US Bridges

485 Avenue over Ck

PoorPosted for load

Grant County, South Dakota · 3E & 4.4S Albee · Structure no. 000000026360234

Built
1948
77 years old, rebuilt 1965
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
53 ft
3 main spans
Daily traffic
35
2022 count
Owner
County
County Highway Agency

About this bridge

485 Avenue over Ck is a wood or timber stringer/multi-beam or girder carrying 485 Avenue over Ck in Grant County, South Dakota. It was built in 1948 and reconstructed in 1965, 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 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 35 vehicles a day, roughly 2% of them trucks, projected to reach 35 by 2032. The structure is 53 ft (16.2 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries485 Avenue
CrossesCk
Location3E & 4.4S Albee
RouteCounty Highway 0
Coordinates44.98644, -96.49642
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
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 evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating5 US tons
Inventory rating4 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadUnknown
Structure length53 ft (16.2 m)
Longest span17 ft (5.2 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
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$100,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 485 Avenue over Ck built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 1965.

What condition is 485 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 September 2024.

How much traffic does 485 Avenue over Ck carry?

About 35 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 485 Avenue over Ck?

The structure is 53 ft (16.2 m) long with a longest span of 17 ft (5.2 m) and a deck 24 ft wide.

Who owns 485 Avenue over Ck?

It is owned by the County Highway Agency.