US Bridges

County Highway #11 over Little White Rv

Fair

Mellette County, South Dakota · 10.7N & 4.8E White River · Structure no. 000000048298103

Built
1962
63 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
369 ft
5 main spans
Daily traffic
35
2022 count
Owner
County
County Highway Agency

About this bridge

County Highway #11 over Little White Rv is a steel stringer/multi-beam or girder carrying County Highway #11 over Little White Rv in Mellette County, South Dakota. It was built in 1962, so it is 63 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 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 35 vehicles a day, roughly 4% of them trucks, projected to reach 50 by 2040. The structure is 369 ft (112.5 m) long and 26 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

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CarriesCounty Highway #11
CrossesLittle White Rv
Location10.7N & 4.8E White River
RouteCounty Highway 0
CountyMellette County
StateSouth Dakota
Coordinates43.71918, -100.65344
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.3 US tons
Inventory rating24.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length369 ft (112.5 m)
Longest span90 ft (27.4 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2022)
Projected traffic50 by 2040
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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$85,000
NavigationNo navigation control on waterway

Frequently asked questions

When was County Highway #11 over Little White Rv built?

It was built in 1962, making it 63 years old in 2025.

What condition is County Highway #11 over Little 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 July 2024.

How much traffic does County Highway #11 over Little White Rv carry?

About 35 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is County Highway #11 over Little White Rv?

The structure is 369 ft (112.5 m) long with a longest span of 90 ft (27.4 m) and a deck 26 ft wide.

Who owns County Highway #11 over Little White Rv?

It is owned by the County Highway Agency.