Operations

Onshore Natural Gas Pipelines

We own or have interests in 20,201 miles of onshore natural gas pipelines that provide for the gathering and transportation of natural gas in Colorado, Louisiana, 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 Shale 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 6,917-mile Enterprise Texas pipeline system, the 634-mile Channel pipeline system, the 708-mile Waha gathering system and the 152-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 1,600-mile Piceance Basin Gathering System consists of the Piceance Creek, the Great Divide and the 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 590-mile Cypress pipeline, the 442-mile Acadian pipeline, the 270-mile Haynesville extension, and the 27-mile Evangeline pipeline.

In August 2011, we sold our Alabama Intrastate System which was not integrated with our other midstream energy assets.

In November 2011, commercial operations on the Haynesville Extension of our Acadian Gas System commenced. As a result of completing the Haynesville Extension project, we have provided producers in Louisiana's Haynesville and Bossier Shale plays with access to 1.8 Bcf/d of incremental natural gas takeaway capacity. As an extension of our Acadian Gas System, the Haynesville Extension offers producers access to more than 150 end-user customer service locations along the Mississippi River industrial corridor between Baton Rouge and New Orleans, as well as the Henry Hub. The Haynesville Extension features interconnects with 12 interstate pipeline systems and is the only southbound option that avoids potential natural gas supply bottlenecks at the Perryville Hub and offers producers flow assurance and market choice to assist in maximizing the value of their natural gas.

Facility	Ownership Interest	Miles	Operator	Function
Onshore Natural Gas Pipelines
Texas Intrastate System	Various⁽¹⁾	8,411	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%⁽³⁾	6,558	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⁾	1,329	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. Includes Haynesville Extension Pipelines.
Carlsbad Gathering System	100%	953	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%	925	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.
Haynesville Gathering Systems	100%⁽⁵⁾	295	Enterprise	Gathers natural gas produced from the Haynesville and Bossier Shale supply basins and the Cotton Valley and Taylor Sand formations in Louisiana and eastern Texas for delivery to several downstream markets including the Haynesville Extension of our Acadian Gas System.
Piceance Basin Gathering System	Colorado	190	Enterprise	Gathers natural gas from wells in the Piceance Basin located in Colorado.
White River Hub	50%⁽⁴⁾	10		Provides natural gas transportation and hub services in northwest Colorado.
Fairplay Gathering System	100%⁽⁶⁾	250	Enterprise	Gathers natural gas produced from the Haynesville/Bossier Shales and Cotton Valley and Taylor Sand formation in Louisiana and eastern Texas.
Other (4 systems)	Various ⁽⁷⁾	1,280	Enterprise	A system of four pipeline systems located in Texas that gather area production and are integral components of our natural gas storage operations.

⁽¹⁾ The Texas Intrastate system also includes pipelines in which Enterprise owns an undivided interest.

⁽²⁾ The Acadian Gas System is wholly owned except for the 27-mile Evangeline pipeline and we hold under an operating lease.

⁽³⁾ In 2011, we completed the integration of the Val Verde Gas Gathering System we acquired in the TEPPCO Merger into our legacy San Juan Gathering System.

⁽⁴⁾ Our ownership interest in the White River Hub facility is held indirectly through our equity method investment in White River Hub, LLC.

⁽⁵⁾ Haynesville Gathering Systems consist of the State Line gathering system that we acquired in May 2010 and the South East Mansfield gathering system and South East Stanley gathering system that we constructed and placed into service during 2010 and 2011, respectively.

⁽⁶⁾ We acquired the Fairplay Gathering System in May 2010.

⁽⁷⁾ Includes the Delmita, Big Thicket, Indian Springs and South Texas gathering systems located in Texas. We proportionately consolidate our undivided interest in the Indian Springs Gathering System.