US Bridges

County Highway over Maple River

FairPosted for load

Cass County, North Dakota · 2 East 2 South Chaffee · Structure no. 000000009119351

Built
1945
80 years old
Condition
Fair
inspected July 2023
Type
Truss - Thru
Steel
Length
109 ft
1 main span
Daily traffic
20
2019 count
Owner
County
County Highway Agency

About this bridge

County Highway over Maple River is a steel truss - thru carrying County Highway over Maple River in Cass County, North Dakota. It was built in 1945, so it is 80 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 fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 20 vehicles a day, projected to reach 20 by 2039. The structure is 109 ft (33.2 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Highway
CrossesMaple River
Location2 East 2 South Chaffee
RouteCounty Highway 0
CountyCass County
StateNorth Dakota
Coordinates46.74254, -97.30413
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating21.7 US tons
Inventory rating13 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+2 approach)
Design loadUnknown
Structure length109 ft (33.2 m)
Longest span49 ft (14.9 m)
Deck width24 ft (7.2 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2019)
Projected traffic20 by 2039
Trucks—
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$281,000
NavigationNo navigation control on waterway

Frequently asked questions

When was County Highway over Maple River built?

It was built in 1945, making it 80 years old in 2025.

What condition is County Highway over Maple 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 July 2023.

How much traffic does County Highway over Maple River carry?

About 20 vehicles per day (2019 count).

How long is County Highway over Maple River?

The structure is 109 ft (33.2 m) long with a longest span of 49 ft (14.9 m) and a deck 24 ft wide.

Who owns County Highway over Maple River?

It is owned by the County Highway Agency.