US Bridges

US014 Ef over Little Prairie Dog Ck

Poor

Stanley County, South Dakota · 1.9 N Haakon CO Line · Structure no. 000000059021402

Built
1920
105 years old
Condition
Poor
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
32 ft
1 main span
Daily traffic
50
2023 count
Owner
State
State Highway Agency

About this bridge

US014 Ef over Little Prairie Dog Ck is a steel stringer/multi-beam or girder carrying US014 Ef over Little Prairie Dog Ck in Stanley County, South Dakota. It was built in 1920, so it is 105 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 50 vehicles a day, roughly 5% of them trucks, projected to reach 50 by 2043. The structure is 32 ft (9.8 m) long and 20 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesUS014 Ef
CrossesLittle Prairie Dog Ck
Location1.9 N Haakon CO Line
RouteU.S. Route 14
Coordinates44.19388, -101.12706
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating50 US tons
Inventory rating30 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span31 ft (9.4 m)
Deck width20 ft (6.2 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic50 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US014 Ef over Little Prairie Dog Ck built?

It was built in 1920, making it 105 years old in 2025.

What condition is US014 Ef over Little Prairie Dog Ck in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2023.

How much traffic does US014 Ef over Little Prairie Dog Ck carry?

About 50 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is US014 Ef over Little Prairie Dog Ck?

The structure is 32 ft (9.8 m) long with a longest span of 31 ft (9.4 m) and a deck 20 ft wide.

Who owns US014 Ef over Little Prairie Dog Ck?

It is owned by the State Highway Agency.