US Bridges

US016 over French Ck

Fair

Custer County, South Dakota · 1.3 W JCT US 385 S · Structure no. 000000017214079

Built
1974
51 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete Continuous
Length
107 ft
3 main spans
Daily traffic
3,709
2024 count
Owner
State
State Highway Agency

About this bridge

US016 over French Ck is a concrete continuous slab carrying US016 over French Ck in Custer County, South Dakota. It was built in 1974, so it is 51 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 3,709 vehicles a day, roughly 5% of them trucks, projected to reach 6,049 by 2044. The structure is 107 ft (32.6 m) long and 47 ft wide. If it were closed, the detour would be 62.1 mi (100 km).

CarriesUS016
CrossesFrench Ck
Location1.3 W JCT US 385 S
RouteU.S. Route 16
Coordinates43.75474, -103.63185
Functional classRural Principal Arterial - Other

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95.7 US tons
Inventory rating57.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length107 ft (32.6 m)
Longest span39 ft (11.8 m)
Deck width47 ft (14.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,709 (2024)
Projected traffic6,049 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed62.1 mi (100 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$500,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US016 over French Ck built?

It was built in 1974, making it 51 years old in 2025.

What condition is US016 over French Ck 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 January 2025.

How much traffic does US016 over French Ck carry?

About 3,709 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is US016 over French Ck?

The structure is 107 ft (32.6 m) long with a longest span of 39 ft (11.8 m) and a deck 47 ft wide.

Who owns US016 over French Ck?

It is owned by the State Highway Agency.