US Bridges

County Highway over Tributary to Maple River

Good

Cass County, North Dakota · 2 East of Chaffee · Structure no. 000000009120320

Built
1985
40 years old
Condition
Good
inspected July 2023
Type
Channel Beam
Prestressed Concrete
Length
56 ft
1 main span
Daily traffic
310
2019 count
Owner
County
County Highway Agency

About this bridge

County Highway over Tributary to Maple River is a prestressed concrete channel beam carrying County Highway over Tributary to Maple River in Cass 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 310 vehicles a day, roughly 12% of them trucks, projected to reach 130 by 2039. The structure is 56 ft (17.1 m) long and 36 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCounty Highway
CrossesTributary to Maple River
Location2 East of Chaffee
RouteCounty Highway 944
Coordinates46.77432, -97.29752
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.4 US tons
Inventory rating36.3 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length56 ft (17.1 m)
Longest span50 ft (15.2 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic310 (2019)
Projected traffic130 by 2039
Trucks12%
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 Tributary to Maple River built?

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

What condition is County Highway over Tributary to 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 July 2023.

How much traffic does County Highway over Tributary to Maple River carry?

About 310 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is County Highway over Tributary to Maple River?

The structure is 56 ft (17.1 m) long with a longest span of 50 ft (15.2 m) and a deck 36 ft wide.

Who owns County Highway over Tributary to Maple River?

It is owned by the County Highway Agency.