US Bridges

County Highway over N Rockford Canal NR2-4

Good

Eddy County, North Dakota · 3 N 7 W New Rockford · Structure no. 000000014101080

Built
1989
36 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
94 ft
1 main span
Daily traffic
70
2019 count
Owner
County
County Highway Agency

About this bridge

County Highway over N Rockford Canal NR2-4 is a prestressed concrete stringer/multi-beam or girder carrying County Highway over N Rockford Canal NR2-4 in Eddy County, North Dakota. It was built in 1989, so it is 36 years old, younger than the North Dakota average of 48.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 70 vehicles a day, projected to reach 50 by 2039. The structure is 94 ft (28.7 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCounty Highway
CrossesN Rockford Canal NR2-4
Location3 N 7 W New Rockford
RouteCounty Highway 1401
CountyEddy County
StateNorth Dakota
Coordinates47.73149, -99.27586
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating52.2 US tons
Inventory rating26.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length94 ft (28.7 m)
Longest span90 ft (27.4 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (2019)
Projected traffic50 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Highway over N Rockford Canal NR2-4 built?

It was built in 1989, making it 36 years old in 2025.

What condition is County Highway over N Rockford Canal NR2-4 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does County Highway over N Rockford Canal NR2-4 carry?

About 70 vehicles per day (2019 count).

How long is County Highway over N Rockford Canal NR2-4?

The structure is 94 ft (28.7 m) long with a longest span of 90 ft (27.4 m) and a deck 31 ft wide.

Who owns County Highway over N Rockford Canal NR2-4?

It is owned by the County Highway Agency.