US Bridges

SD079NF over ST Joseph ST Rcp&e RR

Fair

Pennington County, South Dakota · 1.2 S JCT Sd 44 · Structure no. 000000052430314

Built
1964
61 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
724 ft
6 main spans
Daily traffic
23,179
2023 count
Owner
State
State Highway Agency

About this bridge

SD079NF over ST Joseph ST Rcp&e RR is a steel continuous stringer/multi-beam or girder carrying SD079NF over ST Joseph ST Rcp&e RR in Pennington County, South Dakota. It was built in 1964, so it is 61 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 23,179 vehicles a day, roughly 6% of them trucks, projected to reach 32,500 by 2043. The structure is 724 ft (220.7 m) long and 56 ft wide.

Location

Open in Google Maps
CarriesSD079NF
CrossesST Joseph ST Rcp&e RR
Location1.2 S JCT Sd 44
RouteState Highway 79
CountyPennington County
StateSouth Dakota
Coordinates44.06339, -103.19161
Functional classUrban Other Principal 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length724 ft (220.7 m)
Longest span130 ft (39.6 m)
Deck width56 ft (17.2 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,179 (2023)
Projected traffic32,500 by 2043
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3.5 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was SD079NF over ST Joseph ST Rcp&e RR built?

It was built in 1964, making it 61 years old in 2025.

What condition is SD079NF over ST Joseph ST Rcp&e RR 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 April 2023.

How much traffic does SD079NF over ST Joseph ST Rcp&e RR carry?

About 23,179 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is SD079NF over ST Joseph ST Rcp&e RR?

The structure is 724 ft (220.7 m) long with a longest span of 130 ft (39.6 m) and a deck 56 ft wide.

Who owns SD079NF over ST Joseph ST Rcp&e RR?

It is owned by the State Highway Agency.