US Bridges

28450 447th Ave over Turkey Ridge Ck

Fair

Turner County, South Dakota · 11S Marion · Structure no. 000000063070165

Built
1953
72 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
92 ft
4 main spans
Daily traffic
189
2022 count
Owner
County
County Highway Agency

About this bridge

28450 447th Ave over Turkey Ridge Ck is a concrete continuous slab carrying 28450 447th Ave over Turkey Ridge Ck in Turner County, South Dakota. It was built in 1953, so it is 72 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 189 vehicles a day, roughly 3% of them trucks, projected to reach 755 by 2032. The structure is 92 ft (28 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries28450 447th Ave
CrossesTurkey Ridge Ck
Location11S Marion
RouteCounty Highway 0
CountyTurner County
StateSouth Dakota
Coordinates43.26425, -97.25995
Functional classRural Major Collector

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.
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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34 US tons
Inventory rating20.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length92 ft (28 m)
Longest span25 ft (7.6 m)
Deck width28 ft (8.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic189 (2022)
Projected traffic755 by 2032
Trucks3%
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$20,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 28450 447th Ave over Turkey Ridge Ck built?

It was built in 1953, making it 72 years old in 2025.

What condition is 28450 447th Ave over Turkey Ridge 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 28450 447th Ave over Turkey Ridge Ck carry?

About 189 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 28450 447th Ave over Turkey Ridge Ck?

The structure is 92 ft (28 m) long with a longest span of 25 ft (7.6 m) and a deck 28 ft wide.

Who owns 28450 447th Ave over Turkey Ridge Ck?

It is owned by the County Highway Agency.