US Bridges

156 ST over Ck

FairPosted for load

Grant County, South Dakota · 2.5E & 6.0S Twin Brooks · Structure no. 000000026245140

Built
1901
124 years old
Condition
Fair
inspected September 2024
Type
Slab
Wood or Timber
Length
24 ft
1 main span
Daily traffic
35
2022 count
Owner
County
County Highway Agency

About this bridge

156 ST over Ck is a wood or timber slab carrying 156 ST over Ck in Grant County, South Dakota. It was built in 1901, so it is 124 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. Its operating status is: posted for load restriction.

It carries about 35 vehicles a day, roughly 3% of them trucks, projected to reach 35 by 2032. The structure is 24 ft (7.3 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries156 ST
CrossesCk
Location2.5E & 6.0S Twin Brooks
RouteCounty Highway 0
Coordinates45.12086, -96.73216
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating20 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span24 ft (7.2 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2022)
Projected traffic35 by 2032
Trucks3%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$500,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 156 ST over Ck built?

It was built in 1901, making it 124 years old in 2025.

What condition is 156 ST 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 September 2024.

How much traffic does 156 ST over Ck carry?

About 35 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 156 ST over Ck?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.2 m) and a deck 24 ft wide.

Who owns 156 ST over Ck?

It is owned by the County Highway Agency.