US Bridges

161st Ave. SW over Coyote Creek

Good

Bowman County, North Dakota · 3 South 3 West of Rhame · Structure no. 000000006117070

Built
1991
34 years old
Condition
Good
inspected October 2023
Type
Tee Beam
Prestressed Concrete
Length
24 ft
1 main span
Daily traffic
50
2019 count
Owner
County
County Highway Agency

About this bridge

161st Ave. SW over Coyote Creek is a prestressed concrete tee beam carrying 161st Ave. SW over Coyote Creek in Bowman County, North Dakota. It was built in 1991, so it is 34 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 50 by 2039. The structure is 24 ft (7.3 m) long and 24 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
Carries161st Ave. SW
CrossesCoyote Creek
Location3 South 3 West of Rhame
RouteCounty Highway 0
CountyBowman County
StateNorth Dakota
Coordinates46.18556, -103.72267
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating79.5 US tons
Inventory rating47 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span20 ft (6.1 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2019)
Projected traffic50 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 161st Ave. SW over Coyote Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is 161st Ave. SW over Coyote 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 2023.

How much traffic does 161st Ave. SW over Coyote Creek carry?

About 50 vehicles per day (2019 count).

How long is 161st Ave. SW over Coyote Creek?

The structure is 24 ft (7.3 m) long with a longest span of 20 ft (6.1 m) and a deck 24 ft wide.

Who owns 161st Ave. SW over Coyote Creek?

It is owned by the County Highway Agency.