NJNG Distribution System Overview Customers: 538,700 Distribution - - PowerPoint PPT Presentation

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NJNG Distribution System Overview Customers: 538,700 Distribution - - PowerPoint PPT Presentation

Apr 06, 2024 307 likes •467 views

NJNG DIMP 1 NJNG Distribution System Overview Customers: 538,700 Distribution main: 7,271 miles Plastic: 4,113 miles Steel: 3,158 miles o Cathodically unprotected steel: 196 miles Services: 525,558 services NJNG DIMP 2 History of DIMP

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SLIDE 1

NJNG DIMP

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NJNG Distribution System Overview

Customers: 538,700 Distribution main: 7,271 miles

  • Plastic: 4,113 miles
  • Steel: 3,158 miles
  • Cathodically unprotected steel:

196 miles Services: 525,558 services

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SLIDE 2

NJNG DIMP

History of DIMP

  • PHMSA implemented integrity management (“IM”) regulations for gas

transmission pipelines in 2004. These regulations aimed to assure transmission pipeline integrity and further improve pipeline safety.

  • On December 4, 2009, PHMSA published the final rule establishing

integrity management regulations for gas distribution pipeline systems.

  • Final Rule implemented August, 2011

Rule Summary

  • Identify existing and potential threats, Evaluate and rank risk.
  • Identify and implement measures to address risks
  • Measure IM program performance, monitor results, and evaluate

effectiveness

  • Periodically assess and improve the IM program
  • Report performance results to PHMSA and State pipeline safety

regulators

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SLIDE 3

NJNG DIMP

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How NJNG Applies DIMP

NJNG DIM Program

  • The DIMP is the overall approach by NJNG to ensure the integrity
  • f its gas distribution system.
  • This approach includes:
  • Identifying distribution system threats
  • Performing distribution risk assessments
  • Identifying measures to reduce distribution risk
  • Using performance measures to gauge DIM Program

effectiveness

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SLIDE 4

NJNG DIMP

How NJNG Applies DIMP

  • Risk Assessments Highlight Top Risks
  • Corrosion Leaks
  • Excavation Damages
  • Measures To Reduce Risks Are Identified
  • Accelerated Bare Steel Replacement Programs
  • Damage Prevention and Public Awareness Programs
  • Performance Measures Gauge Effectiveness
  • Corrosion Leaks per Metallic Facility Mile
  • Excavation Damages per 1000 Tickets

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SLIDE 5

NJNG DIMP

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NJNG DIMP Risk Assessment Models Asset Class-Based Relative Risk Model

  • Provides high-level (Top 15) risk ranking by threat category.
  • Uses SME input from the Operations, Engineering and Corrosion.
  • Incorporates the previous 5 years of NJNG leak data.
  • Includes 20 years of national gas incident data.

Segment-Based Relative Risk Model

  • Software running within GIS system provides risk ranking at the

gas main segment level for replacement prioritization.

  • This risk assessment is run annually and results are shared with

Engineering for replacement prioritization

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SLIDE 6

NJNG DIMP

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NJNG Accelerated Infrastructure Replacement and Enhancement Programs

SAFE I

March 2012

NJ RISE

September 2013

SAFE II

November 2015

IIP

February 2019

  • 1. SAFE I: Safety Acceleration and Facility Enhancement I
  • 2. NJ RISE: New Jersey Reinvestment in System Enhancements
  • 3. SAFE II: Safety Acceleration and Facility Enhancement II
  • 4. IIP: Infrastructure Investment Program

These programs help mitigate Corrosion and Natural Forces threats.

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SLIDE 7

NJNG DIMP

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SAFE I - Safety Acceleration and Facility Enhancement I

  • 5 year capital investment program (approx. $204 million)

Started 2012

  • Replaced 66 miles of cast iron main (100% of total

population)

  • Replaced 278 miles of unprotected steel main

ü Eliminated cast iron in 2015 ü Reduced Corrosion related leaks

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SLIDE 8

NJNG DIMP

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NJ RISE - NJ Reinvestment in System Enhancements

  • 5 year capital investment program (approx. $102.5

million) started 2013

  • Projects:
  • Install approx. 30,000 excess flow valves (EFVs) in

coastal communities to mitigate storm effects

  • Reconstruct and/or relocate 3 distribution regulator

stations on barrier islands to mitigate flooding impacts

  • Install 4 secondary distribution mains from mainland to

barrier islands for system reinforcement

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SLIDE 9

NJNG DIMP

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SAFE II - Safety Acceleration and Facility Enhancement II

  • 5 year capital investment program (approx. $200 million)
  • Replacement Projects:
  • Replace all remaining unprotected steel main and

associated services (100% of approx. 276 miles)

  • Reduced corrosion leaks per metallic facility mile
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SLIDE 10

NJNG DIMP

NJNG Risk Reduction

10 100 200 300 400 500 600 2010 2011 2012 2013 2014 2015 2016 2017 2018

CI/Bare Steel Inventory

Cast Iron Bare Steel 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.2

Leaks per Mile of System

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SLIDE 11

NJNG DIMP

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0.00 0.05 0.10 0.15 0.20 0.25 0.30 2011 2012 2013 2014 2015 2016 2017 2018

Corrosion Leaks per Metallic Facility Mile

Total Corrosion Leaks per Metallic Facility Mile Hazardous Corrosion Leaks per Metallic Facility Mile Baseline (5 year rolling average)

Baseline: 0.15

Total Corrosion Leaks per Metallic Facility Mile

Baseline: 0.07

Hazardous Corrosion Leaks per Metallic Facility Mile

NJNG – Corrosion Leaks per Metallic Facility Mile

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SLIDE 12

NJNG DIMP

Excavation Damage Prevention Action Items

  • Provided Partners in Safety training for excavators within our

service territory

  • Hold “Dig Safely” fairs at various locations to educate general

population in damage prevention and natural gas safety

  • Invite excavators to breakfast seminars to update on current

811 updates and other locating changes

  • Dedicated department to locating inspections and excavator

damage oversight and random quality audits

  • Participate in regional CGA chapter and propagate Damage

Prevention Best Practices

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SLIDE 13

NJNG DIMP

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2.00 2.20 2.40 2.60 2.80 3.00 3.20 3.40 3.60 3.80 2011 2012 2013 2014 2015 2016 2017 2018

Excavation Damages per 1000 Tickets

Excavation Damages per 1000 Tickets Baseline (5 year rolling average) Baseline: 3.16

Note: Hurricane Sandy made landfall in New Jersey on October 29, 2012. Subsequent repairs contributed to an increase in excavation damages. NJNG – Excavation Damages per 1000 One Call Tickets

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SLIDE 14

NJNG DIMP

DIMP Benefits

  • DIMP provides a structured approach to accurately

identify and effectively mitigate distribution system threats

  • Continuous monitoring of leak data and performance

measures allows NJNG to clearly see deviations and address issues accordingly

  • This has helped us achieve the lowest leak ratio in the state
  • There were 2,000 less leak calls in our fiscal year 2019

than in 2018

  • Educating the public regarding proper locating has

reduced excavation damages

  • Over 30% reduction in 3rd party damages since the

inception of DIMP

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