US Bridges

County Highway over So Branch Forest River

FairPosted for load

Grand Forks County, North Dakota · 1 North 12 West Inkster · Structure no. 000000018101020

Built
1959
66 years old, rebuilt 2005
Condition
Fair
inspected September 2023
Type
Truss - Thru
Steel
Length
39 ft
1 main span
Daily traffic
10
2019 count
Owner
County
County Highway Agency

About this bridge

County Highway over So Branch Forest River is a steel truss - thru carrying County Highway over So Branch Forest River in Grand Forks County, North Dakota. It was built in 1959 and reconstructed in 2005, so it is 66 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 10 vehicles a day, projected to reach 10 by 2039. The structure is 39 ft (11.9 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Highway
CrossesSo Branch Forest River
Location1 North 12 West Inkster
RouteCounty Highway 0
CountyGrand Forks County
StateNorth Dakota
Coordinates48.16593, -97.88985
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
Deck7 GoodSome minor problems.
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating17.7 US tons
Inventory rating10.6 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadH 20
Structure length39 ft (11.9 m)
Longest span36 ft (11 m)
Deck width26 ft (8 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2019)
Projected traffic10 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$218,000
NavigationNo navigation control on waterway

Frequently asked questions

When was County Highway over So Branch Forest River built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2005.

What condition is County Highway over So Branch 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 September 2023.

How much traffic does County Highway over So Branch Forest River carry?

About 10 vehicles per day (2019 count).

How long is County Highway over So Branch Forest River?

The structure is 39 ft (11.9 m) long with a longest span of 36 ft (11 m) and a deck 26 ft wide.

Who owns County Highway over So Branch Forest River?

It is owned by the County Highway Agency.