US Bridges

Old HWY 85 over Ck

Good

Butte County, South Dakota · 6 N 16.4 W Hoover · Structure no. 000000010222010

Built
1932
93 years old
Condition
Good
inspected August 2024
Type
Culvert
Concrete
Length
25 ft
3 main spans
Daily traffic
21
2022 count
Owner
County
County Highway Agency

About this bridge

Old HWY 85 over Ck is a concrete culvert carrying Old HWY 85 over Ck in Butte County, South Dakota. It was built in 1932, so it is 93 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 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 21 vehicles a day, roughly 2% of them trucks, projected to reach 30 by 2032. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 98.8 mi (159 km).

CarriesOld HWY 85
CrossesCk
Location6 N 16.4 W Hoover
RouteCounty Highway 0
Coordinates45.19862, -103.60358
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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length25 ft (7.6 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21 (2022)
Projected traffic30 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 HWY 85 over Ck built?

It was built in 1932, making it 93 years old in 2025.

What condition is Old HWY 85 over 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 August 2024.

How much traffic does Old HWY 85 over Ck carry?

About 21 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Old HWY 85 over Ck?

The structure is 25 ft (7.6 m) long with a longest span of 8 ft (2.4 m).

Who owns Old HWY 85 over Ck?

It is owned by the County Highway Agency.