US Bridges

Kentucky Pl. over Sulphur Ck

PoorClosed to traffic

Meade County, South Dakota · 9.7S & 2.8E Mud Butte · Structure no. 000000047377117

Built
1925
100 years old
Condition
Poor
inspected June 2021
Type
Stringer/Multi-beam or Girder
Steel
Length
51 ft
2 main spans
Daily traffic
30
2022 count
Owner
County
County Highway Agency

About this bridge

Kentucky Pl. over Sulphur Ck is a steel stringer/multi-beam or girder carrying Kentucky Pl. over Sulphur Ck in Meade County, South Dakota. It was built in 1925, so it is 100 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 1 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: closed to all traffic.

It carries about 30 vehicles a day, projected to reach 30 by 2042. The structure is 51 ft (15.6 m) long and 17 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesKentucky Pl.
CrossesSulphur Ck
Location9.7S & 2.8E Mud Butte
RouteCounty Highway 0
Coordinates44.86777, -102.82189
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure1 Imminent FailureMajor deterioration or section loss present in critical structural components. Bridge is closed to traffic but corrective action may put it back in light service.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2021
Inspection intervalevery 6 months
Operating statusClosed to all traffic
ScourUnknown foundation; not evaluated for scour
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating0 US tons
Inventory rating0 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans2
Design loadHS 20
Structure length51 ft (15.6 m)
Longest span30 ft (9.1 m)
Deck width17 ft (5.2 m)
Roadway width16 ft (5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2022)
Projected traffic30 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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$180,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Kentucky Pl. over Sulphur Ck built?

It was built in 1925, making it 100 years old in 2025.

What condition is Kentucky Pl. over Sulphur 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 June 2021.

How much traffic does Kentucky Pl. over Sulphur Ck carry?

About 30 vehicles per day (2022 count).

How long is Kentucky Pl. over Sulphur Ck?

The structure is 51 ft (15.6 m) long with a longest span of 30 ft (9.1 m) and a deck 17 ft wide.

Who owns Kentucky Pl. over Sulphur Ck?

It is owned by the County Highway Agency.