US Bridges

180th Street over Trib. to Stray Horse Crk

Good

Hamlin County, South Dakota · 3N & 7.1E of Castlewood · Structure no. 000000029291020

Built
2020
5 years old
Condition
Good
inspected July 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
40
2022 count
Owner
County
County Highway Agency

About this bridge

180th Street over Trib. to Stray Horse Crk is a concrete culvert carrying 180th Street over Trib. to Stray Horse Crk in Hamlin County, South Dakota. It was built in 2020, so it is 5 years old, younger than the South Dakota average of 48.9 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 40 vehicles a day, roughly 2% of them trucks, projected to reach 40 by 2032. The structure is 21 ft (6.4 m) long and 21 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries180th Street
CrossesTrib. to Stray Horse Crk
Location3N & 7.1E of Castlewood
Coordinates44.77548, -96.90228
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJuly 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 rating63.1 US tons
Inventory rating48.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length21 ft (6.4 m)
Longest span10 ft (3.1 m)
Deck width21 ft (6.4 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2022)
Projected traffic40 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 180th Street over Trib. to Stray Horse Crk built?

It was built in 2020, making it 5 years old in 2025.

What condition is 180th Street over Trib. to Stray Horse Crk 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 July 2024.

How much traffic does 180th Street over Trib. to Stray Horse Crk carry?

About 40 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 180th Street over Trib. to Stray Horse Crk?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3.1 m) and a deck 21 ft wide.

Who owns 180th Street over Trib. to Stray Horse Crk?

It is owned by the County Highway Agency.