US Bridges

254th ST HWY 122 over Skunk Ck

Fair

Minnehaha County, South Dakota · 1.4 S & 0.8W Lyons · Structure no. 000000050122100

Built
1997
28 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete Continuous
Length
151 ft
4 main spans
Daily traffic
611
2022 count
Owner
County
County Highway Agency

About this bridge

254th ST HWY 122 over Skunk Ck is a concrete continuous slab carrying 254th ST HWY 122 over Skunk Ck in Minnehaha County, South Dakota. It was built in 1997, so it is 28 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 611 vehicles a day, roughly 3% of them trucks, projected to reach 800 by 2037. The structure is 151 ft (45.9 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries254th ST HWY 122
CrossesSkunk Ck
Location1.4 S & 0.8W Lyons
RouteCounty Highway 0
Coordinates43.70295, -96.88692
Functional classRural Minor Collector

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.7 US tons
Inventory rating48.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length151 ft (45.9 m)
Longest span41 ft (12.6 m)
Deck width33 ft (10 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic611 (2022)
Projected traffic800 by 2037
Trucks3%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.2 million (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 254th ST HWY 122 over Skunk Ck built?

It was built in 1997, making it 28 years old in 2025.

What condition is 254th ST HWY 122 over Skunk 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 June 2023.

How much traffic does 254th ST HWY 122 over Skunk Ck carry?

About 611 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 254th ST HWY 122 over Skunk Ck?

The structure is 151 ft (45.9 m) long with a longest span of 41 ft (12.6 m) and a deck 33 ft wide.

Who owns 254th ST HWY 122 over Skunk Ck?

It is owned by the County Highway Agency.