SynMax Research: Interstate interconnect flows on LEG (Louisiana Energy Gateway) pipeline have increased since August 29th, 2025, and are negatively impacting total Haynesville LA interstate pipeline production flows.
With LEG being an intrastate pipeline, the negative impact on total Haynesville LA interstate pipeline production flows means that interstate gas is being diverted onto the LEG pipeline. Since August 29th, 2025, when NG3 came online, Haynesville LA interstate pipeline production flows fell by an amount equal to the total interconnect flows on NG3 pipeline and the increase on interstate interconnect flows on LEG. The total change equates to around 0.55 Bcf/d, 0.3 Bcf/d of it coming from NG3 and 0.25 Bcf/d of it coming from LEG. We have already added in the interconnect flows on NG3 of 0.3 Bcf/d for the Haynesville LA production pipeline scrape model estimate. We will now add 0.25 Bcf/d of the interstate interconnect flows on LEG for the Haynesville LA production pipeline scrape model estimate.