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Public Meeting Sand Coulee Public Water Supply System Restoration February 20, 2013

Public Meeting Sand Coulee Public Water Supply System Restoration February 20, 2013. Introductions. DEQ Abandoned Mine Lands Program (DEQ-AML) Hydrometrics, Inc NCI Engineering. DEQ Abandoned Mine Lands Reclamation. Photo taken August 15, 2012. DEQ-AML Clogged Streams Project

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Public Meeting Sand Coulee Public Water Supply System Restoration February 20, 2013

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  1. Public Meeting Sand Coulee Public Water Supply System Restoration February 20, 2013

  2. Introductions • DEQ Abandoned Mine Lands Program (DEQ-AML) • Hydrometrics, Inc • NCI Engineering

  3. DEQ Abandoned Mine Lands Reclamation Photo taken August 15, 2012

  4. DEQ-AML Clogged Streams Project Cleared mine precipitates from 6 miles of Sand Coulee and Cottonwood Creeks: Summer 2012

  5. Nelson #2 Sand Coulee Well Field Rusty Ditch Gerber Mine Sand Coulee Mine Stockett #5 Abandoned coal mines near Sand Coulee Stockett #7 Nelson #1 ACM #4 Carbon Mine Stockett #4

  6. Sand Coulee Water SystemCoal Mining Impacts • DEQ-AML informed of impacts to Sand Coulee Water District during development of the Preliminary Engineering Report (NCI, 2010) • Coal mines dewater the Kootenai sandstone which supplies the SCWD wells: average 60 gallons per minute discharge to Rusty Ditch • Coal enters the water distribution system, likely during the repair of line breaks: 2011 Legislature testimony

  7. Sand Coulee Water SystemRestoration Project • Develop reliable source of potable water • Eliminate cycle of well drilling-water shortages-well drilling • Develop necessary water rights for SCWD • Replace water distribution system including storage tank

  8. DEQ-AML Water Supply Work • Water rights, water availability, and water quality investigations: 2010 to 2012 • Drilled and tested new 785 foot well into the Madison limestone: summer 2012 • Testing indicates excellent productivity and water quality • Obtained additional 10 acre foot water right • Developing additional water rights in the Madison Limestone

  9. Existing Kootenai wells

  10. Replace with two Madison wells

  11. SCWD Well #5 April –June 2012

  12. Sand Coulee Water Distribution System • Impacted by coal • Over 50 years old • High maintenance • Undersized lines and tank • Unmetered • Non-compliant with current regulations

  13. Distribution System Design Objectives • Meet fire flow requirements • Eliminate entry of coal into system • Meet current design, materials, and operation specifications • Looped geometry where feasible • Adequate valving and fire hydrants • Workable system for SCWD

  14. Implementation Objectives Minimize disruption of water supply – use temporary water delivery network Minimize disruption to property – connect to existing private service lines Maintain water connections for all existing users Provide service stubs for new users within SCWD

  15. Tank Foundation Investigation

  16. Waterline Route Soils Investigation COAL COAL

  17. Proposed System Layout: West

  18. Proposed System Layout: Central

  19. Proposed System Layout: East

  20. Proposed Well Field Layout

  21. Projected 2012 Work • Complete private property surveys • Survey properties adjoining the waterline location • Obtain consent of entry from land owners • Develop waterline easements for the Sand Coulee Water District • Develop final system design, specifications and bid documents

  22. Comments • Official comments must be submitted in writing to: MDEQ Remediation Division Attn: Tom Henderson PO Box 200901 Helena, MT 59620 Or Email: thenderson@mt.gov Tom Henderson, MDEQ Project Manager Phone (406) 841-5052

  23. Comment Period • February 20 through March 20, 2013

  24. Project Documents • Documents available online at: http://deq.mt.gov/AbandonedMines/CurrentProjects.mcpx • Project name is Sand Coulee Water Supply Restoration • Copies of all documents available at MDEQ, 1100 North Last Chance Gulch in Helena

  25. Questions Contact: Tom Henderson Montana DEQ thenderson@mt.gov (406) 841-5052

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