US Bridges

County Highway over I-29/PITTSBURG Int

Fair

Pembina County, North Dakota · 4 North of Nd 66 · Structure no. 0029190955

Built
1959
66 years old, rebuilt 1997
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
245 ft
4 main spans
Daily traffic
200
2019 count
Owner
State
State Highway Agency

About this bridge

County Highway over I-29/PITTSBURG Int is a prestressed concrete continuous stringer/multi-beam or girder carrying County Highway over I-29/PITTSBURG Int in Pembina County, North Dakota. It was built in 1959 and reconstructed in 1997, 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.

It carries about 200 vehicles a day, roughly 14% of them trucks, projected to reach 200 by 2039. The structure is 245 ft (74.7 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesCounty Highway
CrossesI-29/PITTSBURG Int
Location4 North of Nd 66
RouteCounty Highway 3428
CountyPembina County
StateNorth Dakota
Coordinates48.6295, -97.18186
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating54.7 US tons
Inventory rating32.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length245 ft (74.7 m)
Longest span58 ft (17.7 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2019)
Projected traffic200 by 2039
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.7 mi (6 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/PITTSBURG Int built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1997.

What condition is County Highway over I-29/PITTSBURG 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 November 2023.

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

About 200 vehicles per day (2019 count), of which roughly 14% are trucks.

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

The structure is 245 ft (74.7 m) long with a longest span of 58 ft (17.7 m) and a deck 29 ft wide.

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

It is owned by the State Highway Agency.