US Bridges

366 Ave over Ck

Fair

Hand County, South Dakota · 6 E & 20.9 N Miller · Structure no. 000000030220041

Built
1970
55 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
36 ft
1 main span
Daily traffic
76
2022 count
Owner
County
County Highway Agency

About this bridge

366 Ave over Ck is a concrete stringer/multi-beam or girder carrying 366 Ave over Ck in Hand County, South Dakota. It was built in 1970, so it is 55 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 6 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 76 vehicles a day, roughly 2% of them trucks, projected to reach 76 by 2032. The structure is 36 ft (11 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Carries366 Ave
CrossesCk
Location6 E & 20.9 N Miller
RouteCounty Highway 0
Coordinates44.8353, -98.86633
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length36 ft (11 m)
Longest span35 ft (10.7 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic76 (2022)
Projected traffic76 by 2032
Trucks2%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$193,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 366 Ave over Ck built?

It was built in 1970, making it 55 years old in 2025.

What condition is 366 Ave over Ck 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 August 2023.

How much traffic does 366 Ave over Ck carry?

About 76 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 366 Ave over Ck?

The structure is 36 ft (11 m) long with a longest span of 35 ft (10.7 m) and a deck 32 ft wide.

Who owns 366 Ave over Ck?

It is owned by the County Highway Agency.