US Bridges

28380 446 Ave over Turkey Ridge Ck

PoorClosed to traffic

Turner County, South Dakota · 1W & 9.8S Marion · Structure no. 000000063060158

Built
1910
115 years old
Condition
Poor
inspected May 2014
Type
Truss - Thru
Steel
Length
48 ft
1 main span
Daily traffic
5
2022 count
Owner
County
County Highway Agency

About this bridge

28380 446 Ave over Turkey Ridge Ck is a steel truss - thru carrying 28380 446 Ave over Turkey Ridge Ck in Turner County, South Dakota. It was built in 1910, so it is 115 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 3 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: closed to all traffic.

It carries about 5 vehicles a day, roughly 2% of them trucks, projected to reach 5 by 2032. The structure is 48 ft (14.7 m) long and 16 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Carries28380 446 Ave
CrossesTurkey Ridge Ck
Location1W & 9.8S Marion
RouteCounty Highway 0
Coordinates43.27312, -97.27964
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.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2014
Inspection intervalevery 12 months
Operating statusClosed to all traffic
ScourUnknown foundation; not evaluated for scour
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating13.7 US tons
Inventory rating10.3 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length48 ft (14.7 m)
Longest span45 ft (13.6 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2022)
Projected traffic5 by 2032
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$349,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 28380 446 Ave over Turkey Ridge Ck built?

It was built in 1910, making it 115 years old in 2025.

What condition is 28380 446 Ave over Turkey Ridge 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 May 2014.

How much traffic does 28380 446 Ave over Turkey Ridge Ck carry?

About 5 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 28380 446 Ave over Turkey Ridge Ck?

The structure is 48 ft (14.7 m) long with a longest span of 45 ft (13.6 m) and a deck 16 ft wide.

Who owns 28380 446 Ave over Turkey Ridge Ck?

It is owned by the County Highway Agency.