US Bridges

Mchardy Road over Split Rock Creek

Fair

Minnehaha County, South Dakota · 0.1E & 0.5S of Brandon · Structure no. 000000050281180

Built
1986
39 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
182 ft
3 main spans
Daily traffic
60
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Mchardy Road over Split Rock Creek is a steel continuous stringer/multi-beam or girder carrying Mchardy Road over Split Rock Creek in Minnehaha County, South Dakota. It was built in 1986, so it is 39 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 60 vehicles a day, roughly 2% of them trucks, projected to reach 60 by 2032. The structure is 182 ft (55.5 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesMchardy Road
CrossesSplit Rock Creek
Location0.1E & 0.5S of Brandon
RouteCity Street 0
CountyMinnehaha County
StateSouth Dakota
Coordinates43.58595, -96.56689
Functional classUrban 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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating30.5 US tons
Inventory rating21.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length182 ft (55.5 m)
Longest span68 ft (20.7 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deck16 ft (4.9 m)

Traffic and service

Average daily traffic60 (2022)
Projected traffic60 by 2032
Trucks2%
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

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Mchardy Road over Split Rock Creek built?

It was built in 1986, making it 39 years old in 2025.

What condition is Mchardy Road over Split Rock Creek 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 August 2024.

How much traffic does Mchardy Road over Split Rock Creek carry?

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

How long is Mchardy Road over Split Rock Creek?

The structure is 182 ft (55.5 m) long with a longest span of 68 ft (20.7 m) and a deck 35 ft wide.

Who owns Mchardy Road over Split Rock Creek?

It is owned by the Town or Township Highway Agency.