Introduction

In New York City, there were more than 60,000 emergency calls made by the New York City Fire Department (FDNY) related to gas leaks between 2013 and 2015. While most of these calls resulted in no damage or injury, several incidents did end with fatalities. Infrastructure in Manhattan leaks three to five times more natural gas than cities with newer infrastructure \citep{gallagher_natural_2015} and of the 6,400 miles of gas main lines running under New York City's streets, 53% were installed prior to 1960. In 2012, Con Edison experienced 83 leaks for every 100 miles of gas main. Furthermore, replacing a main in NYC can cost from $2.2 million to $8 million per mile, so prioritizing investment is critical. \citep{forman_caution_2014}