US Bridges

254th ST HWY 122 over Slip-Up Ck

Fair

Minnehaha County, South Dakota · 1.0S & 6.7W Garretson · Structure no. 000000050243100

Built
2015
10 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete Continuous
Length
61 ft
2 main spans
Daily traffic
736
2023 count
Owner
County
County Highway Agency

About this bridge

254th ST HWY 122 over Slip-Up Ck is a concrete continuous slab carrying 254th ST HWY 122 over Slip-Up Ck in Minnehaha County, South Dakota. It was built in 2015, so it is 10 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 736 vehicles a day, roughly 3% of them trucks, projected to reach 854 by 2038. The structure is 61 ft (18.5 m) long and 35 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Carries254th ST HWY 122
CrossesSlip-Up Ck
Location1.0S & 6.7W Garretson
RouteCounty Highway 0
Coordinates43.70321, -96.64497
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
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 rating78.3 US tons
Inventory rating60.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length61 ft (18.5 m)
Longest span30 ft (9 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic736 (2023)
Projected traffic854 by 2038
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$608,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 254th ST HWY 122 over Slip-Up Ck built?

It was built in 2015, making it 10 years old in 2025.

What condition is 254th ST HWY 122 over Slip-Up 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 Slip-Up Ck carry?

About 736 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is 254th ST HWY 122 over Slip-Up Ck?

The structure is 61 ft (18.5 m) long with a longest span of 30 ft (9 m) and a deck 35 ft wide.

Who owns 254th ST HWY 122 over Slip-Up Ck?

It is owned by the County Highway Agency.