water main line stopping - newfoundland and labrador · water main break – august 2011 • water...
TRANSCRIPT
![Page 1: WATER MAIN LINE STOPPING - Newfoundland and Labrador · Water Main Break – August 2011 • Water Main Break occurred on August 31, 2011 at 1:45 pm • Isolation Attempt #1 2 Main](https://reader031.vdocuments.us/reader031/viewer/2022011901/5f08e7b27e708231d4244a5f/html5/thumbnails/1.jpg)
WATER MAINLINE STOPPING
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Overview• Water Main Break – August 2011
• Valve Repair Options
• Line Stop Process
• Line Stop Project
• Lessons Learned
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Water Main Break – August 2011Summary• Retaining Wall adjacent to
Bowring Park damaged during Hurricane Igor
• Temporary Repairs made with Armour Stone
• Contractor hired to replace damaged section of retaining wall
• 400mm Water Main located under wall footing
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Water Main Break – August 2011
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Water Main Break – August 2011
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Water Main Break – August 2011
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Water Main Break – August 2011
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Water Main Break – August 2011
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Water Main Break – August 2011
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Water Main Break – August 2011
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Water Main Break – August 2011
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Water Main Break – August 2011
• Water Main Break occurred on August 31, 2011 at 1:45 pm
• Isolation Attempt #12 Main Line Valves3 - 4 Secondary Valves
• Isolation Attempt #22 Main Line Valves6 - 8 Secondary Valves
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Water Main Break – August 2011
• Isolation Attempt #34 Main Line Valves50-60 Secondary Valves
• Water Main RepairWater Main Break was
never completely isolatedRepair completed with
water still flowing –approx. ¼" pipe
Repair completed Sept. 2
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Water Main Break – August 2011
• Water Main RepairWater Main Break occurred
on 400mm transmission main
Two 400mm Valves discovered to be inoperable
• Damaged Valves need to be Repaired or ReplacedValves originally installed in
1954
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Valve Repair Options
Options Reviewed to Repair / Replace 400mm Valves
1. Repair Valve• Given age of valve decided better to replace valve• Option Eliminated
2. Replace Valve• Could not isolate water main for water main break• Therefore how could isolate water main to install new
valves?• Option Eliminated
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Valve Repair Options
Options Reviewed to Repair or Replace 400mm Valves
3.Insertion Valve• At the time of evaluation –
none of the manufacturers could perform a 400mm valve insertion
• Option Eliminated
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Valve Repair Options
Options Reviewed to Repair or Replace 400mm Valves
4.Line Stop• Specialized equipment and
personal required• Option Selected as only
alternative available
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Process
• What is a Line Stop?
A method to temporarily shut off the flow (water, oil,
gas, steam, etc.) of an in-service pipe system.
A hot tap is performed on the pipe system and a
temporary plug is inserted into the pipe.
Once the work is complete, the plug is removed and
the opening is sealed with a blind flange.
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Process
Step 1 - Install Tapping Sleeve and Valve
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Process
Step 2 – Install Drill and Tap Main
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Process
Step 3 – Install Temporary Plug
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Process
Step 4 – Plug Removed & Blind Flange Installed
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Project
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Project
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Project
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Project
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Project
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Project
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Project
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Project
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Project
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Project
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Project
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Project
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Project
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Project
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Project
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Project
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Project
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Project
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Line Stop Project
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Lessons LearnedLine Stop Method was successful• Would consider using again
Planning is Critical • prior to the start of the job there was months of
planning
1. Design2. Pre-Construction3. Construction
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Lessons Learned
Planning – Design• Research and understand construction methods• Select line stop locations• Select valve locations• Measure Pipe OD• Obtain Pipe Sample - Coupon
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Lessons Learned
Planning – Pre-Construction• Determine Critical Customers• Develop water outage plan, including affected area
and isolation valves• Locate, clean and check all required valves• Develop list of required materials and order if
necessary• Prepare Traffic Plan
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Lessons Learned
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Lessons Learned
Planning – Construction• Prepare Water Interuption Notices – Notify Residents• Conduct Pre-Job Meeting with Contractor(s)• Know what is expected from all parties involved• Pre-Fabricate as much as possible• Ensure all required materials are on-site
DEPARTMENT OF PUBLIC WORKS & PARKSENVIRONMENTAL SERVICES DIVISION
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Thank You
DEPARTMENT OF PUBLIC PARKS AND PARKSENVIRONMENTAL SERVICES DIVISION