US Bridges

County Highway over Rush River

Fair

Cass County, North Dakota · 5 North of Mapleton · Structure no. 000000009131190

Built
1980
45 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
65 ft
2 main spans
Daily traffic
365
2019 count
Owner
County
County Highway Agency

About this bridge

County Highway over Rush River is a prestressed concrete continuous box beam or girders - single or spread carrying County Highway over Rush River in Cass County, North Dakota. It was built in 1980, so it is 45 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 365 vehicles a day, roughly 14% of them trucks, projected to reach 270 by 2039. The structure is 65 ft (19.8 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Highway
CrossesRush River
Location5 North of Mapleton
RouteCounty Highway 941
CountyCass County
StateNorth Dakota
Coordinates46.96649, -97.05142
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.1 US tons
Inventory rating24 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length65 ft (19.8 m)
Longest span30 ft (9.1 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic365 (2019)
Projected traffic270 by 2039
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 County Highway over Rush River built?

It was built in 1980, making it 45 years old in 2025.

What condition is County Highway over Rush 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 May 2023.

How much traffic does County Highway over Rush River carry?

About 365 vehicles per day (2019 count), of which roughly 14% are trucks.

How long is County Highway over Rush River?

The structure is 65 ft (19.8 m) long with a longest span of 30 ft (9.1 m) and a deck 35 ft wide.

Who owns County Highway over Rush River?

It is owned by the County Highway Agency.