US Bridges

I090 WB Off Ramp over Blackhawk Ck

Good

Meade County, South Dakota · 1.0 NW Penn CO Line · Structure no. 000000047137612

Built
2008
17 years old
Condition
Good
inspected December 2022
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
2,993
2023 count
Owner
State
State Highway Agency

About this bridge

I090 WB Off Ramp over Blackhawk Ck is a concrete continuous culvert carrying I090 WB Off Ramp over Blackhawk Ck in Meade County, South Dakota. It was built in 2008, so it is 17 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,993 vehicles a day, roughly 10% of them trucks, projected to reach 4,723 by 2043. The structure is 21 ft (6.4 m) long.

CarriesI090 WB Off Ramp
CrossesBlackhawk Ck
Location1.0 NW Penn CO Line
RouteInterstate 90
Coordinates44.15324, -103.30071
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
Channel and channel protection9 ExcellentNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionDecember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating110.1 US tons
Inventory rating109.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length21 ft (6.4 m)
Longest span10 ft (3.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,993 (2023)
Projected traffic4,723 by 2043
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 I090 WB Off Ramp over Blackhawk Ck built?

It was built in 2008, making it 17 years old in 2025.

What condition is I090 WB Off Ramp over Blackhawk 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 December 2022.

How much traffic does I090 WB Off Ramp over Blackhawk Ck carry?

About 2,993 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is I090 WB Off Ramp over Blackhawk Ck?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3.1 m).

Who owns I090 WB Off Ramp over Blackhawk Ck?

It is owned by the State Highway Agency.