US Bridges

58th ST SW over Thirty Mile Creek

Good

Hettinger County, North Dakota · 6 North 10 East of Regent · Structure no. 000000021124040

Built
1994
31 years old
Condition
Good
inspected October 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
74 ft
1 main span
Daily traffic
50
2018 count
Owner
County
County Highway Agency

About this bridge

58th ST SW over Thirty Mile Creek is a prestressed concrete box beam or girders - single or spread carrying 58th ST SW over Thirty Mile Creek in Hettinger County, North Dakota. It was built in 1994, so it is 31 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 50 vehicles a day, projected to reach 60 by 2038. The structure is 74 ft (22.6 m) long and 31 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Carries58th ST SW
CrossesThirty Mile Creek
Location6 North 10 East of Regent
RouteCounty Highway 2106
Coordinates46.57273, -102.42924
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.1 US tons
Inventory rating24.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length74 ft (22.6 m)
Longest span70 ft (21.3 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2018)
Projected traffic60 by 2038
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 58th ST SW over Thirty Mile Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is 58th ST SW over Thirty Mile 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 October 2024.

How much traffic does 58th ST SW over Thirty Mile Creek carry?

About 50 vehicles per day (2018 count).

How long is 58th ST SW over Thirty Mile Creek?

The structure is 74 ft (22.6 m) long with a longest span of 70 ft (21.3 m) and a deck 31 ft wide.

Who owns 58th ST SW over Thirty Mile Creek?

It is owned by the County Highway Agency.