US Bridges

Jefferson Road over Trib. to Dry Choteau Ck

PoorPosted for load

Bon Homme County, South Dakota · 0.4N of Avon · Structure no. 000000005054106

Built
1945
80 years old
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
26 ft
1 main span
Daily traffic
60
2022 count
Owner
County
County Highway Agency

About this bridge

Jefferson Road over Trib. to Dry Choteau Ck is a concrete stringer/multi-beam or girder carrying Jefferson Road over Trib. to Dry Choteau Ck in Bon Homme County, South Dakota. It was built in 1945, so it is 80 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 3 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 60 vehicles a day, roughly 2% of them trucks, projected to reach 60 by 2032. The structure is 26 ft (7.9 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesJefferson Road
CrossesTrib. to Dry Choteau Ck
Location0.4N of Avon
RouteCounty Highway 0
Coordinates43.01671, -98.06057
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating3 US tons
Inventory rating3 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span24 ft (7.3 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2022)
Projected traffic60 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$446,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Jefferson Road over Trib. to Dry Choteau Ck built?

It was built in 1945, making it 80 years old in 2025.

What condition is Jefferson Road over Trib. to Dry Choteau 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 2024.

How much traffic does Jefferson Road over Trib. to Dry Choteau Ck carry?

About 60 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Jefferson Road over Trib. to Dry Choteau Ck?

The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.3 m) and a deck 22 ft wide.

Who owns Jefferson Road over Trib. to Dry Choteau Ck?

It is owned by the County Highway Agency.