1. Red Lake River Farm to Stream Tile Drainage Study - Red Lake Watershed District –

2. Project Background

3. Theories

4. Water Quality Comparisons

7. Thief River Watershed Marshall/Beltrami Co. Project Area

8. Marshall County Sites

9. Red Lake Co. Project Area Wild Rice Paddy Monitoring Clearwater River Watershed

10. Red Lake County Sites

11. Clearwater County (Wild Rice) Sites

12. Tile Water Quality Findings Conventional Agriculture

13. Tile Outlet Comparisons

14. Marshall Co. Gravity Tile Red Lake Co. Gravity Tile Marshall Co. Pumped Tile Natural Background

15. Surface Drainage Water Quality

16. Surface Versus Tile Conventional Ag AVERAGES SurfaceTile Total Phosphorus (mg/L)0.87.02 Total Suspended Solids (mg/L)124.921.96 Nitrates (mg/L)2.5721.31 Total Nitrogen (mg/L)5.6122.36 Turbidity (NTU)149.58.71

17. Drainage vs. Natural Background Levels - Comparable or Better -

18. Drainage vs. Natural Background Levels - Cause for Concern -

19. Wild Rice Paddy Water Quality Results

21. VS. Sfc. ML Tile

22. Wild Rice Main Line Tile Win–Win Solution

23. Wild Rice Paddy Sfc. Drainage Impact on the Clearwater River

25. Wild Rice Paddy Results – Impact on Clearwater River

27. FLOW

28. Flow Comparison Theories Being Tested

29. How is flow measured?

32. Peak Flows

33. More Information More Questions

34. Future Plans

35. Questions? More information is available on the RLWD website: http://www.redlakewatershed.org/projects.html#RLWFTSTile Corey Hanson coreyh@wiktel.com 218-681-5800