US Bridges

Calument over Spring Creek

GoodPosted for load

Pennington County, South Dakota · T 1 S R 5 E Sec 14 · Structure no. 020306000010096

Built
1988
37 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
57 ft
1 main span
Daily traffic
50
1991 count
Owner
Federal
U.S. Forest Service

About this bridge

Calument over Spring Creek is a steel stringer/multi-beam or girder carrying Calument over Spring Creek in Pennington 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 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. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, projected to reach 75 by 2045. The structure is 57 ft (17.3 m) long and 24 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

CarriesCalument
CrossesSpring Creek
LocationT 1 S R 5 E Sec 14
RouteFederal Lands Road 392
Coordinates43.96493, -103.37648
Functional classRural Local

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 protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating18.2 US tons
Inventory rating13.9 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 20
Structure length57 ft (17.3 m)
Longest span55 ft (16.7 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (1991)
Projected traffic75 by 2045
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed620.7 mi (999 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Calument over Spring Creek built?

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

What condition is Calument over Spring Creek 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 May 2024.

How much traffic does Calument over Spring Creek carry?

About 50 vehicles per day (1991 count).

How long is Calument over Spring Creek?

The structure is 57 ft (17.3 m) long with a longest span of 55 ft (16.7 m) and a deck 24 ft wide.

Who owns Calument over Spring Creek?

It is owned by the U.S. Forest Service.