ft wide.

Who owns Nd Highway 46 over Maple River?

It is owned by the State Highway Agency.