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PINEY POINT WATER MANAGEMENT TOWARDS CLOSURE

FDEP. Ardaman & Associates. Geotechnical, Environmental and Materials Consultants. Agency on Bay Management. PINEY POINT WATER MANAGEMENT TOWARDS CLOSURE. by Nadim F. Fuleihan, Sc.D., P.E. 160 MGal/yr Net Addition. 600 MGal + Ponded Process Water. WATER MANAGEMENT CHALLENGE.

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PINEY POINT WATER MANAGEMENT TOWARDS CLOSURE

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  1. FDEP Ardaman & Associates Geotechnical, Environmental and Materials Consultants Agency on Bay Management PINEY POINT WATER MANAGEMENT TOWARDS CLOSURE by Nadim F. Fuleihan, Sc.D., P.E.

  2. 160 MGal/yr Net Addition 600 MGal + Ponded Process Water WATER MANAGEMENT CHALLENGE • 600 MGal of Ponded Process Water • 600 MGal of Drainable Pore Water • 160 MGal Added Each Year (Assuming Normal Rainfall) 600 MGal + Drainable Pore Water • Extra 12.5 MGal Added for Each Inch of Rain Above Normal

  3. AVAILABLE SURGE STORAGE CAPACITY

  4. WATER CONSUMPTION

  5. EXISTING CONDITIONS PINEY POINT GYPSUM STACK CLOSURE NORTH COOLING POND OR DAP POND (NCP) NEW GYPSUM STACK-NORTH (NGS-N) NEW GYPSUM STACK-SOUTH (NGS-S) OLD GYPSUM STACK-NORTH (OGS-N) SOUTH COOLING POND NORTH COMPARTMENT (SCP-N) OLD GYPSUM STACK-SOUTH (OGS-S) SOUTH COOLING POND SOUTH COMPARTMENT (SCP-S)

  6. CONVENTIONAL GYPSUM STACK CLOSURE 1. Top Gradient Cover Soil Cover 40-mil HDPE GYPSUM 2. Slope Cover Amended Gypsum 1.0 2.5 GYPSUM

  7. ALTERNATIVE CLOSURE - LINED RESERVOIR 1. Interim Use - Process Water Storage 80-mil HDPE Process Water 2. Long Term Use – Fresh Water Reservoir 80-mil HDPE Soil Cover Fresh Water

  8. NGS-N CLOSURE PLAN AVAILABLE STORAGE 125 MGal LINED STORAGE 270 MGal RAISED DIKES OLD GYPSUM STACK-NORTH (OGS-N) SEEPAGE COLLECTION DITCH RELIEF DITCH HDPE LINER NEW GYPSUM STACK-NORTH (NGS-N) NORTH-SOUTH CROSS SECTION

  9. ULTIMATE CLOSURE OF SEEPAGE COLLECTION DITCH HDPE LINER HDPE LINER GEOTEXTILE GRAVEL DRAIN COLLECTOR PIPE SEEPAGE COLLECTION DITCH BERMUDA GRASS RUNOFF GYPSUM

  10. CLOSURE STAGE 1NOVEMBER 2003DEWATER NEW GYPSUM STACK-NORTH (NGS-N) PINEY POINT GYPSUM STACK CLOSURE NORTH COOLING POND OR DAP POND (NCP) NEW GYPSUM STACK-NORTH (NGS-N) NEW GYPSUM STACK-SOUTH (NGS-S) OLD GYPSUM STACK-NORTH (OGS-N) SOUTH COOLING POND NORTH COMPARTMENT (SCP-N) OLD GYPSUM STACK-SOUTH (OGS-S) SOUTH COOLING POND SOUTH COMPARTMENT (SCP-S)

  11. STORAGE CAPACITY IN STACK COMPARTMENTS Lined Reservoir Capacity, MGal Gained Storage, MGal Current Capacity, MGal Compartment NGS-N 125 270 + 145 OGS-S 110 155 + 45 OGS-N 145 240 + 95 SUBTOTAL 380 665 + 285 NGS-S (OPTIONAL) 300 670 + 370 TOTAL680 1,335 + 655

  12. RECOMMENDED CONSUMPTION(DUAL RESERVOIR OGS CLOSURE OPTION) DECEMBER 3.0 MGD JANUARY 2.5 MGD FEBRUARY/APRIL 1.5 MGD MAY – AND BEYOND ≤1.0 MGD

  13. PROJECTED SURGE STORAGE CAPACITY WITH NORMAL RAINFALL

  14. PROJECTED WATER INVENTORY WITH NORMAL RAINFALL

  15. CONSUMPTION OUTLETS

  16. CONSUMPTION MAKE-UP BY MONTH

  17. PROJECTED CLOSURE SCHEDULE PINEY POINT GYPSUM STACK CLOSURE 2006 2004 NORTH COOLING POND OR DAP POND (NCP) MAY 2004 NEW GYPSUM STACK-NORTH (NGS-N) 2006 2005 2004/2005 NEW GYPSUM STACK-SOUTH (NGS-S) OLD GYPSUM STACK-NORTH (OGS-N) SOUTH COOLING POND NORTH COMPARTMENT (SCP-N) 2005 2004 OLD GYPSUM STACK-SOUTH (OGS-S) 2006 SOUTH COOLING POND SOUTH COMPARTMENT (SCP-S) 2005

  18. CLOSED SYSTEM CIRCA CY2006 ALTERNATIVE WITH FRESH WATER RESERVOIR PINEY POINT GYPSUM STACK CLOSURE NORTH COOLING POND OR DAP POND (NCP) NEW GYPSUM STACK-NORTH (NGS-N) NEW GYPSUM STACK-SOUTH (NGS-S) OLD GYPSUM STACK-NORTH (OGS-N) SOUTH COOLING POND (SCP) OLD GYPSUM STACK-SOUTH (OGS-S)

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