US Bridges

466th Avenue over Saddle Creek

PoorPosted for load

Lincoln County, South Dakota · 3.2S of Jct. US HWY 18 · Structure no. 000000042020201

Built
1964
61 years old
Condition
Poor
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
145 ft
3 main spans
Daily traffic
495
2022 count
Owner
County
County Highway Agency

About this bridge

466th Avenue over Saddle Creek is a steel continuous stringer/multi-beam or girder carrying 466th Avenue over Saddle Creek in Lincoln County, South Dakota. It was built in 1964, so it is 61 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 495 vehicles a day, roughly 9% of them trucks, projected to reach 310 by 2032. The structure is 145 ft (44.2 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Carries466th Avenue
CrossesSaddle Creek
Location3.2S of Jct. US HWY 18
RouteCounty Highway 0
Coordinates43.21326, -96.88539
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.4 US tons
Inventory rating24.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length145 ft (44.2 m)
Longest span55 ft (16.8 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic495 (2022)
Projected traffic310 by 2032
Trucks9%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.1 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 466th Avenue over Saddle Creek built?

It was built in 1964, making it 61 years old in 2025.

What condition is 466th 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 466th Avenue over Saddle Creek carry?

About 495 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is 466th Avenue over Saddle Creek?

The structure is 145 ft (44.2 m) long with a longest span of 55 ft (16.8 m) and a deck 32 ft wide.

Who owns 466th Avenue over Saddle Creek?

It is owned by the County Highway Agency.