{"index":"DCGI midstream operator registry","license":"CC BY 4.0","note":"Parent midstream companies mapped to the FERC pipeline entities they operate, with live segment counts from EIA pipeline geodata. The gas behind the grid.","ok":true,"operators":[{"hq":"Houston, TX","key":"kinder_morgan","matched_entities":["Colorado Interstate Gas Co","East Tennessee Gas Co","El Paso Natural Gas Co","Kinder Morgan Louisiana Pipeline","Kinder Morgan Texas Pipeline Co","Mojave Pipeline Co","Sierrita Gas Pipeline","Southern Natural Gas Co","Tennessee Gas Pipeline","Wyoming Interstate PL Co"],"name":"Kinder Morgan","note":"~66k mi; largest US natural-gas transporter.","pipeline_segments":3016,"tracked":true,"type":"Interstate transmission"},{"hq":"Calgary, AB","key":"tc_energy","matched_entities":["ANR Pipeline Co","Columbia Gas Trans Co","Columbia Gulf Pipeline","Crossroads Pipeline Co","Great Lakes Gas Trans Co","Portland Natural Gas PL"],"name":"TC Energy","note":"Columbia + ANR; major Appalachia / Midwest takeaway.","pipeline_segments":2315,"tracked":true,"type":"Interstate transmission"},{"hq":"Des Moines, IA","key":"berkshire","matched_entities":["Cove Point Pipeline","Dominion Transmission Co","East Ohio Gas Co","Kern River Gas Trans Co","Northern Natural Gas Co"],"name":"Berkshire Hathaway Energy (Northern Natural / Eastern Gas)","note":"Northern Natural (largest by mileage) + Eastern Gas (ex-Dominion).","pipeline_segments":2201,"tracked":true,"type":"Interstate transmission"},{"hq":"Tulsa, OK","key":"oneok","matched_entities":["Guardian Pipeline Co","ONEOK Gas Transmission LLC","ONEOK Gas Transportation LLC","ONEOK Westex Pipeline","Roadrunner","Roadrunner Eastbound","Viking Gas Transmission Co"],"name":"ONEOK","note":"Mid-continent NGL + gas (incl. Magellan assets).","pipeline_segments":1865,"tracked":true,"type":"Gathering + transmission"},{"hq":"Houston / Calgary","key":"enbridge","matched_entities":["Algonquin Gas Trans Co","Enbridge Pipelines (AlaTenn)","Enbridge Pipelines (East Texas)","Enbridge Pipelines (UTOS)","Maritimes & Northeast PL US","PNGTS/Maritimes & Northeast","Texas Eastern Trans Co"],"name":"Enbridge (incl. Texas Eastern)","note":"Texas Eastern (TETCO) is a key Gulf -> Northeast corridor.","pipeline_segments":1368,"tracked":true,"type":"Interstate transmission"},{"hq":"Tulsa, OK","key":"williams","matched_entities":["Northwest Pipeline","TransColorado Gas Trans Co","Transcontinental Gas PL"],"name":"Williams (Transco)","note":"Transco is the largest-volume US pipeline (Gulf -> Northeast).","pipeline_segments":1296,"tracked":true,"type":"Interstate transmission"},{"hq":"Dallas, TX","key":"energy_transfer","matched_entities":["Energy Transfer","Florida Gas Trans Co","Midcontinent Express Pipeline","Panhandle Eastern PL Co","Rover Pipeline","Sea Robin Pipeline","Transwestern Gas Co","Trunkline Gas Co"],"name":"Energy Transfer","note":"~125k mi; one of the largest US midstream systems (Gulf, Midcon, FL).","pipeline_segments":1108,"tracked":true,"type":"Interstate transmission"},{"hq":"Houston, TX","key":"boardwalk","matched_entities":["Gulf South Pipeline Co","Texas Gas Transmission Co"],"name":"Boardwalk Pipelines","note":"Gulf South + Texas Gas; Gulf Coast / Southeast.","pipeline_segments":968,"tracked":true,"type":"Interstate transmission"},{"hq":"Lakewood, CO","key":"tallgrass","matched_entities":["Rockies Express (Echo Springs Lateral)","Rockies Express (Entrega)","Rockies Express Pipeline","Trailblazer Pipeline Co"],"name":"Tallgrass Energy","note":"Rockies Express (REX): bidirectional Rockies / Appalachia.","pipeline_segments":109,"tracked":true,"type":"Interstate transmission"},{"hq":"Las Vegas, NV","key":"southwest_gas","matched_entities":["Paiute Pipeline Co","Southwest Gas Corp"],"name":"Southwest Gas","note":"AZ / NV / CA distribution; Paiute interstate feeds Nevada.","pipeline_segments":61,"tracked":true,"type":"Local distribution (LDC)"},{"hq":"Detroit, MI","key":"dt_midstream","matched_entities":["Millennium Pipeline Co","Vector Pipeline Co"],"name":"DT Midstream","note":"Appalachia gathering + interstate.","pipeline_segments":36,"tracked":true,"type":"Transmission + gathering"},{"hq":"St. Louis, MO","key":"spire","matched_entities":["Spire St. Louis Pipeline"],"name":"Spire","note":"Midwest / Gulf distribution + Spire STL pipeline.","pipeline_segments":2,"tracked":true,"type":"LDC + transmission"}],"total_distinct_operators_tracked":284}