US Bridges

146 Street over Ck

Fair

Grant County, South Dakota · 14.6W & 0.5N Marvin · Structure no. 000000026011040

Built
1948
77 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete Continuous
Length
36 ft
2 main spans
Daily traffic
95
2022 count
Owner
County
County Highway Agency

About this bridge

146 Street over Ck is a concrete continuous slab carrying 146 Street over Ck in Grant County, South Dakota. It was built in 1948, so it is 77 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 95 vehicles a day, roughly 2% of them trucks, projected to reach 95 by 2032. The structure is 36 ft (11 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries146 Street
CrossesCk
Location14.6W & 0.5N Marvin
RouteCounty Highway 0
Coordinates45.2683, -97.2025
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length36 ft (11 m)
Longest span16 ft (4.9 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic95 (2022)
Projected traffic95 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$20,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 146 Street over Ck built?

It was built in 1948, making it 77 years old in 2025.

What condition is 146 Street 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 2024.

How much traffic does 146 Street over Ck carry?

About 95 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 146 Street over Ck?

The structure is 36 ft (11 m) long with a longest span of 16 ft (4.9 m) and a deck 27 ft wide.

Who owns 146 Street over Ck?

It is owned by the County Highway Agency.