US Bridges

Mail RD over Owl Ck

Fair

Butte County, South Dakota · 8.0W 0.2N Newell · Structure no. 000000010230338

Built
1978
47 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
47
2022 count
Owner
County
County Highway Agency

About this bridge

Mail RD over Owl Ck is a prestressed concrete tee beam carrying Mail RD over Owl Ck in Butte County, South Dakota. It was built in 1978, so it is 47 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 5 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 47 vehicles a day, roughly 2% of them trucks, projected to reach 50 by 2042. The structure is 40 ft (12.2 m) long and 23 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesMail RD
CrossesOwl Ck
Location8.0W 0.2N Newell
RouteCounty Highway 0
Coordinates44.72098, -103.58808
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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span39 ft (11.9 m)
Deck width23 ft (7 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic47 (2022)
Projected traffic50 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Mail RD over Owl Ck built?

It was built in 1978, making it 47 years old in 2025.

What condition is Mail RD over Owl Ck 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 August 2024.

How much traffic does Mail RD over Owl Ck carry?

About 47 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Mail RD over Owl Ck?

The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.9 m) and a deck 23 ft wide.

Who owns Mail RD over Owl Ck?

It is owned by the County Highway Agency.