US Bridges

273 ST over Plum Ck

Fair

Hutchinson County, South Dakota · 1.6E & 2N of Milltown · Structure no. 000000034172050

Built
1982
43 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
24 ft
1 main span
Daily traffic
35
2022 count
Owner
County
County Highway Agency

About this bridge

273 ST over Plum Ck is a wood or timber stringer/multi-beam or girder carrying 273 ST over Plum Ck in Hutchinson County, South Dakota. It was built in 1982, so it is 43 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 6 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 35 vehicles a day, roughly 3% of them trucks, projected to reach 41 by 2040. The structure is 24 ft (7.3 m) long and 24 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Carries273 ST
CrossesPlum Ck
Location1.6E & 2N of Milltown
RouteCounty Highway 0
Coordinates43.42861, -97.77323
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
Deck7 GoodSome minor problems.
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 statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating56.5 US tons
Inventory rating40.3 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span22 ft (6.8 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic35 (2022)
Projected traffic41 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 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 273 ST over Plum Ck built?

It was built in 1982, making it 43 years old in 2025.

What condition is 273 ST over Plum 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 May 2024.

How much traffic does 273 ST over Plum Ck carry?

About 35 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 273 ST over Plum Ck?

The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.8 m) and a deck 24 ft wide.

Who owns 273 ST over Plum Ck?

It is owned by the County Highway Agency.