US Bridges

IRR SD040 over Cheyenne Rv

Fair

Custer County, South Dakota · 23 SE Hermosa · Structure no. 000000017584135

Built
1994
31 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
686 ft
6 main spans
Daily traffic
—
2023 count
Owner
State
State Highway Agency

About this bridge

IRR SD040 over Cheyenne Rv is a prestressed concrete continuous stringer/multi-beam or girder carrying IRR SD040 over Cheyenne Rv in Custer County, South Dakota. It was built in 1994, so it is 31 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.

No traffic count is recorded. The structure is 686 ft (209.1 m) long and 39 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesIRR SD040
CrossesCheyenne Rv
Location23 SE Hermosa
RouteState Highway 40
CountyCuster County
StateSouth Dakota
Coordinates43.67127, -102.89232
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating67 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 25 or greater
Structure length686 ft (209.1 m)
Longest span116 ft (35.4 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic—
Projected traffic—
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 IRR SD040 over Cheyenne Rv built?

It was built in 1994, making it 31 years old in 2025.

What condition is IRR SD040 over Cheyenne Rv 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 February 2023.

How much traffic does IRR SD040 over Cheyenne Rv carry?

No traffic count is recorded for this structure.

How long is IRR SD040 over Cheyenne Rv?

The structure is 686 ft (209.1 m) long with a longest span of 116 ft (35.4 m) and a deck 39 ft wide.

Who owns IRR SD040 over Cheyenne Rv?

It is owned by the State Highway Agency.