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Video and Sonar Inspection Guides Rehabilitation of the Coronado Transbay Sewer Force Main Presented and Written By Elmer Alex, PE, M. ASCE Contributions by Marc Solomon, PE;  Maggie Witt, PE; Jason Gornall, EIT Contributing Authority: Ed Walton, PE For ASCE Pipelines Conference 2009 August 18, 2009
Outline ,[object Object],[object Object],[object Object],[object Object]
Location Map City of Coronado You are Here!
City of Coronado City of San Diego Transbay Pump Station Original Force Main Seaport Village New Force Main Original Transbay Force Main Location
Challenges ,[object Object],Insert Profile Drawing Slope >30% 50 feet below MSL High Profile Locations 3,600 LF Dewatering may accelerate corrosion
Apply Lesson’s Learned from  “The Tortoise and the Hare” Fable
Risk Management Plan Development ,[object Object],[object Object],[object Object],[object Object],Respond to Risks Analyze Risks Identify Risks Track and Report Risks
Risk Management Team Name Organization Role Responsibilities Eric Minicilli City of Coronado Project Manager Project Manager and Point Of Contact for City Ed Walton City of Coronado City Engineer Kim Godby City of Coronado O&M Manage City O&M Staff Marc Solomon Winzler & Kelly Consultant/Engineer Lead Risk Manager Elmer Alex Winzler & Kelly Consultant/Engineer Alt. Risk Manager Corey Charfauros Affordable Pipeline Services Entry Point Cleaning Lead Manage cleaning & inspection support efforts James Milward Pipe Eye Int’l (acquired by Pure Technologies) Inspection Lead Pilot/Equipment Operator
Identify and Analyze Risk ,[object Object],[object Object],[object Object],Yellow Green Red Category Definition Priority Potential for 100% Failure High Potential to lengthen inspection Medium Very Low risk Low
Risk Response Risk Avoid Accept Mitigate - Prevent - Contingency
Risk Management Process Yellow Yellow Yellow Risk # Description Priority Response Team Member Activity 1 Confined Space Hazards Mitigate Affordable Pipeline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],6 Sharp Vertical Bends Endanger Cable Mitigate Pipe Eye ,[object Object],[object Object],[object Object],7 Poor Visibility & Cloudy Water Mitigate City ,[object Object],[object Object]
Pre-Inspection Activities Prepare Point of Entry on Coronado Side
Inspection Moved to San Diego Side
Mitigate Confined Space Hazards
Monitor Progress
Track and Maintain the Risk Log Yellow Yellow Yellow Risk # Description Encountered (Y/N) Category Response 1 Confined Space Hazards Yes ,[object Object],[object Object],6 Sharp Vertical Bends Endanger Cable No ,[object Object],[object Object],7 Poor Visibility & Cloudy Water Yes ,[object Object]
Clean Up & Demobilize
Inspection Results
Pipeline Rehabilitation/Re-use Analysis ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Evaluation Criteria & Weighting Factors Criteria Weighting Factors Impacts to Surroundings 18% Structural Integrity 7% Operational Reliability 15% Operational Flexibility 5% Constructability 12% Hydraulic Improvements 3% Risk 15% Capital Cost 8% O & M Cost 9% Life Cycle Cost 8%
Evaluation Matrix
Conclusion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Questions

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Asce Presentation

  • 1. Video and Sonar Inspection Guides Rehabilitation of the Coronado Transbay Sewer Force Main Presented and Written By Elmer Alex, PE, M. ASCE Contributions by Marc Solomon, PE; Maggie Witt, PE; Jason Gornall, EIT Contributing Authority: Ed Walton, PE For ASCE Pipelines Conference 2009 August 18, 2009
  • 2.
  • 3. Location Map City of Coronado You are Here!
  • 4. City of Coronado City of San Diego Transbay Pump Station Original Force Main Seaport Village New Force Main Original Transbay Force Main Location
  • 5.
  • 6. Apply Lesson’s Learned from “The Tortoise and the Hare” Fable
  • 7.
  • 8. Risk Management Team Name Organization Role Responsibilities Eric Minicilli City of Coronado Project Manager Project Manager and Point Of Contact for City Ed Walton City of Coronado City Engineer Kim Godby City of Coronado O&M Manage City O&M Staff Marc Solomon Winzler & Kelly Consultant/Engineer Lead Risk Manager Elmer Alex Winzler & Kelly Consultant/Engineer Alt. Risk Manager Corey Charfauros Affordable Pipeline Services Entry Point Cleaning Lead Manage cleaning & inspection support efforts James Milward Pipe Eye Int’l (acquired by Pure Technologies) Inspection Lead Pilot/Equipment Operator
  • 9.
  • 10. Risk Response Risk Avoid Accept Mitigate - Prevent - Contingency
  • 11.
  • 12. Pre-Inspection Activities Prepare Point of Entry on Coronado Side
  • 13. Inspection Moved to San Diego Side
  • 16.
  • 17. Clean Up & Demobilize
  • 19.
  • 20. Evaluation Criteria & Weighting Factors Criteria Weighting Factors Impacts to Surroundings 18% Structural Integrity 7% Operational Reliability 15% Operational Flexibility 5% Constructability 12% Hydraulic Improvements 3% Risk 15% Capital Cost 8% O & M Cost 9% Life Cycle Cost 8%
  • 22.

Editor's Notes

  1. Original Transbay Force Main Constructed in early 1970 24-inch Ductile Iron Construction New Force main in 2007 HDPE Horizontal Directional Drilling Purpose of the inspection was to assess the original pipeline for re-use as a back up and satisfy stake holder requirements.
  2. Describe challenges (items will fly in) High Profile Location – Major shopping and tourist destinations on both sides of the Bay Slopes greater than 30% 50 feet below Mean Sea Level Length of inspection – 3,600 LF, traditional inspection not feasible Dewatering may accelerate corrosion