US Bridges

SD071 over Duck Ck

Good

Fall River County, South Dakota · 2.5 S JCT Sd 471 · Structure no. 000000024202282

Built
1992
33 years old
Condition
Good
inspected April 2024
Type
Slab
Concrete Continuous
Length
103 ft
3 main spans
Daily traffic
208
2024 count
Owner
State
State Highway Agency

About this bridge

SD071 over Duck Ck is a concrete continuous slab carrying SD071 over Duck Ck in Fall River County, South Dakota. It was built in 1992, so it is 33 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 208 vehicles a day, roughly 32% of them trucks, projected to reach 309 by 2044. The structure is 103 ft (31.3 m) long and 39 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

CarriesSD071
CrossesDuck Ck
Location2.5 S JCT Sd 471
RouteState Highway 71
Coordinates43.0697, -103.66001
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating101.7 US tons
Inventory rating61 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length103 ft (31.3 m)
Longest span36 ft (11.1 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic208 (2024)
Projected traffic309 by 2044
Trucks32%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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 SD071 over Duck Ck built?

It was built in 1992, making it 33 years old in 2025.

What condition is SD071 over Duck Ck in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does SD071 over Duck Ck carry?

About 208 vehicles per day (2024 count), of which roughly 32% are trucks.

How long is SD071 over Duck Ck?

The structure is 103 ft (31.3 m) long with a longest span of 36 ft (11.1 m) and a deck 39 ft wide.

Who owns SD071 over Duck Ck?

It is owned by the State Highway Agency.