US Bridges

488th Avenue over Split Rock Creek

Fair

Minnehaha County, South Dakota · 1E & 0.2S Sherman · Structure no. 000000050340062

Built
1974
51 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
42 ft
2 main spans
Daily traffic
20
2022 count
Owner
County
County Highway Agency

About this bridge

488th Avenue over Split Rock Creek is a steel stringer/multi-beam or girder carrying 488th Avenue over Split Rock Creek in Minnehaha County, South Dakota. It was built in 1974, so it is 51 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 fair condition with a lowest component rating of 5 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 20 vehicles a day, roughly 2% of them trucks, projected to reach 25 by 2037. The structure is 42 ft (12.8 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries488th Avenue
CrossesSplit Rock Creek
Location1E & 0.2S Sherman
RouteCounty Highway 0
CountyMinnehaha County
StateSouth Dakota
Coordinates43.76093, -96.45329
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating80.7 US tons
Inventory rating48.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length42 ft (12.8 m)
Longest span20 ft (6.2 m)
Deck width24 ft (7.2 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2022)
Projected traffic25 by 2037
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$497,000 (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 488th Avenue over Split Rock Creek built?

It was built in 1974, making it 51 years old in 2025.

What condition is 488th Avenue 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 July 2024.

How much traffic does 488th Avenue over Split Rock Creek carry?

About 20 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 488th Avenue over Split Rock Creek?

The structure is 42 ft (12.8 m) long with a longest span of 20 ft (6.2 m) and a deck 24 ft wide.

Who owns 488th Avenue over Split Rock Creek?

It is owned by the County Highway Agency.