US Bridges

SD011 over Split Rock Ck

FairPosted for load

Minnehaha County, South Dakota · 2.7 N I 90 Interch · Structure no. 000000050280139

Built
1953
72 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
315 ft
5 main spans
Daily traffic
3,442
2024 count
Owner
State
State Highway Agency

About this bridge

SD011 over Split Rock Ck is a steel continuous stringer/multi-beam or girder carrying SD011 over Split Rock Ck in Minnehaha County, South Dakota. It was built in 1953, so it is 72 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. Its operating status is: posted for load restriction.

It carries about 3,442 vehicles a day, roughly 11% of them trucks, projected to reach 5,332 by 2044. The structure is 315 ft (95.9 m) long and 32 ft wide.

CarriesSD011
CrossesSplit Rock Ck
Location2.7 N I 90 Interch
RouteState Highway 11
Coordinates43.64851, -96.57174
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.5 US tons
Inventory rating21.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length315 ft (95.9 m)
Longest span79 ft (24.2 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,442 (2024)
Projected traffic5,332 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 SD011 over Split Rock Ck built?

It was built in 1953, making it 72 years old in 2025.

What condition is SD011 over Split Rock 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 October 2024.

How much traffic does SD011 over Split Rock Ck carry?

About 3,442 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is SD011 over Split Rock Ck?

The structure is 315 ft (95.9 m) long with a longest span of 79 ft (24.2 m) and a deck 32 ft wide.

Who owns SD011 over Split Rock Ck?

It is owned by the State Highway Agency.