US Bridges

39610 281 ST over Choteau Ck

Good

Douglas County, South Dakota · 0.5S & 4.1E of Armour · Structure no. 000000022221130

Built
1977
48 years old
Condition
Good
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
77
2022 count
Owner
County
County Highway Agency

About this bridge

39610 281 ST over Choteau Ck is a prestressed concrete tee beam carrying 39610 281 ST over Choteau Ck in Douglas County, South Dakota. It was built in 1977, so it is 48 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 77 vehicles a day, roughly 2% of them trucks, projected to reach 77 by 2032. The structure is 40 ft (12.2 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries39610 281 ST
CrossesChoteau Ck
Location0.5S & 4.1E of Armour
RouteCounty Highway 0
Coordinates43.31126, -98.26621
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
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 loadHS 20
Structure length40 ft (12.2 m)
Longest span38 ft (11.7 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic77 (2022)
Projected traffic77 by 2032
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$25,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 39610 281 ST over Choteau Ck built?

It was built in 1977, making it 48 years old in 2025.

What condition is 39610 281 ST over Choteau Ck in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does 39610 281 ST over Choteau Ck carry?

About 77 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 39610 281 ST over Choteau Ck?

The structure is 40 ft (12.2 m) long with a longest span of 38 ft (11.7 m) and a deck 31 ft wide.

Who owns 39610 281 ST over Choteau Ck?

It is owned by the County Highway Agency.