US Bridges

Liberty Blvd. over I090

Fair

Pennington County, South Dakota · Exit 67 · Structure no. 000000052500275

Built
2002
23 years old
Condition
Fair
inspected December 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
250 ft
2 main spans
Daily traffic
7,957
2023 count
Owner
State
State Highway Agency

About this bridge

Liberty Blvd. over I090 is a prestressed concrete stringer/multi-beam or girder carrying Liberty Blvd. over I090 in Pennington 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 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.

It carries about 7,957 vehicles a day, roughly 3% of them trucks, projected to reach 9,490 by 2043. The structure is 250 ft (76.2 m) long and 63 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesLiberty Blvd.
CrossesI090
LocationExit 67
RouteCounty Highway 0
CountyPennington County
StateSouth Dakota
Coordinates44.11824, -103.0507
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.
Last inspectionDecember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.6 US tons
Inventory rating45.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length250 ft (76.2 m)
Longest span127 ft (38.7 m)
Deck width63 ft (19.1 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,957 (2023)
Projected traffic9,490 by 2043
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 Liberty Blvd. over I090 built?

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

What condition is Liberty Blvd. over I090 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 December 2022.

How much traffic does Liberty Blvd. over I090 carry?

About 7,957 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Liberty Blvd. over I090?

The structure is 250 ft (76.2 m) long with a longest span of 127 ft (38.7 m) and a deck 63 ft wide.

Who owns Liberty Blvd. over I090?

It is owned by the State Highway Agency.