US Bridges

County Highway over I-29/TAFT Separation

Fair

Traill County, North Dakota · 3 South of Nd 200 North · Structure no. 0029107685

Built
1970
55 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
270 ft
4 main spans
Daily traffic
180
2019 count
Owner
State
State Highway Agency

About this bridge

County Highway over I-29/TAFT Separation is a steel continuous stringer/multi-beam or girder carrying County Highway over I-29/TAFT Separation in Traill County, North Dakota. It was built in 1970, so it is 55 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 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 180 vehicles a day, roughly 12% of them trucks, projected to reach 220 by 2039. The structure is 270 ft (82.3 m) long and 35 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCounty Highway
CrossesI-29/TAFT Separation
Location3 South of Nd 200 North
RouteCounty Highway 4916
CountyTraill County
StateNorth Dakota
Coordinates47.45434, -97.07322
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating65.7 US tons
Inventory rating39.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length270 ft (82.3 m)
Longest span96 ft (29.3 m)
Deck width35 ft (10.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic180 (2019)
Projected traffic220 by 2039
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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/TAFT Separation built?

It was built in 1970, making it 55 years old in 2025.

What condition is County Highway over I-29/TAFT Separation 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 I-29/TAFT Separation carry?

About 180 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is County Highway over I-29/TAFT Separation?

The structure is 270 ft (82.3 m) long with a longest span of 96 ft (29.3 m) and a deck 35 ft wide.

Who owns County Highway over I-29/TAFT Separation?

It is owned by the State Highway Agency.