The Haynesville basin is positioned for sustained production growth over the next 12 months, supported by a critical factor: existing southbound pipeline capacity that remains significantly underutilized. This report quantifies the spare transportation capacity across the four major Haynesville gathering systems (LEAP, LEG, NG3, and Gulf Run) and demonstrates that current infrastructure can absorb forecast production growth through Q1 2027, bridging the gap until the next wave of pipeline expansions arrives in 2027-2028.
Haynesville total dry gas production currently stands at approximately 16.6 Bcf/d (March 2026), having recovered from the 2024 downturn driven by low natural gas prices and producer DTILing. Our long term forecast projects production climbing to approximately 17.8 Bcf/d by March 2027, representing growth of roughly 1.2 Bcf/d (+7.1%) over the next 12 months.
Our analysis of Total Scheduled Quantity (TSQ) data at 13 interstate pipeline receipt points connected to the LEAP, LEG, and NG3 gathering systems reveals approximately 1.66 Bcf/d of combined spare capacity, with the systems operating at just 69.3% aggregate utilization.
Including Gulf Run (estimated at ~67% utilization), total southbound spare capacity rises to approximately 2.2 Bcf/d. This spare capacity comfortably exceeds the forecast 1.3 Bcf/d production growth, leaving a margin of roughly 0.9 Bcf/d. The growth runway exists because two major gathering systems — LEG (Williams, 47% utilized) and NG3 (Momentum Midstream, 70% utilized) — only entered service in mid-to-late 2025 and are still ramping volumes. LEAP (DT Midstream) is the tightest system at 89% utilization, but its Phase 4 expansion (+0.2 Bcf/d) is expected online by mid-2026.
Summary
The Haynesville basin has room to grow. Existing pipeline infrastructure can support the near-term production ramp without constraint, and the 2027-2028 buildout cycle will unlock even greater capacity for the basin's long-term production growth trajectory.
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