The Pipeline Safety Enhancement Plan (PSEP) established as a result of the 2010 tragedy in San Bruno, California where a 30-inch diameter steel natural gas pipeline exploded. The USGS measured the explosion and shock wave as a magnitude 1.1 earthquake. In the aftermath, the California Public Utilities Commission (CPUC) mandated that all natural gas transmission operators throughout the state develop a plan to test, or replace, all high pressure transmission pipelines exceeding 3 inches in outside diameter, and the associated valves, throughout their systems that had not been tested. To date, ATM has completed nine separate PSEP mapping projects, the first of those being the Line 2000 Bridge in 2014 located along the I-10 just east of Blythe, California. ATM provided forty scale mapping with one foot topographic information, full planimetric detail, and Color orthophotography.