US Bridges

County Highway over Forest River

Fair

Nelson County, North Dakota · 12 N 3 E Petersburg · Structure no. 000000032128010

Built
1978
47 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete
Length
31 ft
3 main spans
Daily traffic
166
2017 count
Owner
County
County Highway Agency

About this bridge

County Highway over Forest River is a concrete culvert carrying County Highway over Forest River in Nelson County, North Dakota. It was built in 1978, so it is 47 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 166 vehicles a day, roughly 15% of them trucks, projected to reach 166 by 2037. The structure is 31 ft (9.5 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCounty Highway
CrossesForest River
Location12 N 3 E Petersburg
RouteCounty Highway 3229
CountyNelson County
StateNorth Dakota
Coordinates47.18778, -97.92492
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length31 ft (9.5 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic166 (2017)
Projected traffic166 by 2037
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Forest River built?

It was built in 1978, making it 47 years old in 2025.

What condition is County Highway over Forest 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 August 2024.

How much traffic does County Highway over Forest River carry?

About 166 vehicles per day (2017 count), of which roughly 15% are trucks.

How long is County Highway over Forest River?

The structure is 31 ft (9.5 m) long with a longest span of 10 ft (3 m).

Who owns County Highway over Forest River?

It is owned by the County Highway Agency.