US Bridges

471st Avenue over Saddle Creek

PoorPosted for load

Lincoln County, South Dakota · 1W & 7.5S of Worthing · Structure no. 000000042070195

Built
1935
90 years old
Condition
Poor
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
32 ft
1 main span
Daily traffic
45
2022 count
Owner
County
County Highway Agency

About this bridge

471st Avenue over Saddle Creek is a steel stringer/multi-beam or girder carrying 471st Avenue over Saddle Creek in Lincoln County, South Dakota. It was built in 1935, so it is 90 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: posted for load restriction.

It carries about 45 vehicles a day, roughly 2% of them trucks, projected to reach 45 by 2032. The structure is 32 ft (9.8 m) long and 18 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries471st Avenue
CrossesSaddle Creek
Location1W & 7.5S of Worthing
Coordinates43.22193, -96.78672
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.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating18 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span30 ft (9.2 m)
Deck width18 ft (5.5 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2022)
Projected traffic45 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$1.3 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 471st Avenue over Saddle Creek built?

It was built in 1935, making it 90 years old in 2025.

What condition is 471st Avenue over Saddle 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 May 2024.

How much traffic does 471st Avenue over Saddle Creek carry?

About 45 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 471st Avenue over Saddle Creek?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.2 m) and a deck 18 ft wide.

Who owns 471st Avenue over Saddle Creek?

It is owned by the County Highway Agency.