US Bridges

County Highway over Forest River

Fair

Nelson County, North Dakota · 11 No. 4 E. Petersburg · Structure no. 000000032129010

Built
1980
45 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Prestressed Concrete
Length
35 ft
1 main span
Daily traffic
50
2017 count
Owner
County
County Highway Agency

About this bridge

County Highway over Forest River is a prestressed concrete tee beam carrying County Highway over Forest River in Nelson 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 50 vehicles a day, projected to reach 25 by 2037. The structure is 35 ft (10.7 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCounty Highway
CrossesForest River
Location11 No. 4 E. Petersburg
RouteCounty Highway 0
CountyNelson County
StateNorth Dakota
Coordinates48.18048, -97.91135
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating79.9 US tons
Inventory rating47.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length35 ft (10.7 m)
Longest span33 ft (10.1 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2017)
Projected traffic25 by 2037
Trucks—
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 1980, making it 45 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 50 vehicles per day (2017 count).

How long is County Highway over Forest River?

The structure is 35 ft (10.7 m) long with a longest span of 33 ft (10.1 m) and a deck 32 ft wide.

Who owns County Highway over Forest River?

It is owned by the County Highway Agency.