US Bridges

I029 N over W Benson RD

Good

Minnehaha County, South Dakota · Benson RD Interchange · Structure no. 000000050181180

Built
2002
23 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
208 ft
1 main span
Daily traffic
23,855
2024 count
Owner
State
State Highway Agency

About this bridge

I029 N over W Benson RD is a steel stringer/multi-beam or girder carrying I029 N over W Benson RD in Minnehaha County, South Dakota. It was built in 2002, so it is 23 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 23,855 vehicles a day, roughly 11% of them trucks, projected to reach 37,595 by 2044. The structure is 208 ft (63.4 m) long and 59 ft wide.

CarriesI029 N
CrossesW Benson RD
LocationBenson RD Interchange
RouteInterstate 29
Coordinates43.58772, -96.77091
Functional classUrban Principal Arterial - Interstate

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 inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.5 US tons
Inventory rating47 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length208 ft (63.4 m)
Longest span204 ft (62.2 m)
Deck width59 ft (17.9 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,855 (2024)
Projected traffic37,595 by 2044
Trucks11%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I029 N over W Benson RD built?

It was built in 2002, making it 23 years old in 2025.

What condition is I029 N over W Benson RD 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 November 2023.

How much traffic does I029 N over W Benson RD carry?

About 23,855 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is I029 N over W Benson RD?

The structure is 208 ft (63.4 m) long with a longest span of 204 ft (62.2 m) and a deck 59 ft wide.

Who owns I029 N over W Benson RD?

It is owned by the State Highway Agency.