NGL Pipelines Overview

Enterprise owns interests in 13,758 miles of NGL pipelines and 154.9 million barrels of NGL and petrochemical storage capacity. These NGL pipelines transport mixed NGLs and other hydrocarbons from natural gas processing plants to fractionation facilities; distribute and receive NGL products to and from petrochemical plants and refineries; and deliver propane to customers along the Dixie pipeline and certain sections of the Mid-America Pipeline System. Our pipelines provide transportation services to customers on a fee basis; therefore, the gross operating margin for this business is generally dependent upon the volume of product transported and the level of fees charged to customers. Typically, our pipeline customers retain title to the NGL products and the associated commodity price risk.

Enterprise's most significant NGL pipelines are the Mid-America and Seminole pipeline systems which total 9,150 miles. The Mid-America system is a regulated NGL pipeline system consisting of three NGL pipelines: the 2,785-mile Rocky Mountain pipeline, the 2,771-mile Conway North pipeline and the 2,252-mile Conway South pipeline.

The Rocky Mountain section of the pipeline transports mixed NGLs from the Rocky Mountain Overthrust and San Juan Basin areas to the Hobbs hub Located on the Texas-New Mexico border. The Conway North segment links the large NGL hub at Conway, Kansas to refineries, petrochemical plants and propane markets in the upper Midwest. In addition, the Conway North segment has access to NGL supplies from Canada's Western Sedimentary basin through connections with third-party pipelines. The Conway South pipeline, which completed an expansion in 2007, connects the Conway hub with Kansas refineries and transports NGLs from Conway to the Hobbs hub where the Mid-America system interconnects with the Seminole pipeline system.

The Seminole pipeline is a regulated pipeline that transports mixed NGLs and NGL products from the Hobbs hub and the Permian Basin area to Mont Belvieu. The primary source of throughput for Seminole is the volume originating from the Mid-America system. In general, mixed NGLs transported on the Seminole pipeline are transported to fractionation facilities in Mont Belvieu for separation and ultimate consumption by petrochemical customers and motor gasoline producers on the Texas Gulf Coast.

Because of strong drilling activity and increasing production of rich natural gas and associated NGLs in the Pinedale, Piceance and San Juan basins, our Mid-America system is operating near full capacity and NGLs that are dedicated to the partnership or our NGL fractionator at Mont Belvieu continue to exceed our capacity. As a result, in October 2007, we completed the expansion of the Rocky Mountain portion of our Mid-America Pipeline system. The final phase of this project consisted of installing new pumps and the modification of existing pumps, which increased system capacity by 20 MBPD. The first phase, which was completed in April 2007, provided an additional 30 MBPD of system capacity. Overall, these expansion projects increased the capacity of MAPL's Rocky Mountain system from 225 MBPD to 275 MBPD. This expansion will accommodate expected mixed NGL volumes originating from our Meeker, Pioneer and Chaco facilities.

In December 2006, we acquired an additional 8.2% interest in the Dixie Pipeline Company. Enterprise now owns 74.2% of the company. Dixie Pipeline Company owns and operates the Dixie Pipeline, a 1,371-mile propane pipeline that transports over 100 MBPD of propane from Mont Belvieu and 9 other receipt points to markets at its eastern termination points in North Carolina and Georgia, as well as 7 intermediate delivery terminals.

Facility	Ownership Interest	Miles	Operator	Function
NGL Pipelines
Mid-America Pipeline System	100.0%	7,808	Enterprise	Transports mixed NGLs produced from over 20 natural gas processing plants in Wyoming, Utah, Colorado and New Mexico to the Seminole pipeline in West Texas.
Dixie Pipeline	74.2% ⁽¹⁾	1,371	Phillips	Transports propane from fractionators and refineries in Texas, Louisiana, and Mississippi to customers throughout the Southeast.
Seminole Pipeline	90.0%⁽²⁾	1,342	Enterprise	Transports mixed NGLs and NGL products received from the Mid-America pipeline in West Texas and from pipelines and processing plants in the Permian basin to the large NGL markets at Mont Belvieu, Texas and the Texas Gulf Coast.
EPD South Texas NGL System⁽²⁾	100%	1,039	Enterprise	Gathering and transportation pipelines that deliver mixed NGLs to fractionators and NGL products to refineries and petrochemical plants located along the Texas Gulf Coast.
Louisiana Pipeline System	Various⁽³⁾	612	Enterprise and Equilon	Gathering and transportation pipelines that deliver mixed NGLs to fractionators and NGL products to refineries and petrochemical plants located along the Gulf Coast.
Promix Pipeline System	50.0%	364	Enterprise	Gathers mixed NGLs from 12 natural gas processing plants in Louisiana.
Lou-Tex NGL Pipeline	100%	205	Enterprise	Transports NGL products and refinery grade propylene between Louisiana and Texas; and transports mixed NGLs from Louisiana gas processing facilities to the Mont Belvieu, Texas NGL fractionation facility.
Houston Ship Channel Pipeline System	100%	266	Enterprise	Bi-directional system comprised of 6 pipelines from Enterprise's Mont Belvieu complex to refineries and petrochemical customers along the Houston Ship Channel. Also serves import/export facilities.
Tri-States Pipeline	66.7%	194	BP	Transports y-grade from processing plants in Alabama and Mississippi to Baton Rouge, Louisiana and Promix NGL fractionators.
Chunchula Pipeline	100%	144	Enterprise	Transports y-grade from Florida and Alabama to the Petal fractionator.
Wilprise Pipeline	74.7%	30	Enterprise	Transports y-grade from Tri-States pipeline to the Baton Rouge fractionator.
Belle Rose Pipeline	41.7%	48	Enterprise	Transports y-grade from Tri-States Pipeline to the Promix fractionator.
Meeker Pipeline⁽⁴⁾	100%	49	Enterprise	Transports NGLs from our Meeker natural gas processing facility to the Mid-America Pipeline System.
DEP South Texas NGL Pipeline System ⁽⁵⁾	DEP - 66% EPD - 34%	286		Gathering and transportation pipelines that deliver mixed NGLs to fractionators and NGL products to refineries and petrochemical plants located along the Texas Gulf Coast

⁽¹⁾ We hold a 74.2% interest in this system through a majority owned subsidiary, Dixie Pipeline Company.
⁽²⁾ We hold a 90% interest in this system through a majority owned subsidiary, Seminole Pipeline Company.
⁽³⁾ Of the 612 total miles for this system, we own 100% of 559 miles and 43.5% of the remaining 53 miles.
⁽⁴⁾ Meeker Pipeline was completed in 2007.
⁽⁵⁾ Reflects consolidated ownership of this system by Duncan Energy Partners (66%) and Enterprise Products Operating LLC (34%).