Third party damage is the most common natural gas related problem. This damage typically occurs when contractors dig into gas lines. Puget Sound Energy works closely with local fire departments in responding to these incidents. Additionally, they are training contractors in system design so that they will be more aware of where pipelines are likely to be. Individual customer systems are vulnerable to flood damage and earthquake damage.
Floods can put pilot lights out that can lead to leaking.
Earthquakes can cause water heaters to fall over causing leaking or fires. Natural gas users should be educated in water heater safety, including methods of strapping down water heaters as well as the option of earthquake protection valves which stop the flow of gas when the earth shakes. Natural gas shortages are rare but tend to occur during cold weather. These shortages are a function of infrastructure and demand. During unusually cold weather events the demand for natural gas can exceed the carrying capacity of the natural gas company s pipeline infrastructure.