US Bridges

East River RD over Ash Coulee

Good

Billings County, North Dakota · 14 North 1 West of Medora · Structure no. 000000004106150

Built
1985
40 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
82 ft
1 main span
Daily traffic
35
2018 count
Owner
County
County Highway Agency

About this bridge

East River RD over Ash Coulee is a prestressed concrete box beam or girders - single or spread carrying East River RD over Ash Coulee in Billings County, North Dakota. It was built in 1985, so it is 40 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 35 vehicles a day, projected to reach 35 by 2038. The structure is 82 ft (25 m) long and 32 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

CarriesEast River RD
CrossesAsh Coulee
Location14 North 1 West of Medora
RouteCounty Highway 0
Coordinates47.12071, -103.5427
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.5 US tons
Inventory rating11.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length82 ft (25 m)
Longest span78 ft (23.8 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2018)
Projected traffic35 by 2038
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 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 East River RD over Ash Coulee built?

It was built in 1985, making it 40 years old in 2025.

What condition is East River RD over Ash Coulee 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 May 2023.

How much traffic does East River RD over Ash Coulee carry?

About 35 vehicles per day (2018 count).

How long is East River RD over Ash Coulee?

The structure is 82 ft (25 m) long with a longest span of 78 ft (23.8 m) and a deck 32 ft wide.

Who owns East River RD over Ash Coulee?

It is owned by the County Highway Agency.