HGAP is part of Tellurian's previously announced proposed Tellurian Pipeline Network, a project that represents a US$7 billion investment in US infrastructure and will create approximately 15 000 jobs in Texas and Louisiana. The investment is incremental to the US$15.2 billion investment that Tellurian plans for Driftwood LNG, a proposed LNG export facility near Lake Charles, Louisiana.

President and CEO Meg Gentle said, "HGAP will connect the Haynesville Shale with growing markets in Southwest Louisiana, where natural gas demand is expected to triple, reaching approximately 12 billion ft3/d by 2025. Louisiana continues to serve as the US natural gas market hub, requiring additional infrastructure to efficiently deliver gas from fields in the Northeast US, the Midwest, and Texas to local and global markets. HGAP will improve the connection between North and Southwest Louisiana, debottlenecking existing pipeline routes and providing shippers access to expanding markets."

The proposed pipeline will stretch approximately 200 miles and interconnect with the Midcontinent Express and Gulf Crossing pipelines in Claiborne Parish and to other pipelines located near Gillis in Calcasieu Parish, Louisiana. The pipeline system is anticipated to have multiple receipt and delivery locations, connecting industrial facilities and other third-party pipelines.

The open season will begin on 21 February 2018 at noon (central time), and will run through to 4 pm (central time) on 6 April 2018.