1. Minnesota Hydrography Land of 10,000 Lakes (or so) Mark Olsen Minnesota Pollution Control Agency 520 Lafayette Road N. St. Paul, MN 55155 mark.olsen@pca.state.mn.us Presented by:

2. A Matter of Scale 11,842 Lakes > 10 acres Over 14,000 when including smaller lakes 92,000 miles of stream/river

3. Growing Public Interest/Concern Water quality is highest priority concern Environmental Issues –Malformed frogs –Nitrates in Groundwater –Fish kills and consumption advisories –Recreational usage –Hypoxia Use of local data Access to data and information

6. Minnesota’s Governor’s Council on Geographic Information Hydrography Committee Inventory and state coordination Define the MN hydrography framework Coordination with Federal activities

7. Inventory and State Coordination Legacy systems –25 years of history –Defacto standards Distributed authority –Relies on voluntary cooperation

8. Define MN Framework Basic features Watershed Basin Watercourse Hydrologic Point of Interest Basic elements Definition Delineation Identification Association of events

9. The Need to Share Watershed approach –Environmental issues ignore political boundaries Shared responsibility and authority

10. St. Croix River Basin:

11. The Need to Share Watershed approach –Environmental issues ignore political boundaries Shared responsibility and authority –Example: Lakefinder Single point of access for DNR, MPCA, and MDH data

12. WWW.DNR.STATE.MN.US/LAKEFIND/INDEX.HTML

13. Dept of Health - Fish Consumption Advisories

14. MPCA - Water Quality Data

15. MPCA - Water Clarity Data

16. DNR - Recreational Use

17. DNR - Topographic Map

18. MPCA Activities Hydrography dataset is framework for integration –Standards “Perch Creek: T.116, 117, 118, R.39” –Monitoring (STORET) –Permitted dischargers –Assessments (305(b), 303(d)) –Funding activities

19. Reach Indexing Tool Why We Like It: No cost Ease of use Activities associated to real surface water features - not dependent on locational accuracy or scale

20. St. Croix River Basin - Indexed Stream Standards

21. Flow validated data needed to populate missing lake reach IDs

22. Reach Indexed 305(b) Assessment

23. Higher Resolution Data DNR “Level 1” Hydro - 24K –DLG with lake shorelines from NWI –MPCA funded USGS to research conversion to NHD Integration of Wisconsin data –Ready now to add ID’s and names NHD delineation rules Technical coordination with USGS

24. This is the End.