US Bridges

179th Street over Turtle Creek

PoorPosted for load

Spink County, South Dakota · 4.0N 4.9W Tulare · Structure no. 000000058051310

Built
1908
117 years old
Condition
Poor
inspected September 2024
Type
Truss - Thru
Steel
Length
104 ft
1 main span
Daily traffic
55
2022 count
Owner
County
County Highway Agency

About this bridge

179th Street over Turtle Creek is a steel truss - thru carrying 179th Street over Turtle Creek in Spink County, South Dakota. It was built in 1908, so it is 117 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 2 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 104 ft (31.7 m) long and 18 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Carries179th Street
CrossesTurtle Creek
Location4.0N 4.9W Tulare
RouteCounty Highway 0
Coordinates44.7931, -98.60404
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
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
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 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating4.3 US tons
Inventory rating3.2 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+2 approach)
Design loadUnknown
Structure length104 ft (31.7 m)
Longest span48 ft (14.6 m)
Deck width18 ft (5.4 m)
Roadway width17 ft (5.2 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 closed8.1 mi (13 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$1.7 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 179th Street over Turtle Creek built?

It was built in 1908, making it 117 years old in 2025.

What condition is 179th 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 179th Street over Turtle Creek carry?

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

How long is 179th Street over Turtle Creek?

The structure is 104 ft (31.7 m) long with a longest span of 48 ft (14.6 m) and a deck 18 ft wide.

Who owns 179th Street over Turtle Creek?

It is owned by the County Highway Agency.