US Bridges

W. Oral Road over Angostura Main Canal

FairPosted for load

Fall River County, South Dakota · 3S & 6W Oral · Structure no. 000000024338080

Built
1974
51 years old, rebuilt 2002
Condition
Fair
inspected May 2024
Type
Tee Beam
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
500
2022 count
Owner
County
County Highway Agency

About this bridge

W. Oral Road over Angostura Main Canal is a prestressed concrete tee beam carrying W. Oral Road over Angostura Main Canal in Fall River County, South Dakota. It was built in 1974 and reconstructed in 2002, so it is 51 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 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. Its operating status is: posted for load restriction.

It carries about 500 vehicles a day, roughly 3% of them trucks, projected to reach 500 by 2032. The structure is 50 ft (15.2 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesW. Oral Road
CrossesAngostura Main Canal
Location3S & 6W Oral
RouteCounty Highway 0
Coordinates43.36155, -103.38522
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating30.6 US tons
Inventory rating16.5 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span49 ft (14.9 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2022)
Projected traffic500 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 W. Oral Road over Angostura Main Canal built?

It was built in 1974, making it 51 years old in 2025. It was reconstructed in 2002.

What condition is W. Oral Road over Angostura Main Canal 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 W. Oral Road over Angostura Main Canal carry?

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

How long is W. Oral Road over Angostura Main Canal?

The structure is 50 ft (15.2 m) long with a longest span of 49 ft (14.9 m) and a deck 31 ft wide.

Who owns W. Oral Road over Angostura Main Canal?

It is owned by the County Highway Agency.