US Bridges

38840 278 ST over Andes Ck

PoorPosted for load

Douglas County, South Dakota · 2.0N & 3.6W of Armour · Structure no. 000000022144100

Built
1972
53 years old
Condition
Poor
inspected July 2023
Type
Tee Beam
Concrete
Length
25 ft
1 main span
Daily traffic
30
2022 count
Owner
County
County Highway Agency

About this bridge

38840 278 ST over Andes Ck is a concrete tee beam carrying 38840 278 ST over Andes Ck in Douglas County, South Dakota. It was built in 1972, so it is 53 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. Its operating status is: posted for load restriction.

It carries about 30 vehicles a day, roughly 2% of them trucks, projected to reach 30 by 2032. The structure is 25 ft (7.6 m) long and 26 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Carries38840 278 ST
CrossesAndes Ck
Location2.0N & 3.6W of Armour
RouteCounty Highway 0
Coordinates43.35629, -98.41531
Functional classRural Local

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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22.3 US tons
Inventory rating11.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span24 ft (7.3 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2022)
Projected traffic30 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$25,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 38840 278 ST over Andes Ck built?

It was built in 1972, making it 53 years old in 2025.

What condition is 38840 278 ST over Andes 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 2023.

How much traffic does 38840 278 ST over Andes Ck carry?

About 30 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 38840 278 ST over Andes Ck?

The structure is 25 ft (7.6 m) long with a longest span of 24 ft (7.3 m) and a deck 26 ft wide.

Who owns 38840 278 ST over Andes Ck?

It is owned by the County Highway Agency.