US Bridges

172nd Street over Turtle Creek

PoorPosted for load

Spink County, South Dakota · 1.0E 1.5N Redfield · Structure no. 000000058109240

Built
1915
110 years old
Condition
Poor
inspected September 2024
Type
Truss - Thru
Steel
Length
118 ft
3 main spans
Daily traffic
55
2022 count
Owner
County
County Highway Agency

About this bridge

172nd Street over Turtle Creek is a steel truss - thru carrying 172nd Street over Turtle Creek in Spink County, South Dakota. It was built in 1915, so it is 110 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 55 vehicles a day, roughly 2% of them trucks, projected to reach 55 by 2032. The structure is 118 ft (36 m) long and 18 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Carries172nd Street
CrossesTurtle Creek
Location1.0E 1.5N Redfield
RouteCounty Highway 0
Coordinates44.89706, -98.49364
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating4.3 US tons
Inventory rating3.2 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans3 (+2 approach)
Design loadUnknown
Structure length118 ft (36 m)
Longest span80 ft (24.4 m)
Deck width18 ft (5.5 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55 (2022)
Projected traffic55 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$2.3 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 172nd Street over Turtle Creek built?

It was built in 1915, making it 110 years old in 2025.

What condition is 172nd Street over Turtle Creek 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 172nd Street over Turtle Creek carry?

About 55 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 172nd Street over Turtle Creek?

The structure is 118 ft (36 m) long with a longest span of 80 ft (24.4 m) and a deck 18 ft wide.

Who owns 172nd Street over Turtle Creek?

It is owned by the County Highway Agency.