Drainage Districts

This layer was created for use by the Rock County Drainage Board to visualize and query drainage districts in Rock County. The boundaries are from a 2003 inventory conducted by Research Engineering Associates, Inc.本地理图层专为罗克县排水委员会（Rock County Drainage Board）打造，用于可视化展示并查询罗克县辖区内的排水区域。该图层的边界数据源自研究工程联合公司（Research Engineering Associates, Inc.）于2003年完成的普查工作。