1. 2006 Governor’s Pollution Prevention Awards Bloomington, October 25, 2006 WATER SUPPLY PLANNING IN ILLINOIS Derek Winstanley Chief Illinois State Water Survey

2. CONTENTS Introduction Current planning and management of water supplies Executive Order 2006-01 Benefits of water supply planning Questions

3. INTRODUCTION

4. Fresh Water Use in Illinois 2000 and 2025 (mgd) 2000 2025 Public Supply1,6782,205 Self-Supplied Industries493547 Livestock and Irrigation3842 Thermoelectric13,27216,889 TOTAL15,79320,197 Source:SIU

5. THE WATER CYCLE: CLIMATE, SURFACE WATER, and GROUNDWATER ARE ALL LINKED

6. INDIANA ILLINOIS Meredosia Snicarte Valley City Lake Michigan s s i s s i p p i R i v e r I l l i n o i s R i v e r 10-Year Running Averages Watershed precipitation Illinois River streamflow at Meredosia/Valley City (minus Lake Michigan diversion) Groundwater elevation at Snicarte 39 40 38 15 16 14 37 36 35 34 33 32 31 447.0 447.5 448.0 448.5 449.0 30 13 12 11 10 9 8 7 6 19001910192019301940195019601970198019902000 10-year running averages of Illinois River watershed precipitation, streamflow (minus Lake Michigan diversion), and groundwater elevation.

7. BENEFITS Withdrawing water has benefits in supporting population growth and economic development COSTS Withdrawing water from rivers, lakes, reservoirs, and aquifers has costs. QUESTIONS What costs are we willing to accept in return for what benefits? How should we manage available water supplies? How should we deal with uncertainties and risks?

8. KEY QUESTIONS: How much water can be withdrawn safely from the aquifers and rivers and where? How much growth can be sustained? What will be the impacts of additional withdrawals on i) existing wells, ii) rivers and streams, and iii) the aquifers themselves? How resistant to drought and possible climate change are water supplies?

9. Surface Water Intakes (public water supply) Sand/gravel aquifers Bedrock aquifers IllinoisWater Resources

11. EAST-CENTRAL ILLINOIS Pekin Morton Peoria Normal Bloomington ` Havana Petersburg Springfield Lincoln Decatur Clinton Monticello Champaign Urbana Rantoul Paxton Hoopeston Watseka Danville TAZEWELL CO MASON CO CASS CO MENARD CO LOGAN CO WOODFORD CO MCLEAN CO DEWITT CO MACON CO PIATT CO CHAMPAIGN CO FORD CO IROQUOIS CO VERMILION CO MILES 081216204 NORTH

12. CURRENT MANAGEMENT OF WATER WITHDRAWALS Private ownership of land, but not of water. Need a permit to construct a pumping facility, but not to pump water. DNR/OWR may place restrictions on surface water permits in order to protect public waters. No limits to other withdrawals as long as they are for reasonable and beneficial use – Riparian Doctrine. Courts settle conflicts. 17 Water Authorities (13 in east-central Illinois). Currently a fragmented water supply planning process - little comprehensive, regional water supply planning. First come, first served. No mandatory reporting of water withdrawals.

13. GROUNDWATER WITHDRAWALS IN CHAMPAIGN COUNTY (mgd)

14. WE NEED TO STUDY LONG-TERM CUMULATIVE IMPACTS OF WITHDRAWALS Each additional withdrawal by itself may not have adverse impacts.

15. +2 mgd CUMULATIVE IMPACTS WITH +10 MGD THRESHOLD +4 mgd +6 mgd TOTAL +12 mgd

16. MANAGEMENT STRATEGIES TO CONSIDER LOCATION PRIORITIES ALLOCATION OF LIMITED ASSETS

17. “WATER FOR ILLINOIS: A PLAN FOR ACTION”

18. Executive Order 2006-01 for the Development of State and Regional Water-Supply Plans Issued by Governor on January 9, 2006 Calls for:  Development of a scientific basis & administrative framework;  Locally-based regional water supply planning committees;  3-year pilots, within existing laws, regulations, and property rights.

19. PRIORITY AQUIFERS and WATERSHEDS for WATER SUPPLY PLANNING

20. REGIONAL WATER SUPPLIES: PLANNING AND PLANS Determine water availability using existing data, new data (climate change; geologic maps; water levels; hydraulic properties) and develop analytical tools (models). Develop scenarios of water demand to 2050. Evaluate management options, including water conservation and reuse. Better able to answer questions posed. Update state drought plan. Cumulatively they can have adverse impacts

21. $80k Smith Family Jones Family C-U Savings & Loan Hospital/Insurance Coverage DO NOT ENTER

22. BENEFITS OF REGIONAL WATER SUPPLY PLANNING Achieve goals: “ Provide adequate and reliable supplies of clean water at reasonable cost.” Reduce conflicts Provide basis for sustainable development

23. ILLINOIS STATE WATER SURVEY http://www.sws.uiuc.edu dwinstan@uiuc.edu 217-244 5459