Enterprise Products Partners and Duncan Energy Partners (a subsidiary of Enterprise) announced Tuesday that their jointly owned Acadian pipeline will expand into the Haynesville Shale. The Haynesville Extension will be 249 miles long and be comprised of 30" and 36" diameter pipe. It will have a 1.4 Bcf/day capacity and interconnect with the Enterprise's Acadian and Cypress Gas Pipeline systems to the south. The development calls for two compressor stations with a combined 67,000 horsepower. The pipeline is expected to be in service by September 2011. At first, it will connect to nine Haynesville producer locations in DeSoto and Red River Parishes.