US Bridges

US016A over Little Squaw Ck

Good

Custer County, South Dakota · 2.5 E JCT Sd 87 N · Structure no. 000000017320064

Built
1987
38 years old
Condition
Good
inspected March 2023
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
1,562
2024 count
Owner
State
State Highway Agency

About this bridge

US016A over Little Squaw Ck is a concrete continuous culvert carrying US016A over Little Squaw Ck in Custer County, South Dakota. It was built in 1987, so it is 38 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 1,562 vehicles a day, roughly 3% of them trucks, projected to reach 2,548 by 2044. The structure is 21 ft (6.3 m) long. If it were closed, the detour would be 24.2 mi (39 km).

CarriesUS016A
CrossesLittle Squaw Ck
Location2.5 E JCT Sd 87 N
RouteU.S. Route 16
Coordinates43.77593, -103.41856
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99.9 US tons
Inventory rating59.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length21 ft (6.3 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,562 (2024)
Projected traffic2,548 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 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 US016A over Little Squaw Ck built?

It was built in 1987, making it 38 years old in 2025.

What condition is US016A over Little Squaw 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 March 2023.

How much traffic does US016A over Little Squaw Ck carry?

About 1,562 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is US016A over Little Squaw Ck?

The structure is 21 ft (6.3 m) long with a longest span of 10 ft (3 m).

Who owns US016A over Little Squaw Ck?

It is owned by the State Highway Agency.