Frontier Refining & Marketing, a subsidiary of Frontier Holdings Inc. (which is a subsidiary of Frontier Oil Corporation), operates all of Frontier Oil's marketing, crude and product supply, planning, human resources, and accounting functions. Frontier Refining & Marketing primarily sells its gasoline and diesel to unbranded jobbers, but it also supplies retail operations of other oil companies. The company itself has no retail marketing locations, but does allow jobbers to use the Frontier logo on their retail outlets. Frontier Refining & Marketing is also a major marketer of asphalt to the Front Range area.

Petrolifera Petroleum makes its living from the natural resources of South America. As a crude oil and natural gas exploration and production company, Petrolifera operates on more than 8 million acres of land located in Peru, Colombia, and Argentina. Petrolifera Petroleum Limited Argentine-based operations, which constitute the company's largest source of revenue, include a 100% stake in the Puesto Morales/Rinconada Concession in the Neuquen Basin. In 2007, Petrolifera produced an average of 8,000 bbl/d (barrels per day) of crude oil and more than 2,100 mcf/d (thousand cubic feet per day) of natural gas. Petrolifera Petroleum Limited largest shareholder is oil production company Connacher Oil and Gas, which owns about 25% of the company.

DCP Midstream Partners, LP is a midstream master limited partnership formed by DCP Midstream, LLC to own, operate, and continue to broaden our portfolio of complementary midstream assets. The Partnership gathers, treats, processes, transports, and markets natural gas and natural gas liquids (NGLs) and is a leading wholesale distributor of propane. Supported by our relationship with DCP Midstream, LLC, and its parents, Spectra Energy and ConocoPhillips, our geographically diverse assets, with strong market positions, and our mix of fee-based and substaintially hedged commodity-based margins, position the Partnership for the long term.

Monument Resources, Inc. was founded in 1984 and is based in Denver, Colorado. Monument Resources, Inc. engages in the exploration, development, production, and sale of oil and gas from its properties in the United States. Monument Resources, Inc. also involves in acquiring and brokering mineral, and oil and gas properties, as well as operates a gas pipeline. Monument Resources, Inc. offers natural gas and crude oil to various producers, including pipeline companies. It owns interest in the Kansas gas project covering approximately 4,500 acres of oil and gas leases located in Leavenworth County, Kansas. As of September 30, 2008, Monument Resources owned interest in approximately 62 gas wells in Leavenworth County, Kansas. Monument Resources, Inc. was formerly known as Monument Resource Development, Inc. and changed its name to Monument Resources, Inc. in June 1987.

Originally a shipping company, Siem Offshore has become a major player in the oil field services industry. Siem Offshore Inc. has a fleet of 27 vessels, including platform supply vessels (PSVs), multipurpose field- and remotely operated vehicle (ROV) support vessels, multi-role support vessels (MRSVs), anchor handling tug support vessels, a well stimulation vessel, a scientific core drilling vessel and crew boats. Siem Offshore Inc. also conducts technology research and development for the drilling and well services industries through Siem WIS AS and WellCem AS. Norwegian shipping conglomerate Siem Industries owns about 34% of Siem Offshore. Our goal is to become a preferred supplier based on quality, reliability and cost efficiency. Siem Offshore Inc. modern fleet and company culture will help to achieve goals. The current newbuilding program of 14 vessels represents a significant increase of future service capacity, including the variety of services to be offered by the new, high capacity AHTS vessels. Siem Offshore Inc. vessel services are supported through offices in Norway, Brazil and the Cayman Islands.

C & C provides a wide range of survey and mapping services for the land and offshore oil and gas industry, the telecommunications industry and the U.S. government. The company has divisions including Land and Transition Zone Survey Division, the Marine Construction Survey Division, the Geophysical and Geoscience Division, the Geotechnical Division and the Worldwide DGPS Services Division. C & C’s operational divisions are sustained by several in-house support functions including a database department, a systems development department, an information technology department, an electronics department, a mechanical fabrication department, as well as an HSE and QA department.

rek Resources, Inc. is an independent energy company that is engaged in the exploration, development, exploitation and acquisition of on-shore oil and natural gas properties in conventional producing areas of the United States. Trek Resources, Inc. originally incorporated our company in the State of Utah in 1983 under the name of Quasar-Tech, Inc. Trek Resources is on has it exploring for and producing oil and natural gas primarily in Texas and Oklahoma, but also in New Mexico. Trek Resources, Inc. business strategy is to refurbish and improve the production potential of existing oil and gas producing properties and to develop non-producing and undeveloped reserves on other properties that it owns. Formerly a publicly traded company, Trek Resources was taken private in a reverse stock split in May 2005; chairman and CEO Michael Montgomery owns a controlling stake in the company.

JAPEX is at the apex of Japan's oil and gas industry. Japan Petroleum Exploration (JAPEX) explores for and produces oil and gas in Japan and around the world and has proved reserves of 272 million barrels of oil equivalent. Japan Petroleum Exploration Co. exploration and production division sells crude oil, natural gas, and liquefied natural gas (LNG). Another division contracts for drilling projects and geological and geophysical surveys. Other operations include the sale of petroleum products such as LPG and fuel oil. Expanding its portfolio, in 2009 JAPEX acquired the oil product sales unit of a Mitsubishi Materials subsidiary. The Japanese government controls 34% of JAPEX.

Hughes Christensen has made a name for itself in the oil and gas industry. Hughes Christensen Company, a division of Baker Hughes, manufactures diamond drill bits and Tricone bits (three toothed, with conical cutters) primarily for customers in the oil and gas industry. Hughes Christensen also offers advance log and rock strength analysis and drilling optimization services. Hughes Christensen Company operates a manufacturing facilitie in the US which produces Tricone bits, and in Germany, Singapore, the US, and Venezuela (producing diamond bits). Hughes Christensen sells its products through offices worldwide.

Enbridge Energy Management, bridging the gap over a complex structure of pipeline partnerships, manages and controls the business of Enbridge Energy Partners (formerly Lakehead Pipe Line Partners). The company's only asset is its 10% limited partner interest and 2% general partner interest in Enbridge Energy Partners, which owns the US part of North America's longest liquid petroleum pipeline (Lakehead System) and also has interests in natural gas gathering, treating, processing, and transmission operations in East Texas. Enbridge Energy Company, a wholly owned subsidiary of Enbridge Inc., holds a 17% stake in the company, and serves as the general partner of Enbridge Energy Partners.

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