US Bridges

Shady Road over Irrigation Ditch

Fair

Fall River County, South Dakota · 1.9S & 0.7W of Oral · Structure no. 000000024390069

Built
1987
38 years old
Condition
Fair
inspected May 2024
Type
Tee Beam
Prestressed Concrete
Length
32 ft
1 main span
Daily traffic
20
2022 count
Owner
County
County Highway Agency

About this bridge

Shady Road over Irrigation Ditch is a prestressed concrete tee beam carrying Shady Road over Irrigation Ditch in Fall River County, South Dakota. It was built in 1987, so it is 38 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 20 vehicles a day, roughly 2% of them trucks, projected to reach 20 by 2032. The structure is 32 ft (9.8 m) long and 23 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesShady Road
CrossesIrrigation Ditch
Location1.9S & 0.7W of Oral
RouteCounty Highway 0
CountyFall River County
StateSouth Dakota
Coordinates43.37802, -103.28292
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span31 ft (9.4 m)
Deck width23 ft (7 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2022)
Projected traffic20 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Shady Road over Irrigation Ditch built?

It was built in 1987, making it 38 years old in 2025.

What condition is Shady Road over Irrigation Ditch 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 May 2024.

How much traffic does Shady Road over Irrigation Ditch carry?

About 20 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Shady Road over Irrigation Ditch?

The structure is 32 ft (9.8 m) long with a longest span of 31 ft (9.4 m) and a deck 23 ft wide.

Who owns Shady Road over Irrigation Ditch?

It is owned by the County Highway Agency.