Four Corners Pipeline - Tonalea: Oil Pipeline in Coconino County, Arizona

Four Corners Pipeline - Tonalea is an operational oil pipeline facility located in Tonalea, Arizona, within Coconino County. As part of the broader Four Corners pipeline network, it serves the oil transportation infrastructure in the southwestern United States, a region with significant energy production and distribution activities. The facility operates under the regulatory oversight of the US Pipeline and Hazardous Materials Safety Administration (PHMSA) and complies with DOT 49 CFR Part 195, which governs hazardous liquid pipelines. The facility is classified under NAICS code 486110 for crude petroleum pipeline transportation, indicating its role in long-distance oil transport. This pipeline contributes to the regional energy grid by connecting oil production areas to refineries and distribution hubs. Its location in the Colorado Plateau region places it within an area of ecological and cultural significance, requiring careful operational management to minimize environmental impact. The facility's operational status underscores its ongoing role in supporting energy supply chains in the western United States.

The pipeline traverses the Colorado Plateau, a region characterized by arid landscapes, canyons, and sensitive ecosystems. Proximity to waterways and populated areas necessitates robust spill prevention and cathodic protection measures to mitigate corrosion risks. The commodity transported (oil) poses potential environmental hazards, requiring compliance with PHMSA's integrity management programs to protect local water resources and wildlife habitats.