US Bridges

Old Highway 79 over Horsehead Ck

Good

Fall River County, South Dakota · 5.6W & 5.7N Oelrichs · Structure no. 000000024360143

Built
1992
33 years old
Condition
Good
inspected May 2024
Type
Tee Beam
Prestressed Concrete
Length
101 ft
3 main spans
Daily traffic
58
2022 count
Owner
County
County Highway Agency

About this bridge

Old Highway 79 over Horsehead Ck is a prestressed concrete tee beam carrying Old Highway 79 over Horsehead Ck in Fall River County, South Dakota. It was built in 1992, so it is 33 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 58 vehicles a day, roughly 2% of them trucks, projected to reach 58 by 2032. The structure is 101 ft (30.9 m) long and 31 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesOld Highway 79
CrossesHorsehead Ck
Location5.6W & 5.7N Oelrichs
RouteCounty Highway 0
Coordinates43.26981, -103.34676
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating61.9 US tons
Inventory rating38 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length101 ft (30.9 m)
Longest span40 ft (12.2 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58 (2022)
Projected traffic58 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 Old Highway 79 over Horsehead Ck built?

It was built in 1992, making it 33 years old in 2025.

What condition is Old Highway 79 over Horsehead Ck 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 May 2024.

How much traffic does Old Highway 79 over Horsehead Ck carry?

About 58 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Old Highway 79 over Horsehead Ck?

The structure is 101 ft (30.9 m) long with a longest span of 40 ft (12.2 m) and a deck 31 ft wide.

Who owns Old Highway 79 over Horsehead Ck?

It is owned by the County Highway Agency.