US Bridges

IRR SD050 over Crow Ck

Good

Buffalo County, South Dakota · 7.2 S JCT Sd 34 · Structure no. 000000009126149

Built
1999
26 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
268 ft
3 main spans
Daily traffic
928
2024 count
Owner
State
State Highway Agency

About this bridge

IRR SD050 over Crow Ck is a steel continuous stringer/multi-beam or girder carrying IRR SD050 over Crow Ck in Buffalo County, South Dakota. It was built in 1999, so it is 26 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.

It carries about 928 vehicles a day, roughly 3% of them trucks, projected to reach 1,424 by 2044. The structure is 268 ft (81.7 m) long and 39 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

CarriesIRR SD050
CrossesCrow Ck
Location7.2 S JCT Sd 34
RouteState Highway 50
Coordinates43.97732, -99.31493
Functional classRural Minor Arterial

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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating70.1 US tons
Inventory rating42 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length268 ft (81.7 m)
Longest span110 ft (33.5 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic928 (2024)
Projected traffic1,424 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was IRR SD050 over Crow Ck built?

It was built in 1999, making it 26 years old in 2025.

What condition is IRR SD050 over Crow Ck 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 February 2023.

How much traffic does IRR SD050 over Crow Ck carry?

About 928 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is IRR SD050 over Crow Ck?

The structure is 268 ft (81.7 m) long with a longest span of 110 ft (33.5 m) and a deck 39 ft wide.

Who owns IRR SD050 over Crow Ck?

It is owned by the State Highway Agency.