Located in the fastest growing community in South Dakota. 229 Single Family homes to be built in Creekside. In addition, there will be 37 villas and 47 townhome units for sale within the development. Just north of the intersection of Cliff Ave. & Willow Street in Harrisburg, SD. 2020 Cars Per Day: Willow Street: 5,591 | Cliff Avenue: 4,924. Area neighbors include: B&G Milkyway, Fareway, Ace Hardware, Sanford Health, Lewis Drug, Harrisburg Family Dental, Edward Jones, Evolve Chiropractic, RightQuote, Serenity Nail Spa.