US Bridges

SD013 over Spring Ck

Fair

Moody County, South Dakota · 5.2 S Brookings CO Line · Structure no. 000000051150051

Built
1963
62 years old
Condition
Fair
inspected December 2024
Type
Slab
Concrete Continuous
Length
99 ft
3 main spans
Daily traffic
1,073
2024 count
Owner
State
State Highway Agency

About this bridge

SD013 over Spring Ck is a concrete continuous slab carrying SD013 over Spring Ck in Moody County, South Dakota. It was built in 1963, so it is 62 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 5 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 1,073 vehicles a day, roughly 11% of them trucks, projected to reach 1,367 by 2044. The structure is 99 ft (30.3 m) long and 34 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

CarriesSD013
CrossesSpring Ck
Location5.2 S Brookings CO Line
RouteState Highway 13
Coordinates44.12179, -96.58912
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.1 US tons
Inventory rating45.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length99 ft (30.3 m)
Longest span35 ft (10.8 m)
Deck width34 ft (10.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,073 (2024)
Projected traffic1,367 by 2044
Trucks11%
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 SD013 over Spring Ck built?

It was built in 1963, making it 62 years old in 2025.

What condition is SD013 over Spring 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 December 2024.

How much traffic does SD013 over Spring Ck carry?

About 1,073 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is SD013 over Spring Ck?

The structure is 99 ft (30.3 m) long with a longest span of 35 ft (10.8 m) and a deck 34 ft wide.

Who owns SD013 over Spring Ck?

It is owned by the State Highway Agency.