US Bridges

US018 over De Bell Ck

Fair

Tripp County, South Dakota · 1.2 E Todd CO Line · Structure no. 000000062028270

Built
1988
37 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete Continuous
Length
63 ft
5 main spans
Daily traffic
1,139
2024 count
Owner
State
State Highway Agency

About this bridge

US018 over De Bell Ck is a concrete continuous culvert carrying US018 over De Bell Ck in Tripp County, South Dakota. It was built in 1988, so it is 37 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 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 1,139 vehicles a day, roughly 18% of them trucks, projected to reach 1,546 by 2044. The structure is 63 ft (19.2 m) long. If it were closed, the detour would be 29.8 mi (48 km).

CarriesUS018
CrossesDe Bell Ck
Location1.2 E Todd CO Line
RouteU.S. Route 18
Coordinates43.38653, -100.18926
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating66.2 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans5
Design loadHS 20 + Mod
Structure length63 ft (19.2 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,139 (2024)
Projected traffic1,546 by 2044
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US018 over De Bell Ck built?

It was built in 1988, making it 37 years old in 2025.

What condition is US018 over De Bell 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 July 2023.

How much traffic does US018 over De Bell Ck carry?

About 1,139 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is US018 over De Bell Ck?

The structure is 63 ft (19.2 m) long with a longest span of 12 ft (3.7 m).

Who owns US018 over De Bell Ck?

It is owned by the State Highway Agency.