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TBRR Workshop, University of Washington

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TBRR Workshop, University of Washington

  1. 1. Reservoir Construction Case: Tampa Bay Regional Reservoir By Franz Campero, PhD, PE, MBA
  2. 2. Project Background New Port Richey Pinellas Co. Pasco Co. Tampa St Petersburg •2 Million Residents Served •250 mgd Average Daily Demand Hillsborough Co.
  3. 3. Project Background Enhanced Surface Water System • Three sources – Alafia River, Tampa Bypass Canal & Hillsborough River (197 mgd pumping capacity) • One treatment plant (66 mgd capacity) • One storage element (15 billion gallons)
  4. 4. Project Background Enhanced Surface Water System
  5. 5. Project Background Enhanced Surface Water System To Regional System Hillsborough River Tampa Bypass Canal Pump Station Treatment Plant Pump Station Alafia River Reservoir
  6. 6. Project Background - Components Tampa Bypass Canal Pump Station • Hillsborough River High Water – Minimum 65 mgd over Tampa Dam – Withdrawals increased from 10% to 30% of total flow • Tampa Bypass Canal – Minimum 7 mgd over downstream structure – Withdrawals of 80% of total flow • Total Design Capacity – – 145 mgd
  7. 7. Project Background - Components Alafia River Pump Station Alafia River – Minimum 80 mgd Flow in River – Withdrawals of 10% of total flow, up to 52 mgd
  8. 8. Project Background - Components • Capacity 66 mgd • Water Sources – Alafia River – Hillsborough River – Tampa Bypass Canal • Constructed through a DBO process Tampa Bay Regional Water Treatment Plant
  9. 9. The Reservoir
  10. 10. Tampa Bay Regional Reservoir Project • November 1998 Start of Design Activities • May 2002 Groundbreaking Ceremony • June 2002 Started Construction • March 2005 Construction Completed
  11. 11. The Reservoir Reservoir Site and Pipeline Route
  12. 12. The Reservoir • • • • • Earthen Structure – 1,000 acres – 15 billion gallons Total Project Site – 5,229 acres Connecting Pipeline – 42,000 feet of 84-inch diameter Wetland Mitigation – 450 acres Upland Preservation – 600 acres
  13. 13. The Reservoir: Property Boundaries & Mitigation Areas
  14. 14. The Reservoir: Major Permits • Hillsborough County Department of Health Permits – Local • EPCHC Wetland Authorization – Local • FDEP Environmental Resource Permit - State • SWFWMD Water Use Permit - State • Environmental Impact Statement R.O.D. Federal • USACOE 404 Dredge and Fill Permit - Federal
  15. 15. Site During Phosphate Mining Operations 1957
  16. 16. Site Conditions Prior To Construction
  17. 17. Construction Progress October, 2002
  18. 18. Construction Progress November, 2002
  19. 19. Construction Progress December, 2002
  20. 20. Construction Progress January, 2003
  21. 21. Construction Progress February, 2003
  22. 22. Construction Progress March, 2003
  23. 23. Completed Project March, 2005 Construction Progress December, 2002
  24. 24. The Reservoir: Elements of Embankment Design
  25. 25. Reservoir Embankment •Up to 65 ft High •12,000,000 cy •45,000 cy/day
  26. 26. Collection/Management of Soil Test Data Using GIS/GPS • ESRI ArcPad 6.0 • Data Collected with Laptops and WAAS Enabled GPS Units • Data Downloaded Daily • Merged into Database to Evaluate Data and Plot Using ArcMap 8.0 • Report Generator • Spatial Evaluation Using 3-D Analysis
  27. 27. ArcPad 6.0 • Types of Hardware – Laptop Computer – GPS Unit – Personal Digital Assistant (PDA)
  28. 28. ArcPad 6.0 Customized Data Forms
  29. 29. Proctor Test Locations Through November 2002
  30. 30. Soil Density Test Locations Through November 2002
  31. 31. Tailing Sand Blanket Drain 12” Toe Drain 12” Interior Drain Blanket Drain Interior/ Toe Drain •250,000 CY Tailing Sand •54,000 LF Drain Pipe
  32. 32. Soil-Bentonite Cut-Of Wall •25,500 LFT •890,000 SQFT •7,000 SQFT/DAY
  33. 33. Cutoff Wall: Problems CRACKS!!
  34. 34. Cutoff Wall: Solution
  35. 35. Waste Clay and Unsuitable Soils Removal •1,000,000 CY
  36. 36. Upstream Geomembrane Seepage Control System •4,000,000 SQFT •25,500 LFT Tie-In to SBCW
  37. 37. Geomembrane Problems
  38. 38. Soil-Cement Upstream Slope Erosion Protection •105,000 CY Stair-Step •260,000 CY Flat-Plate
  39. 39. Soil Cement Problems CRACKS!!!
  40. 40. Soil Cement Problems
  41. 41. Questions?

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