US Bridges

Sully Creek Road over Sully Creek

Good

Billings County, North Dakota · 1 South of Medora · Structure no. 000000004110320

Built
2015
10 years old
Condition
Good
inspected October 2024
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
175
2016 count
Owner
County
County Highway Agency

About this bridge

Sully Creek Road over Sully Creek is a concrete culvert carrying Sully Creek Road over Sully Creek in Billings County, North Dakota. It was built in 2015, so it is 10 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 175 vehicles a day, roughly 14% of them trucks, projected to reach 175 by 2036. The structure is 23 ft (7 m) long. If it were closed, the detour would be 14.9 mi (24 km).

CarriesSully Creek Road
CrossesSully Creek
Location1 South of Medora
RouteCounty Highway 434
Coordinates46.86499, -103.45602
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.7 US tons
Inventory rating35.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length23 ft (7 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175 (2016)
Projected traffic175 by 2036
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 Sully Creek Road over Sully Creek built?

It was built in 2015, making it 10 years old in 2025.

What condition is Sully Creek Road over Sully 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 Sully Creek Road over Sully Creek carry?

About 175 vehicles per day (2016 count), of which roughly 14% are trucks.

How long is Sully Creek Road over Sully Creek?

The structure is 23 ft (7 m) long with a longest span of 11 ft (3.4 m).

Who owns Sully Creek Road over Sully Creek?

It is owned by the County Highway Agency.