US Bridges

County Highway over Red River of the North

PoorClosed to traffic

Traill County, North Dakota · 8 East 7 North Hillsboro · Structure no. 000000049129100

Built
1939
86 years old
Condition
Poor
inspected October 2024
Type
Truss - Thru
Steel
Length
362 ft
2 main spans
Daily traffic
270
2019 count
Owner
County
County Highway Agency

About this bridge

County Highway over Red River of the North is a steel truss - thru carrying County Highway over Red River of the North in Traill County, North Dakota. It was built in 1939, so it is 86 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 poor condition with a lowest component rating of 0 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.

It carries about 270 vehicles a day, roughly 12% of them trucks, projected to reach 270 by 2039. The structure is 362 ft (110.3 m) long and 26 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesCounty Highway
CrossesRed River of the North
Location8 East 7 North Hillsboro
RouteCounty Highway 4912
Coordinates47.52716, -96.87119
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck0 FailedOut of service and beyond corrective action.
Superstructure1 Imminent FailureMajor deterioration or section loss present in critical structural components. Bridge is closed to traffic but corrective action may put it back in light service.
Substructure1 Imminent FailureMajor deterioration or section loss present in critical structural components. Bridge is closed to traffic but corrective action may put it back in light service.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusClosed to all traffic
ScourFoundations stable; scour above top of footing
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating0 US tons
Inventory rating0 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length362 ft (110.3 m)
Longest span177 ft (53.9 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck16 ft (4.9 m)

Traffic and service

Average daily traffic270 (2019)
Projected traffic270 by 2039
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$812,000
NavigationNo navigation control on waterway

Frequently asked questions

When was County Highway over Red River of the North built?

It was built in 1939, making it 86 years old in 2025.

What condition is County Highway over Red River of the North in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does County Highway over Red River of the North carry?

About 270 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is County Highway over Red River of the North?

The structure is 362 ft (110.3 m) long with a longest span of 177 ft (53.9 m) and a deck 26 ft wide.

Who owns County Highway over Red River of the North?

It is owned by the County Highway Agency.