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Dedicated Reserves

The volume of recoverable, salable gas reserves committed to, controlled by, or possessed by the reporting pipeline company and used for acts and services for which both the seller and the company have received certificate authorization from the Federal Energy Regulatory Commission (FERC). Reserves include both company-owned reserves (including owned gas in underground storage), reserves under contract from independent producers, and short-term and emergency supplies from the intrastate market. Gas volumes under contract from other interstate pipelines are not included as reserves, but may constitute part or all of a company's gas supply.

Delayed Coking

A process by which heavier crude oil fractions can be thermally decomposed under conditions of elevated temperatures and pressure to produce a mixture of lighter oils and petroleum coke. The light oils can be processed further in other refinery units to meet product specifications. The coke can be used either as a fuel or in other applications such as the manufacturing of steel or aluminum.

Deliverability

Represents the number of future years during which a pipeline company can meet its annual requirements for its presently certificated delivery capacity from presently committed sources of supply. The availability of gas from these sources of supply shall be governed by the physical capabilities of these sources to deliver gas by the terms of existing gas-purchase contracts, and by limitations imposed by State or Federal regulatory agencies.

Department of Energy

The DOE advances the national, economic, and energy security of the United States; to promote scientific and technological innovation in support of that mission; and to ensure the environmental cleanup of the national nuclear weapons complex.

Department of Interior

The DOI builds partnerships to encourage conservation and preserve natural and cultural resources; to bringing innovative approaches to solving land management and water disputes; and to developing energy, including renewable sources of energy, in the most environmentally protective manner.

Department of Justice

The DOJ is a Cabinet department in the United States government designed to enforce the law and defend the interests of the United States according to the law and to ensure fair and impartial administration of justice for all Americans.

Department of Transportation

The DOT supports highway, air, railroad, and maritime and other transportation administration functions.

Distillate Fuel Oil

A general classification for one of the petroleum fractions produced in conventional distillation operations. It includes diesel fuels and fuel oils. Products known as No. 1, No. 2, and No. 4 diesel fuel are used in on-highway diesel engines, such as those in trucks and automobiles, as well as off-highway engines, such as those in railroad locomotives and agricultural machinery. Products known as No. 1, No. 2, and No. 4 fuel oils are used primarily for space heating and electric power generation.

Distribution system

The portion of the transmission and facilities of an electric system or natural gas system that is dedicated to delivering electricity or natural gas to an end-user.

Dow Jones Industrial Average

The index serves as a measure of the entire U.S. market, covering such diverse industries as financial services, technology, retail, entertainment and consumer goods.

Dow Jones Transportation Average

The oldest U.S. stock market index and now consists of the 20 companies to include railroads, shipping, major airlines, air delivery & freight services, trucking, rental & leasing services, regional airlines.

Downstream

Commercial operations that occur from the pipeline that connects to the wellhead or lease site to the market hubs.

Dry Gas

Natural gas which remains after: 1) the liquefiable hydrocarbon portion has been removed from the gas stream (i.e., gas after lease, field, and/or plant separation); and 2) any volumes of nonhydrocarbon gases have been removed where they occur in sufficient quantity to render the gas unmarketable. Note: Dry natural gas is also known as consumer-grade natural gas. The parameters for measurement are cubic feet at 60 degrees Fahrenheit and 14.73 pounds per square inch absolute.

Dual-Fuel Capability

Ability to use more than one fuel to operate a boiler, chiller, generator, or other energy-related equipment.

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