US Bridges

318 Avenue over White Rv

Fair

Tripp County, South Dakota · 5.7W & 7.5N Hamill · Structure no. 000000062223045

Built
1980
45 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
398 ft
4 main spans
Daily traffic
47
2022 count
Owner
County
County Highway Agency

About this bridge

318 Avenue over White Rv is a steel continuous stringer/multi-beam or girder carrying 318 Avenue over White Rv in Tripp County, South Dakota. It was built in 1980, so it is 45 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 47 vehicles a day, roughly 3% of them trucks, projected to reach 47 by 2032. The structure is 398 ft (121.3 m) long and 33 ft wide. If it were closed, the detour would be 37.9 mi (61 km).

Location

Open in Google Maps
Carries318 Avenue
CrossesWhite Rv
Location5.7W & 7.5N Hamill
RouteCounty Highway 0
CountyTripp County
StateSouth Dakota
Coordinates43.71195, -99.79611
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating67.1 US tons
Inventory rating40.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length398 ft (121.3 m)
Longest span110 ft (33.5 m)
Deck width33 ft (10 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic47 (2022)
Projected traffic47 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.9 mi (61 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$9,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 318 Avenue over White Rv built?

It was built in 1980, making it 45 years old in 2025.

What condition is 318 Avenue over White 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 318 Avenue over White Rv carry?

About 47 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 318 Avenue over White Rv?

The structure is 398 ft (121.3 m) long with a longest span of 110 ft (33.5 m) and a deck 33 ft wide.

Who owns 318 Avenue over White Rv?

It is owned by the County Highway Agency.