October 2025 APCA MARKET PENETRATION RESEARCH www.ContinuumCapital.net Market Size by Mileage Summary Findings & Observations Gas Transmission market is bifurcated between relatively steady and routine work on shorthaul segments and stations and much more volatile long-haul activity. Gas transmission is slowly trending down in activity over the timeline presented. As measured by mileage installed, the peaks and valleys are primarily driven by FERC approvals and commodity prices. Hazardous Liquids pipeline growth significantly increased from 2013-2019 and is trending up over the timeline presented. – COVID-19 drastically reduced new construction, and the Biden administration has been very effective at curtailing activity in this market sector. Gathering pipeline growth significantly increased from 2006-2019. Distribution growth is more stable and activity peaked during the 2004-2007 housing boom. Construction timing versus reporting timing results in mileage being constructed 1-2 years before it is reported – particularly true for long-haul, big inch, and interstate pipeline projects. 67
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