US Bridges

I-90 Service Road over Crow Ck

Poor

Lawrence County, South Dakota · 1.5 E Wy State Line · Structure no. 000000041015040

Built
1940
85 years old
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
62 ft
1 main span
Daily traffic
1,500
2022 count
Owner
County
County Highway Agency

About this bridge

I-90 Service Road over Crow Ck is a steel stringer/multi-beam or girder carrying I-90 Service Road over Crow Ck in Lawrence County, South Dakota. It was built in 1940, so it is 85 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,500 vehicles a day, roughly 3% of them trucks, projected to reach 1,500 by 2032. The structure is 62 ft (18.9 m) long and 33 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

CarriesI-90 Service Road
CrossesCrow Ck
Location1.5 E Wy State Line
RouteCounty Highway 0
Coordinates44.54678, -104.02236
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating29.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length62 ft (18.9 m)
Longest span60 ft (18.3 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2022)
Projected traffic1,500 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 I-90 Service Road over Crow Ck built?

It was built in 1940, making it 85 years old in 2025.

What condition is I-90 Service Road over Crow Ck in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does I-90 Service Road over Crow Ck carry?

About 1,500 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is I-90 Service Road over Crow Ck?

The structure is 62 ft (18.9 m) long with a longest span of 60 ft (18.3 m) and a deck 33 ft wide.

Who owns I-90 Service Road over Crow Ck?

It is owned by the County Highway Agency.