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DIRECTIONAL DRILLING AND SEWER LATERALS

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Title: DIRECTIONAL DRILLING AND SEWER LATERALS


1
DIRECTIONAL DRILLING AND SEWER LATERALS
2005 Distribution Workshop November 3, 2005
  • Mike Kemper
  • NPL Construction Company

2
Who is NPL?
  • Core Business
  • The safe installation maintenance of reliable
    energy distribution systems
  • Over 500 crews
  • Over 2400 employees
  • Operate in 20 states
  • One of the largest users of One Call Centers in
    U.S

3
THE OFTEN FORGOTTEN UNDERGROUND WORLD
4

Buried Infrastructure Problems A World-Wide
Concern
  • Existing infrastructure has become very congested
  • We continue to add and change utilities because
    of expansion, modernization, and changing
    missions
  • Overall, we do not always have adequate records
    to tell us where all of our utilities are located


5
More more utilities are installed using
underground technology
6
Smaller utilities
  • telephone
  • fiber optic
  • services
  • cable TV
  • electrical
  • gas

Larger utilities
  • sewer
  • water

7
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8
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9
Possible Scenario?
What could happen?
10
GAS LINE IN A 6 SEWER
11
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12
What happens when laterals are hit during
drilling operations?
What happens when a plumber is called?
13
Gas line Sewer line Rotary-rooter Disaster
14
Headline February 15, 2002 Officials seek
answers in gas explosion
15
HeadlineFebruary 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.


16
Indiana Explosion
17
Kansas School Explosion
18
Minnesota Explosion
19
Ohio Gas Fire
20
Rhode Island Explosion
21
Virginia Explosion
22
Your state? Your territory?
23
In every neighborhood the danger of unmarked
sewer laterals exists
24
Commercial Building
School
Residential Home
Mobile Home Park
Apartment Complex
25
How often does this happen?
26
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 a major incident?

27
Another Case Study
  • 4 blocks were inspected
  • 24 hits were discovered

28
LOW FREQUENCYHIGH SEVERITY
The Exposure
29
The Big Concerns
  1. Catastrophic human tragedy
  2. Huge costs

30
THE GREATEST CONCERN
  • CATASTROPHIC PERSONAL LOSSES
  • because some
  • utility lines
  • are
  • EXEMPT
  • FROM
  • LOCATING LAWS

31
THE COST CONCERN
  • Contractors and Utilities are often held
    responsible for hitting these unmarked, unknown
  • 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

32
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.

33
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?

34
State Regulations 10 States
  • New Jersey
  • New Mexico
  • Oklahoma
  • Rhode Island
  • Texas
  • Virginia
  • Missouri
  • California
  • Kansas
  • Vermont

35
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

36
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

37
THE SOLUTIONS
  1. Installed Solutions
  2. Installation Solutions

38
INSTALLED SOLUTIONS
  • Educate local plumbers, rental stores, mobile
    home park owners to look before they root
  • Find installed problems before they find us


39
What about the costs?
75 - 175 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
  • Gas Company
  • Contractor

42
CALL TO ACTION
  • Initiate legislation/enforcement
  • Support legislation/enforcement

43
THIS IS A VERY IMPORTANT ISSUE!
44
We Will Win!
45
QUESTIONS?
QUESTIONS?
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