US Bridges

Irrsr Nd Hiway 31 over Cedar Creek

Good

Sioux County, North Dakota · 10 North of Sd Border · Structure no. 0031010364

Built
1964
61 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
190 ft
3 main spans
Daily traffic
160
2019 count
Owner
State
State Highway Agency

About this bridge

Irrsr Nd Hiway 31 over Cedar Creek is a steel continuous stringer/multi-beam or girder carrying Irrsr Nd Hiway 31 over Cedar Creek in Sioux County, North Dakota. It was built in 1964, so it is 61 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 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 160 vehicles a day, roughly 31% of them trucks, projected to reach 245 by 2039. The structure is 190 ft (57.9 m) long and 36 ft wide. If it were closed, the detour would be 44.7 mi (72 km).

Location

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CarriesIrrsr Nd Hiway 31
CrossesCedar Creek
Location10 North of Sd Border
RouteState Highway 31
CountySioux County
StateNorth Dakota
Coordinates46.09163, -101.33379
Functional classRural Minor Arterial

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 protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating65 US tons
Inventory rating38.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length190 ft (57.9 m)
Longest span71 ft (21.6 m)
Deck width36 ft (10.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160 (2019)
Projected traffic245 by 2039
Trucks31%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.7 mi (72 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$300,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Irrsr Nd Hiway 31 over Cedar Creek built?

It was built in 1964, making it 61 years old in 2025.

What condition is Irrsr Nd Hiway 31 over Cedar Creek 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 May 2023.

How much traffic does Irrsr Nd Hiway 31 over Cedar Creek carry?

About 160 vehicles per day (2019 count), of which roughly 31% are trucks.

How long is Irrsr Nd Hiway 31 over Cedar Creek?

The structure is 190 ft (57.9 m) long with a longest span of 71 ft (21.6 m) and a deck 36 ft wide.

Who owns Irrsr Nd Hiway 31 over Cedar Creek?

It is owned by the State Highway Agency.