Le Sueur County Public Drainage Inventory and Inspection for Water Quality Projects

The Le Sueur Soil and Water Conservation District (SWCD), who acts as County Ditch Inspectors, will partner with the Le Sueur County GIS Coordinator to accomplish the inventory and inspection of drainage ditches. A database will be established for all 250 miles of Le Sueur County Drainage Authority ditches. The inventory will be conducted using Lidar, 2010 and 2013 Pictometry and onsite technical review. Sites that have potential water quality issues will be identified from worst to most stable for side inlets, buffers and retention storage. The Treatment Train Effect will be utilized during this process to address priority sites. The project will include GIS-based analysis to identify where water quality based projects are needed. An inspection plan will be created from the gathered inventory data by the SWCD for utilization by the Drainage Inspectors and Drainage Authority to identify high priority sites for water quality improvements.