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WATERPOWER XII SMALL HYDRO WORKSHOP SITE DEVELOPMENT AND COSTS by JIM GORDON

WATERPOWER XII SMALL HYDRO WORKSHOP SITE DEVELOPMENT AND COSTS by JIM GORDON. SITE DEVELOPMENT AND COSTS. 1. INTRODUCTION OUTLINE PITFALLS SOME DESIGN GUIDELINES SOME CONSTRUCTION GUIDELINES. SITE DEVELOPMENT AND COSTS. 2. CASE STUDIES Case 1, Disaster Rapids.

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WATERPOWER XII SMALL HYDRO WORKSHOP SITE DEVELOPMENT AND COSTS by JIM GORDON

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  1. WATERPOWER XIISMALL HYDRO WORKSHOPSITE DEVELOPMENT AND COSTSbyJIM GORDON Jim Gordon

  2. SITE DEVELOPMENT AND COSTS • 1. INTRODUCTION • OUTLINE PITFALLS • SOME DESIGN GUIDELINES • SOME CONSTRUCTION GUIDELINES Jim Gordon

  3. SITE DEVELOPMENT AND COSTS • 2. CASE STUDIES • Case 1, Disaster Rapids. • Case 2, Sunshine River. Jim Gordon

  4. SITE DEVELOPMENT AND COSTS • CASE 1 DISASTER RAPIDS. • DEVELOPER WITH NO HYDRO EXPERIENCE • QUESTIONABLE DESIGN • INEXPERIENCED CONTRACTOR Jim Gordon

  5. SITE DEVELOPMENT AND COSTS • CASE 1 DISASTER RAPIDS. • STOPLOG SPILLWAY WITH NO HOIST • 1 VIBRATING SPILLWAY GATE • FLEXIBLE POWERHOUSE Jim Gordon

  6. SITE DEVELOPMENT AND COSTS • CASE 1 DISASTER RAPIDS. • COFFERDAM FAILED TWICE • GENERATOR DROPPED 2M. • SUMP PUMP FAILED, PH FLOODED • POWERHOUSE WALLS POROUS • YEAR LATE & OVER BUDGET Jim Gordon

  7. SITE DEVELOPMENT AND COSTS • CASE 2 SUNSHINE RIVER • DEVELOPER A RETIRED CONTRACTOR • EXPERIENCED CONTRACTOR • SENIOR HYDRO ADVISOR Jim Gordon

  8. SITE DEVELOPMENT AND COSTS • CASE 2 SUNSHINE RIVER • NEGOTIATED ALL CONTRACTS • SMALL DESIGN TEAM • OWNER MANAGED PROJECT FROM A SITE OFFICE • ON TIME, WITHIN BUDGET Jim Gordon

  9. SITE DEVELOPMENT AND COSTS • LESSONS LEARNED • USE ONLY EXPERIENCED STAFF • SMALL DESIGN TEAM • UNDERTAKE SITE INVESTIGATIONS • APPOINT A PROJECT MANAGER • CONSULTANT TO WORK FOR CONTRACTOR Jim Gordon

  10. SITE DEVELOPMENT AND COSTS • 3. SITE SELECTION CONSIDERATIONS • EXISTING DAM • HIGHER HEADS • SHORT CONDUITS Jim Gordon

  11. SITE DEVELOPMENT AND COSTS • 4. DAM AND SPILLWAY FEATURES • NO GATES • EMBANKMENT DAM WITH WEIR SPILLWAY IN ABUTMENT • CONCRETE OR RCC DAM WITH OVERFLOW WEIR SPILLWAY Jim Gordon

  12. SITE DEVELOPMENT AND COSTS • 5. INTAKE • DOWNSTREAM SEALING ROLLER GATE WITH FAN BRAKE • SEPARATE AIR VENT HOUSE • AIR VENT LAGE ENOUGH FOR MAN ACCESS TO PIPE Jim Gordon

  13. SITE DEVELOPMENT AND COSTS • 6. PIPELINE • LENGTH TO HEAD RATIO BELOW +/- 6 • SURGE TANKS ARE EXPENSIVE • PREFERENCE FOR BURIED PENSTOCK Jim Gordon

  14. SITE DEVELOPMENT AND COSTS • 7. POWERHOUSE • PROVIDE FOR VENTILATION • PROVIDE FOR MAINTENANCE • ACCESS FOR PICKUP • SMALL REPAIR BAY • ACCESS AROUND EQUIPMENT • SMALL CRANE, POWER HOIST MANUAL TRAVEL Jim Gordon

  15. SITE DEVELOPMENT AND COSTS • 8. POWERPLANT EQUIPMENT • MAJOR MANUFACTURERS • MAINTAIN HYDRAULIC LABORATORY • PRODUCE SOPHISTICATED DESIGNS • MAINTAIN CLOSE - NODE CFD PROGRAMS • SMALL MANUFACTURERS • PRODUCE LOWER COST EQUIPMENT • USUALLY LESS EFFICIENCT TURBINES Jim Gordon

  16. SITE DEVELOPMENT AND COSTS • 9. CONSTRUCTION CONTRACTS • TWO TYPES - UNIT PRICE AND LUMP SUM • UNIT PRICE - USED ON LARGE PROJECTS • LUMP SUM - (LS) USED ON ALMOST ALL SMALL HYDRO PROJECTS Jim Gordon

  17. SITE DEVELOPMENT AND COSTS • 9. CONSTRUCTION (LS) CONTRACTS • DISADVANTAGES • DESIGN QUALITY CAN BE COMPROMIZED • CLAIM RESOLUTION DIFFICULT - LITIGATION LIKELY • GENERATING EQUIPMENT MAY NOT BE OPTIMIZED TO SITE Jim Gordon

  18. SITE DEVELOPMENT AND COSTS • 9. CONSTRUCTION (LS) CONTRACTS • ADVANTAGES • COST KNOWN WITH HIGHER ACCURACY • SURVEYS FOR QUANTITIES ELIMINATED • CONSULTANT WORKS CLOSELY WITH CONTRACTOR TO OPTIMIZE DESIGNS Jim Gordon

  19. SITE DEVELOPMENT AND COSTS • 9. CONSTRUCTION (LS) CONTRACTS • TO OVERCOME DISADVANTAGES • PREQUALIFY CONTRACTORS & CONSULTANTS • AWARD SEPARATE W/W EQUIP. CONTRACT • PREPARE DETAILED SPECIFICATIONS • VERY DETAILED SCADA REQUIREMENTS • NEGOTIATE REASONABLE CLAIMS • PAYMENTS BASED ON EVENTS Jim Gordon

  20. SITE DEVELOPMENT AND COSTS • 10. ENGINEERING • TWO STANDARDS FOR DESIGN WORK • DOCUMENTED DESIGN • NON - DOCUMENTED DESIGN • COST DIFFERENCE 2.5 : 1 Jim Gordon

  21. SITE DEVELOPMENT AND COSTS • 11. MAINTENANCE REQUIREMENTS • ACCESS TO ALL EQUIPMENT • LIFT GATES ABOVE WATER • INWARD OPENING WINDOWS • LARGE ACCESS TO TUNNELS • ACCESS TO ALL ROCK ROOFS • ACCESS TO ALL ROCK SHAFTS • ACCESS TO ALL DAM CRESTS AND TOES Jim Gordon

  22. SITE DEVELOPMENT AND COSTSTHE ENDTHANKS FOR YOUR ATTENTION Jim Gordon

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