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WATER SUPPLY - System Reliability - Florida Keys Aqueduct Authority WORKSHOP February 18, 2014

WATER SUPPLY - System Reliability - Florida Keys Aqueduct Authority WORKSHOP February 18, 2014. Reliability Components. Groundwater Supply Quantity Quality Infrastructure Treatment Transmission Distribution Response Plans Long-term Short-term Emergencies. SUPPLY AND DEMAND.

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WATER SUPPLY - System Reliability - Florida Keys Aqueduct Authority WORKSHOP February 18, 2014

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  1. WATER SUPPLY - System Reliability -Florida Keys Aqueduct AuthorityWORKSHOPFebruary 18, 2014

  2. Reliability Components • Groundwater Supply • Quantity • Quality • Infrastructure • Treatment • Transmission • Distribution • Response Plans • Long-term • Short-term • Emergencies

  3. SUPPLY AND DEMAND • Master Plan Developed In 2006 • Population/Flow Projections showed Increased Demands • Major Capital Components • New RO WTP and Well field • New Booster Pump Stations • New Distribution PS/Storage • Continued R/R

  4. SUPPLY AND DEMAND Decreased demand projections: • Reduced need for added booster pump stations • Property, structures, equipment and electric Changed economic conditions: • Delays construction of distribution pump stations and storage tanks

  5. WATER QUALITY Wellfield and Aquifers Biscayne meets all standards Nitrate only parameter with up trend Floridan meets standards, other than chlorides. RO system removes chlorides. Supply Protection Land management of wellfield Monitoring of ground and surface waters Action plans based on monitoring data and/or events

  6. INFRASTRUCTURE INTEGRITY Transmission Main Assessment Vulnerability Assessment to determine • Areas where leaks and corrosive soils occur • Difficult access for repair • Older sections for replacement

  7. INFRASTRUCTURE INTEGRITY Pipeline Protection Cathodic Protection against corrosive environment • Steel pipe section along transmission main • Steel water storage tanks

  8. OPERATIONAL REDUNDANCY Water Supply and Treatment Multiple Wells Multiple Treatment Units Emergency Power Generation Electric and Diesel Pumps

  9. OPERATIONAL REDUNDANCY Water Supply and Treatment 2 MGD Emergency Seawater Desalination Stock Island(Diesel) 1 MGD Emergency Seawater Desalination Marathon (Diesel)

  10. OPERATIONAL REDUNDANCY Transmission Pipeline Pumping Capability Four Booster Pump Stations Electric and Diesel Pumps Emergency Power Generation

  11. OPERATIONAL REDUNDANCY Emergency Backpumping Three pumps on Stock Island Diesel/Electric Three pumps in Marathon Diesel/Electric 23 of 36 Million Gallons Storage Capacity For Backpump Operations

  12. System Usage (Demand)

  13. Operational Challenge“Sole Pipeline”

  14. Pipeline Disruption What Happens?

  15. Scenario # 1 Land Based Pipe Failure

  16. Pipeline ControlmanCommunicates Known Conditions

  17. Operations Area ManagerAssesses Field Conditions • Reports To Manger of Operations: • Exact Locations of Failure • Needed Equipment, Supplies, and Personnel • Estimates Amount of Time Required for Back Pumping and to Complete Repair • Traffic Impacts

  18. Manager of Operations • Determines: • Amount of Water Stored in Affected Area • Amount of Time Back Pumping Operation Possible • Necessity of RO Plant(s) • Operational Changes to Overall System

  19. Operations Team Makes Repair

  20. Scenario # 1 Closing Thoughts Occurred 11 Times In Past 5 Years In All Cases Stored Water Supply Was Sufficient Reverse Osmosis Plants Were Not Operated Confident Similar Emergency Repairs Will Have Same Success Of Timely Completion

  21. Scenario # 2 Key Largo to Florida City Pipe Failure

  22. Scenario #2 Plan

  23. Highlights of Plan Build Access Pad to Leak Site Utilizing Available Contractors Implement Water Excavation Stock Materials Needed for Repair Effect Repair Similar to Land Based

  24. Challenges of Plan Never Been Done Availability Of Contractors Assume Up TO 4 Days To Complete Seawater ROs Only Water Supply

  25. Scenario # 2 Closing Thoughts Mandatory Water Restrictions Needed Water Demands May Not Be Met For Days Intermittent Or Complete Shut Down Of Some Distribution Systems/Possible Container Filling Identify Possibility Of Expedited Repair Develop Emergency Plan With Monroe County

  26. Scenario # 3 Bridge Failure

  27. Scenario # 3 Plan Dependent on DOT Contractor to Replace Pipe as Bridge is Replaced/Repaired Maintain Pipe Inventory for Repair Depend on RO Production for Supply

  28. FKAA Pipe Inventory

  29. Scenario # 3 Closing Thoughts Repairs May Require Months To Complete Water Demands Likely Exceed Supply Barge/Ship Mounted RO Possible (Navy) Consider Long Term Pipeline Redundancy Plan Additional RO Capacity

  30. Discussion

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