US Bridges

County Highway over I-29/JOHNSTOWN Int

Fair

Grand Forks County, North Dakota · 4 North of Manvel · Structure no. 0029156680

Built
1972
53 years old, rebuilt 1983
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
235 ft
2 main spans
Daily traffic
120
2019 count
Owner
State
State Highway Agency

About this bridge

County Highway over I-29/JOHNSTOWN Int is a steel continuous stringer/multi-beam or girder carrying County Highway over I-29/JOHNSTOWN Int in Grand Forks County, North Dakota. It was built in 1972 and reconstructed in 1983, so it is 53 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.

It carries about 120 vehicles a day, roughly 10% of them trucks, projected to reach 130 by 2039. The structure is 235 ft (71.6 m) long and 35 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesCounty Highway
CrossesI-29/JOHNSTOWN Int
Location4 North of Manvel
RouteCounty Highway 0
CountyGrand Forks County
StateNorth Dakota
Coordinates48.13552, -97.1911
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
Deck9 ExcellentNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating54.2 US tons
Inventory rating32.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length235 ft (71.6 m)
Longest span115 ft (35.1 m)
Deck width35 ft (10.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2019)
Projected traffic130 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Highway over I-29/JOHNSTOWN Int built?

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 1983.

What condition is County Highway over I-29/JOHNSTOWN Int 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 April 2023.

How much traffic does County Highway over I-29/JOHNSTOWN Int carry?

About 120 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is County Highway over I-29/JOHNSTOWN Int?

The structure is 235 ft (71.6 m) long with a longest span of 115 ft (35.1 m) and a deck 35 ft wide.

Who owns County Highway over I-29/JOHNSTOWN Int?

It is owned by the State Highway Agency.