Onshore Natural Gas Pipelines

We own or have interests in approximately 19,800 miles of onshore natural gas pipeline systems that provide for the gathering and transportation of natural gas in Alabama, Colorado, Louisiana, Mississippi, New Mexico, Texas and Wyoming. This includes gathering and transmission of natural gas from onshore developments, such as the San Juan, Barnett Shale, Permian, Piceance, Greater Green River, Haynesville and Eagle Ford supply basins in the western United States and from offshore developments in the Gulf of Mexico through connections with offshore pipelines. Typically, these systems receive natural gas from producers, other pipelines or shippers through system interconnects and redeliver the natural gas to processing facilities, local gas distribution companies, industrial or municipal customers or to other onshore pipelines.

Enterprise's Texas Intrastate System gathers and transports natural gas from supply basins in Texas (from both onshore and offshore sources) to local gas distribution companies and electric generation and industrial and municipal consumers, as well as to connections with intrastate and interstate pipelines. This system serves important natural gas producing regions and commercial markets in Texas, including Corpus Christi, the San Antonio/Austin area, the Beaumont/Orange area and the Houston area, including the Houston Ship Channel industrial market.  The Texas Intrastate System is comprised of the 6,653-mile Enterprise Texas pipeline system, the 641-mile Channel pipeline system, the 660-mile Waha gathering system and the 174-mile TPC Offshore gathering system.  It also includes a 265-mile pipeline we lease from an affiliate of Energy Transfer Partners.  

The partnership's San Juan Gathering System serves natural gas producers in the San Juan Basin of New Mexico and southern Colorado.  This system gathers natural gas from production wells in the San Juan Basin and delivers the natural gas to regional processing plants, including our Chaco plant, located in New Mexico for ultimate delivery into major interstate pipelines.

The Jonah Gathering System is located in the Greater Green River Basin of southwest Wyoming.  This system gathers natural gas from the Jonah and Pinedale fields for delivery to regional natural gas processing plants, including our Pioneer plant for ultimate delivery into major interstate pipelines.

The Piceance Basin Gathering System consists of the 52-mile Piceance Creek, the 32-mile Great Divide and the 22-mile Collbran Valley gathering systems located in the Piceance Basin of northwestern Colorado.  The Piceance Creek gathering system extends from a connection with the Great Divide gathering system to our Meeker natural gas processing plant and ultimate delivery into the White River Hub and other major interstate pipelines.  The Great Divide gathering system gathers natural gas from the southern portion of the Piceance Basin, including natural gas gathered on the Collbran Valley gathering system, to an interconnect with our Piceance Creek gathering system.

The White River Hub, a regulated interstate natural gas transportation hub facility, connects to six interstate natural gas pipelines in northwest Colorado and has a gross capacity of 3 Bcf/d of natural gas.

The Acadian Gas System purchases, transports, stores and resells natural gas in Louisiana.  The Acadian Gas System is comprised of the 576-mile Cypress pipeline, the 438-mile Acadian pipeline and the 27-mile Evangeline pipeline.

In July 2010, we completed and placed the final segment of our Trinity River Lateral natural gas pipeline into service.  The Trinity River Lateral pipeline, which is part of our Enterprise Texas pipeline system, extends approximately 42 miles from the Trinity River Basin of north Arlington, Texas to an interconnect near Justin, Texas with our Sherman Extension pipeline.  The Trinity River Lateral provides producers in Tarrant and Denton Counties in North Texas with up to 1.0 Bcf/d of production takeaway capacity.

In May 2010, we completed the purchase of the State Line and Fairplay natural gas gathering and treating systems from subsidiaries of M2 Midstream.  Located in northwest Louisiana and East Texas, these assets gather natural gas produced from the Haynesville/Bossier Shales and the Cotton Valley and Taylor Sands formations and will complement the extension of Enterprise’s Acadian pipeline system, which will provide shippers with takeaway capacity from the growing Haynesville Shale.

In October 2009, we and Duncan Energy Partners announced plans to extend our Acadian Gas System into the rapidly growing Haynesville Shale supply basin in northwest Louisiana. Our 270-mile Haynesville Extension pipeline will have transportation capacity of up to 1.8 Bcf/d of natural gas and will extend from our existing Acadian Gas System to the Haynesville, Louisiana production region.  The pipeline is also planned to interconnect with interstate pipelines in central and southern Louisiana.  The Haynesville Extension will provide producers in the Haynesville Shale supply basin with takeaway capacity, including access to more than 150-end-use markets along the Mississippi River corridor between Baton Rouge and New Orleans, Louisiana.  In addition, shippers will be able to access our Napoleonville salt dome storage cavern and have the ability to make physical deliveries into the Henry Hub and benefit from more favorable pricing points.  The pipeline is expected to be completed in September 2011.

Onshore Natural Gas Pipelines
Facility	Ownership Interest	Miles	Operator	Function
Texas Intrastate System	100%(1)	8,128	Enterprise	Intrastate pipeline system that gathers and transports natural gas from supply basins in Texas and offshore in the Gulf of Mexico for delivery to local gas distribution companies and electric generation and industrial customers.
San Juan Gathering System	100%	6,070	Enterprise	Extensive natural gas gathering system serving producers in the San Juan Basin of New Mexico. It delivers production to the Chaco and San Juan natural gas processing facilities, with natural gas ultimately delivered into El Paso Natural Gas Pipeline. It delivers NGL to Mid-America NGL Pipeline and Wingate.
Acadian Gas System	Various (2)	1,041	Enterprise	Transports natural gas from onshore developments and, through connections with offshore pipelines, Gulf of Mexico production to local gas distribution companies, electric generation and industrial customers, including those in the Baton Rouge-New Orleans-Mississippi River corridor.
Carlsbad Gathering System	100%	919	Enterprise	Gathers natural gas from wells in the Permian Basin region of Texas and New Mexico and delivers natural gas into the El Paso Natural Gas, Transwestern and Oasis pipelines.
Jonah Gas Gathering System	100%	849	Enterprise	Gathers natural gas from the Jonah and Pinedale fields in Wyoming for delivery to regional natural gas processing plants, including our Pioneer facility, and major interstate pipelines.
Encinal Gathering System	100%	589	Enterprise	Gathers natural gas from the Olmos and Wilcox formations in south Texas and delivers into our Texas Intrastate System, which delivers the natural gas into our facilities in south Texas for processing.
Alabama Intrastate System	100%	408	Enterprise	Gathers natural gas from the coal bed methane producing regions of Alabama.
Val Verde Gas Gathering System	100%	467	Enterprise	Gathers coal bed methane from the Fruitland Coal Formation of the San Juan Basin in northern New Mexico as well as conventional gases.
Piceance Basin Gathering System	100%	106	Enterprise	Gathers natural gas from wells in the Piceance Basin located in Colorado.
White River Hub	50%(3)	10		Provides natural gas transportation and hub services in northwest Colorado.
State Line Gathering System	100%	188	Enterprise	Gathers natural gas produced from the Haynesville/Bossier Shales and Cotton Valley and Taylor Sand formation in Louisiana and eastern Texas.
Fairplay Gathering System	100%	249	Enterprise	Gathers natural gas produced from the Haynesville/Bossier Shales and Cotton Valley and Taylor Sand formation in Louisiana and eastern Texas.
Other (5 systems) (4)	Various (5)	754	Enterprise	A system of three pipelines located in Texas and Mississippi that gather area production and are integral components of our natural gas storage operations.