US Bridges

County Highway 15 over County Drain 14

Good

Cass County, North Dakota · 2 East 1 South Mapleton · Structure no. 000000009133262

Built
2022
3 years old
Condition
Good
inspected September 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
161 ft
3 main spans
Daily traffic
1,045
2021 count
Owner
County
County Highway Agency

About this bridge

County Highway 15 over County Drain 14 is a prestressed concrete box beam or girders - single or spread carrying County Highway 15 over County Drain 14 in Cass County, North Dakota. It was built in 2022, so it is 3 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 1,045 vehicles a day, roughly 10% of them trucks, projected to reach 1,479 by 2041. The structure is 161 ft (49.2 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCounty Highway 15
CrossesCounty Drain 14
Location2 East 1 South Mapleton
RouteCounty Highway 941
Coordinates46.87018, -97.01096
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
Deck9 ExcellentNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.1 US tons
Inventory rating39.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length161 ft (49.2 m)
Longest span52 ft (15.9 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic1,045 (2021)
Projected traffic1,479 by 2041
Trucks10%
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 15 over County Drain 14 built?

It was built in 2022, making it 3 years old in 2025.

What condition is County Highway 15 over County Drain 14 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 September 2024.

How much traffic does County Highway 15 over County Drain 14 carry?

About 1,045 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is County Highway 15 over County Drain 14?

The structure is 161 ft (49.2 m) long with a longest span of 52 ft (15.9 m) and a deck 39 ft wide.

Who owns County Highway 15 over County Drain 14?

It is owned by the County Highway Agency.