US Bridges

County Highway over I-29/NORTHWOOD Sep

Fair

Grand Forks County, North Dakota · 3 South Nd 15 · Structure no. 0029127036

Built
1970
55 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
265 ft
4 main spans
Daily traffic
110
2019 count
Owner
State
State Highway Agency

About this bridge

County Highway over I-29/NORTHWOOD Sep is a steel continuous stringer/multi-beam or girder carrying County Highway over I-29/NORTHWOOD Sep in Grand Forks 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 110 vehicles a day, roughly 14% of them trucks, projected to reach 110 by 2039. The structure is 265 ft (80.8 m) long and 35 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCounty Highway
CrossesI-29/NORTHWOOD Sep
Location3 South Nd 15
RouteCounty Highway 0
CountyGrand Forks County
StateNorth Dakota
Coordinates47.73018, -97.07781
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.
Substructure7 GoodSome minor problems.
Last inspectionApril 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 rating80.2 US tons
Inventory rating48.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length265 ft (80.8 m)
Longest span93 ft (28.3 m)
Deck width35 ft (10.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2019)
Projected traffic110 by 2039
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 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/NORTHWOOD Sep built?

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

What condition is County Highway over I-29/NORTHWOOD Sep 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 2024.

How much traffic does County Highway over I-29/NORTHWOOD Sep carry?

About 110 vehicles per day (2019 count), of which roughly 14% are trucks.

How long is County Highway over I-29/NORTHWOOD Sep?

The structure is 265 ft (80.8 m) long with a longest span of 93 ft (28.3 m) and a deck 35 ft wide.

Who owns County Highway over I-29/NORTHWOOD Sep?

It is owned by the State Highway Agency.