US Bridges

466 Avenue over Ck

PoorPosted for load

Grant County, South Dakota · 1.3E & 3.7N Marvin · Structure no. 000000026170008

Built
1930
95 years old, rebuilt 1985
Condition
Poor
inspected August 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
39 ft
2 main spans
Daily traffic
54
2022 count
Owner
County
County Highway Agency

About this bridge

466 Avenue over Ck is a wood or timber stringer/multi-beam or girder carrying 466 Avenue over Ck in Grant County, South Dakota. It was built in 1930 and reconstructed in 1985, so it is 95 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 54 vehicles a day, roughly 2% of them trucks, projected to reach 54 by 2032. The structure is 39 ft (11.8 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries466 Avenue
CrossesCk
Location1.3E & 3.7N Marvin
RouteCounty Highway 0
Coordinates45.31353, -96.8829
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating17 US tons
Inventory rating11 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadUnknown
Structure length39 ft (11.8 m)
Longest span17 ft (5.2 m)
Deck width24 ft (7.4 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54 (2022)
Projected traffic54 by 2032
Trucks2%
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$600,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 466 Avenue over Ck built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1985.

What condition is 466 Avenue over Ck in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does 466 Avenue over Ck carry?

About 54 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 466 Avenue over Ck?

The structure is 39 ft (11.8 m) long with a longest span of 17 ft (5.2 m) and a deck 24 ft wide.

Who owns 466 Avenue over Ck?

It is owned by the County Highway Agency.