US Bridges

IRR SD073 over Burlington Northern RR

Good

Corson County, South Dakota · 0.1 S North Dakota Line · Structure no. 000000016026001

Built
1977
48 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
199 ft
3 main spans
Daily traffic
274
2024 count
Owner
State
State Highway Agency

About this bridge

IRR SD073 over Burlington Northern RR is a steel continuous stringer/multi-beam or girder carrying IRR SD073 over Burlington Northern RR in Corson County, South Dakota. It was built in 1977, so it is 48 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 274 vehicles a day, roughly 28% of them trucks, projected to reach 358 by 2044. The structure is 199 ft (60.7 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesIRR SD073
CrossesBurlington Northern RR
Location0.1 S North Dakota Line
RouteState Highway 73
Coordinates45.94313, -101.95718
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.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length199 ft (60.7 m)
Longest span84 ft (25.6 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic274 (2024)
Projected traffic358 by 2044
Trucks28%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.9 mi (3 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 SD073 over Burlington Northern RR built?

It was built in 1977, making it 48 years old in 2025.

What condition is IRR SD073 over Burlington Northern RR 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 May 2024.

How much traffic does IRR SD073 over Burlington Northern RR carry?

About 274 vehicles per day (2024 count), of which roughly 28% are trucks.

How long is IRR SD073 over Burlington Northern RR?

The structure is 199 ft (60.7 m) long with a longest span of 84 ft (25.6 m) and a deck 35 ft wide.

Who owns IRR SD073 over Burlington Northern RR?

It is owned by the State Highway Agency.