Fox Run Subdivision	Majestic Bluffs Retirement Community	Willow Ridge Subdivision

---

Willow Ridge Subdivision Development Project

Yankton, South Dakota

West Wind Corporation was in the process of planning for the development of a new housing subdivision on the north edge of Yankton, South Dakota, when Eisenbraun and Associates was selected to provide engineering expertise for the new development to be known as Willow Ridge. Eisenbraun and Associates provided a wide variety of surveying and engineering services ranging from boundary plats and a detailed topographic survey of the development, to a comprehensive design for the project. Detailed survey information was used to optimize lot layout, street design, and utility design. This information was also utilized in the development of the Willow Ridge Drainage Study (an E/A Storm Drainage project). This study utilized TR-55 Urban Hydrology to assess the impact that the Willow Ridge Development would have on area storm water flows. The residential development portion of the Willow Ridge Subdivision Project has included approximately 300 acres of the 1200 acres in the Willow Ridge land holding.

The work to date has been accomplished in three phases. Design for these areas encompassed earthwork, underground infrastructure, and roadway paving. E/A coordinated bidding and construction administration for all three projects. The first two projects were done through direct negotiations with local contractors. The third project, Willow Ridge North, received both state and federal funding. This was a public project that required competitive bidding. E/A provided all facets of engineering, including design, construction staking, and construction administration for the Owner. Willow Ridge continues its growth today, and all within the appropriate civil infrastructure as designed by E/A. permit, site and effluent treatment design, and construction compliance certification. This innovative project design featured the use of recovered undigested grain for re-feeding to livestock and a two-stage aerated treatment system to recycle flush water through the confinement barns. The screening and water treatment process reduces both odor and the acreage required for land application.