Next week is Soil and Water Conservation Week. Soil and water conservation efforts do have an impact on our area. Lake Red Rock drains nearly a quarter of Iowa and even some parts of Minnesota, and as a result it collects sediment from the farmlands that drain into it. Assistant Manager of Operations at Lake Red Rock John Holt says sedimentation of the Lake can have effects on wildlife and recreation, but the reservoir was designed to hold sediment. However, the sediment can block potential food sources for fish.