US Bridges

464th Avenue over Trib. to Stray Horse Crk

Fair

Hamlin County, South Dakota · 5E & 4.8N of Castlewood · Structure no. 000000029280002

Built
1967
58 years old
Condition
Fair
inspected July 2024
Type
Channel Beam
Concrete
Length
76 ft
3 main spans
Daily traffic
59
2022 count
Owner
County
County Highway Agency

About this bridge

464th Avenue over Trib. to Stray Horse Crk is a concrete channel beam carrying 464th Avenue over Trib. to Stray Horse Crk in Hamlin County, South Dakota. It was built in 1967, so it is 58 years old, older than the South Dakota average of 48.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 59 vehicles a day, roughly 2% of them trucks, projected to reach 59 by 2032. The structure is 76 ft (23.2 m) long and 32 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Carries464th Avenue
CrossesTrib. to Stray Horse Crk
Location5E & 4.8N of Castlewood
RouteCounty Highway 0
Coordinates44.80268, -96.92542
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadUnknown
Structure length76 ft (23.2 m)
Longest span26 ft (7.9 m)
Deck width32 ft (9.7 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic59 (2022)
Projected traffic59 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 464th Avenue over Trib. to Stray Horse Crk built?

It was built in 1967, making it 58 years old in 2025.

What condition is 464th Avenue over Trib. to Stray Horse Crk in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.

How much traffic does 464th Avenue over Trib. to Stray Horse Crk carry?

About 59 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 464th Avenue over Trib. to Stray Horse Crk?

The structure is 76 ft (23.2 m) long with a longest span of 26 ft (7.9 m) and a deck 32 ft wide.

Who owns 464th Avenue over Trib. to Stray Horse Crk?

It is owned by the County Highway Agency.