US Bridges

284th Street over Long Creek

Fair

Lincoln County, South Dakota · 5S & 0.2W of Lennox · Structure no. 000000042018160

Built
1991
34 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete Continuous
Length
93 ft
3 main spans
Daily traffic
55
2022 count
Owner
County
County Highway Agency

About this bridge

284th Street over Long Creek is a concrete continuous slab carrying 284th Street over Long Creek in Lincoln County, South Dakota. It was built in 1991, so it is 34 years old, younger than the South Dakota average of 48.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 55 vehicles a day, roughly 2% of them trucks, projected to reach 55 by 2032. The structure is 93 ft (28.4 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries284th Street
CrossesLong Creek
Location5S & 0.2W of Lennox
Coordinates43.27244, -96.88779
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.9 US tons
Inventory rating34.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length93 ft (28.4 m)
Longest span35 ft (10.7 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 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 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 284th Street over Long Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is 284th Street over Long Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2024.

How much traffic does 284th Street over Long Creek carry?

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

How long is 284th Street over Long Creek?

The structure is 93 ft (28.4 m) long with a longest span of 35 ft (10.7 m) and a deck 31 ft wide.

Who owns 284th Street over Long Creek?

It is owned by the County Highway Agency.