unmarked sewer laterals horizontal cross bores l.
Skip this Video
Loading SlideShow in 5 Seconds..
“Unmarked Sewer Laterals & Horizontal Cross-Bores” PowerPoint Presentation
Download Presentation
“Unmarked Sewer Laterals & Horizontal Cross-Bores”

Loading in 2 Seconds...

play fullscreen
1 / 46

“Unmarked Sewer Laterals & Horizontal Cross-Bores” - PowerPoint PPT Presentation

  • Uploaded on

“NPL Quality – The Pipeline To Success”. AGA 2006 Operations Conference. “Unmarked Sewer Laterals & Horizontal Cross-Bores”. Mike Kemper, NPL Construction Company. “NPL Quality – The Pipeline To Success”. Who is NPL?. Core Business :

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation

“Unmarked Sewer Laterals & Horizontal Cross-Bores”

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
    Presentation Transcript
    1. “NPL Quality – The Pipeline To Success” AGA 2006 Operations Conference “Unmarked Sewer Laterals &Horizontal Cross-Bores” Mike Kemper, NPL Construction Company

    2. “NPL Quality – The Pipeline To Success” Who is NPL? Core Business: • The safe installation & maintenance of reliable energy distribution systems • Over 500 crews • Over 2500 employees • Operate in 20 states • One of the largest users of One-Call Centers in U.S


    4. More & More Utilities Are Installed Using Trenchless Technology

    5. Do We Have a Problem? Who’s responsible for marking? Sewer Main Lateral to mains connection Service line House City street Property line What could happen?


    7. What happens when laterals are hit during drilling / boring operations? What happens when a plumber is called?

    8. Utility Service line + Sewer Line + Rotary-Rooter = Disaster

    9. Headline:February 15, 2002 Officials Seek Answers In Gas Explosion

    10. Headline:February 16, 2002Shocked Gas Company Pleads Ignorance • The natural gas explosion that rocked a mobile home park on Wednesday shocked officials who say they never knew their gas line bisected the clay sewer pipe. • A plumbing contractor was removing tree roots from a sanitary sewer line in the 127 unit mobile home park when the gas line was struck. • “About the only time we know about sewer lines is when people call because they get backed up and have to call someone in to clean them”, said the Operations Manager with the Local Gas Company.

    11. Headline:March 13, 2006Woman, Granddaughters Barely Escape Explosion

    12. Headline:March 17, 2006Answers in Gas Home Explosion • Investigators say they now know exactly what led to home explosion. • The subcontractor the Local Gas Company hired to install new gas lines ran the gas line into the sewer line. The augur went “right through the gas pipe and they didn’t even know they had done that.” - Fire Marshall • City Building Inspector: the contractor “did the work like any other contractor would. There’s no system to know exactly where sewers are, especially to a house on a hill.”

    13. Headline:March 17, 2006Answers in Gas Home Explosion • Fire Chief says a plumber was using an auger to clear a clogged drain when he accidentally hit a natural gas line. After seeing bubbles in the water and smelling the gas, he told a grandmother and 3 grandchildren to get out of the home immediately, likely saving lives. • As soon as the people got out of the home, it blew up.

    14. Headline:March 17, 2006Answers in Gas Home Explosion • This isn’t the first time city officials have discovered a gas line that broke a sewer line. • City Inspectors say this affects more than residents of their own city. • They plan on meeting with the Local Gas Company to come up with a plan to prevent this from happening again.

    15. Kansas School Explosion

    16. Virginia Explosion

    17. Indiana Explosion

    18. Minnesota Explosion

    19. Rhode Island Explosion

    20. Ohio Gas Fire

    21. Your State? Your Territory?

    22. The dangers of cross-bored sewer laterals exist in every neighborhood

    23. Commercial Building School Residential Home Mobile Home Park Apartment Complex

    24. How often does this happen?

    25. What are the odds?One Case Study: 11,000 Laterals Were Inspected; 250 Hits Identified And Repaired; 2% of Sewer Laterals Were Hit. How Many Might Have Led To AMajor Incident?

    26. Another Case Study • 4 Blocks Were Inspected; • 24 Hits Were Discovered.


    28. The Big Concerns • Catastrophic Human Tragedy • Huge Property Costs


    30. THE COST CONCERN • Contractors and Utilities are often held responsible for hitting these unmarked, unknown utility lines; • Insurance rates are on the rise; • As the insurance industry is becoming rapidly aware of this exposure, the ability to secure insurance for trenchless technology is in jeopardy.

    31. THE ROOT CAUSE: A CATCH 22 • Crews have no practical way of finding them & are often even prohibited from checking for them due to governmental no-cut policies. • The laws in some States do not require all privately-owned & some publicly-owned facilities in the historic corridor to be marked. • The laws in some States are not well enforced.

    32. State Regulations – 40 States • “Owner or operator of an underground facility is responsible to locate the approximate horizontal location of that facility”. • Is that the home/building owner or municipality? • Courts have ruled that home/building owner does not have expertise to be responsible for location of sewer laterals. • Does the State require them to join the One-Call system? • Who is responsible for enforcement?

    33. Interesting Interpretations? • In Kansas and Vermont: • Sewer is not designated as a “facility”; • In California: • exempts “non-pressurized” lines; • In Missouri: • exempts “privately owned” sewer and water lines.

    34. “Houston, we have a problem” -Tom Hanks in Apollo 13

    35. THE CHALLENGE • There is little awareness of this issue outside the contracting and insurance industries. • This exposure is escalating as more trenchless installations are done each year. • Action can be taken immediately.

    36. “Luck is not a strategy” Steve Ewing Chairman AGA Vice Chair, DTE Energy

    37. THE SOLUTIONS • Installed Solutions • Installation Solutions

    38. INSTALLED SOLUTIONS • Take stock, get a plan • Example: Educate local plumbers, rental stores, mobile home park owners … to look before they root • Goal: Find installed problems …before they find us.

    39. What about the costs? $50 - $125 per lateral locate depending on variables…. • Diameter of sewer main • How much cleaning required • How many locates per set-up

    40. INSTALLATION SOLUTIONS • All new sewer laterals should be installed with a location device (i.e. tracer wire, marker balls, etc.); • All underground facilities, including sewer lines, should be marked by the entity that receives revenue from the facility.

    41. Goal: Protecting all Parties • Public • Facility Owners • Contractor

    42. Initiate Legislation/Enforcement Support Legislation/Enforcement CALL TO ACTION


    44. “NPL Quality – The Pipeline To Success” We Will Win!

    45. QUESTIONS? QUESTIONS? “NPL Quality – The Pipeline To Success”