US Bridges

303 Avenue over Keyapaha Rv

FairPosted for load

Tripp County, South Dakota · 1.6E & 1.2N Keyapaha · Structure no. 000000062070448

Built
1959
66 years old, rebuilt 1996
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
194 ft
4 main spans
Daily traffic
71
2022 count
Owner
County
County Highway Agency

About this bridge

303 Avenue over Keyapaha Rv is a steel stringer/multi-beam or girder carrying 303 Avenue over Keyapaha Rv in Tripp County, South Dakota. It was built in 1959 and reconstructed in 1996, so it is 66 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 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. Its operating status is: posted for load restriction.

It carries about 71 vehicles a day, roughly 3% of them trucks, projected to reach 71 by 2032. The structure is 194 ft (59.1 m) long and 27 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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Carries303 Avenue
CrossesKeyapaha Rv
Location1.6E & 1.2N Keyapaha
RouteCounty Highway 0
CountyTripp County
StateSouth Dakota
Coordinates43.1291, -100.10717
Functional classRural Major 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating35.1 US tons
Inventory rating20.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length194 ft (59.1 m)
Longest span55 ft (16.8 m)
Deck width27 ft (8.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic71 (2022)
Projected traffic71 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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$2,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 303 Avenue over Keyapaha Rv built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1996.

What condition is 303 Avenue over Keyapaha Rv 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 June 2023.

How much traffic does 303 Avenue over Keyapaha Rv carry?

About 71 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 303 Avenue over Keyapaha Rv?

The structure is 194 ft (59.1 m) long with a longest span of 55 ft (16.8 m) and a deck 27 ft wide.

Who owns 303 Avenue over Keyapaha Rv?

It is owned by the County Highway Agency.