US Bridges

285th Street over Trib to Little Beaver Ck

Fair

Lincoln County, South Dakota · 1.8W & 3S of Canton · Structure no. 000000042152170

Built
1978
47 years old
Condition
Fair
inspected May 2023
Type
Tee Beam
Prestressed Concrete
Length
25 ft
1 main span
Daily traffic
75
2022 count
Owner
County
County Highway Agency

About this bridge

285th Street over Trib to Little Beaver Ck is a prestressed concrete tee beam carrying 285th Street over Trib to Little Beaver Ck in Lincoln County, South Dakota. It was built in 1978, so it is 47 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 5 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 75 vehicles a day, roughly 3% of them trucks, projected to reach 97 by 2032. The structure is 25 ft (7.6 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Carries285th Street
CrossesTrib to Little Beaver Ck
Location1.8W & 3S of Canton
RouteCounty Highway 0
Coordinates43.25746, -96.62515
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span24 ft (7.3 m)
Deck width32 ft (9.7 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2022)
Projected traffic97 by 2032
Trucks3%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 285th Street over Trib to Little Beaver Ck built?

It was built in 1978, making it 47 years old in 2025.

What condition is 285th Street over Trib to Little Beaver Ck 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 2023.

How much traffic does 285th Street over Trib to Little Beaver Ck carry?

About 75 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 285th Street over Trib to Little Beaver Ck?

The structure is 25 ft (7.6 m) long with a longest span of 24 ft (7.3 m) and a deck 32 ft wide.

Who owns 285th Street over Trib to Little Beaver Ck?

It is owned by the County Highway Agency.