1. Public Information Meeting Wastewater Treatment January 26, 2016

2. History First Public Hearing On August 16, 2010

3. Hearing Discussion Items: Sanitary Sewer Collection: – Reduce Infiltration & Inflow – Goal to Eliminate Sewage Backups into Homes – Goal to Eliminate By-Pass Pumping into the Lake

4. Hearing Discussion Items: Wastewater Treatment: – Bring the Facility into Compliance with the NPDES Permit Hydraulically Overloaded Organic Loading Issues 25 Permit Violation in the Past 10-years

5. Hearing Discussion Items: Lift Station Needs: – 4 th Avenue Lift Station is Undersized – Box Elder Street Lift Station is Undersized – Add Alarms and Telemetry

6. Hearing Discussion Items: Storm Sewer Needs: – Eliminate Flooding by the High School Eliminating Flooding Helps to Reduce Sanitary Sewer I & I

7. Hearing Discussion Items: Water Distribution System: – Water Distribution System Improvements Coincide with Sanitary Sewer Collection System Needs

8. Hearing Discussion Items: Water Supply: – Add more Wells to Provide a Firm Water Supply

9. Hearing Discussion Items: Cost for the Improvements – $17,000,000 to $20,000,000

10. Hearing Discussion Items: Council Sets Priority – Eliminate Sewage Backups into Homes is the First Priority – Addressing the WWTF Deficiencies is the Second Priority

11. Hearing Discussion Items: What Has Been Done – 2012 Infrastructure Improvements – 2015 Well No. 7

12. 2012-2013 Infrastructure Improvements City of Mountain Lake, Minnesota

14. Wastewater Flow Date (Apr 2012 – Oct 2015)

15. Wastewater Flow Date (Pre-Post 2012 Project)

16. Wastewater Flow Date (Apr 2012 – Oct 2015)

17. Average Daily Flow 2005 – 2009 = 0.334 MGD 2012 – Present = 0.353 MGD Why the Increase? – Change at the Water Treatment Plant Lost the Opportunity to Surface Discharge RO Reject Water

18. Existing Wastewater Treatment Facility Constructed in 1957 39 Acre Primary Pond 13.3 Acre Middle Pond 12 Acre Secondary Pond Controlled Discharge to the Watonwan River Clay Liner 3,500 gallons/acre/day Allowable Seepage Rate 1’ to 3’ Operating Range Permitted Treatment Capacity – 180-day AWW Flow of 350,000 gpd – 800 lbs/day Average BOD Loading

19. Treatment Facility Upgrade Options New Mechanical WWTF New Stabilization Pond WWTF Add New Primary Pond & Rehab Existing Add New Aerated Primary Pond & Rehab Existing

20. Design Parameter for Mechanical WWTF Avg. Dry Weather Flow 440,000 gpd 30 Day Avg. Wet Weather Flow 970,000 gpd Peak Hourly Wet Weather Flow1,746,000 gpd Peak Instant Wet Weather Flow1,946,000 gpd Average CBOD 1,054 lb/day Average TSS 1,019 lb/day Average TKN143 lb/day Average Phosphorus 43 lb/day

21. Design Parameters for Stabilization Pond WWTF 210-Day Ave. Wet Weather Flow474,000 gpd – May through November – November through May Average CBOD1,054 lb/day

22. Mechanical WWTF

23. Stabilization Pond WWFT

24. Mechanical WWTF Approximate Land Need (Acres)5 Estimated Capital Cost$12,470,200 Annualized Capital Cost 2% Interest over 30 Years $556,793 Estimated Annual O&M Cost, Less Debt$505,860 Existing Annual Debt Service$530,010 Estimated Annual Short Term Reserves$22,500 Total Estimated Annual Cost$1,615,163

25. New Stabilization Pond WWTF Approximate Land Need (Acres)130 Estimated Capital Cost$16,205,900 Annualized Capital Cost 2% Interest over 30 Years $723,592 Estimated Annual O&M Cost, Less Debt$322,490 Existing Annual Debt Service$530,010 Estimated Annual Short Term Reserves$2,500 Total Estimated Annual Cost$1,578,592

26. New Primary Pond & Rehab Existing Approximate Land Need (Acres)90 Estimated Capital Cost$15,037,000 Annualized Capital Cost 2% Interest over 30 Years $671,400 Estimated Annual O&M Cost, Less Debt$322,490 Existing Annual Debt Service$530,010 Estimated Annual Short Term Reserves$2,500 Total Estimated Annual Cost$1,526,400

27. New Aerated Primary Pond & Rehab Existing Approximate Land Need (Acres)50 Estimated Capital Cost$11,428,000 Annualized Capital Cost 2% Interest over 30 Years $510,260 Estimated Annual O&M Cost, Less Debt$362,260 Existing Annual Debt Service$530,010 Estimated Annual Short Term Reserves$6,500 Total Estimated Annual Cost$1,409,030

28. Preferred Alternative New Aerated Primary Pond and Rehab Existing Ponds

29. Affordability Approximately 826 Service Connections Approximately 1,643 Equivalent Residential Units Annual Cost Per ERU = $860/Year Monthly Cost Per ERU = $72/Month

30. Possible Funding Partnership Public Facilities Authority (PFA) Ranked 12 th on Project Priority List 83 Priority Points Listed on the Governor’s January 2016 Plan to Modernize Aging Infrastructure

31. Project Schedule CurrentLand Acquisition Spring–Summer 2016Formalize Funding with PFA Summer-Winter 2016Project Design Spring 2017Bid Project Summer 2017-2018Construction of New Primary Pond Fall 2019Complete Rehab of Existing Ponds

32. Wastewater Treatment Need Questions and Comments from the Public