![]() Most residents of the Shiprock area obtain local coal at little or no cost. Both existing power plants are exempt from regulation under the US Environmental Protection Agency 1990 Amendments to the Clean Air Act due to their age. Two features make the Shiprock area somewhat unique on the reservation: atmospheric thermal inversions trap air pollution low to the ground, especially in winter, and two large mine-mouth coal-fired power plants are located in the vicinity, with a third plant in the planning stages. The Shiprock area is located in the northeastern part of the reservation part of the area is in the San Juan River valley. #BLACK MESA CONTENT FILE LOCKED FREE#Many people who live in the eastern San Juan Basin (Shiprock area), despite having access to free coal from the Navajo mine, nevertheless choose to purchase Black Mesa coal at local flea markets due to its superior quality. The Fruitland coal is lower in calorific value (10,646 +/− 1590 BTU/pound) and higher in ash content (22.24 +/− 7.02%) than coals found in other areas of the Navajo Nation, such as Black Mesa (10,910–11,560 BTU/pound, 4.7–9.1%). The free coal comes from the Late Cretaceous Fruitland Formation and is relatively low rank (subbituminous to high-volatile bituminous). As part of the lease agreement, BHP is required to provide coal for domestic use free of charge to Navajos who reside within a certain radius from the mine. īroken Hill Proprietary Minerals (BHP Billiton Limited) leases the coal mines from the Navajo Nation. Most of the generated power is transmitted off the reservation by high-voltage lines to customers in Arizona cities, Las Vegas, Nevada, and even Los Angeles, California-over a thousand kilometers away. If regarded as a single entity, the two plants are the second largest consumer of coal in the nation. The owners of this second coal-fired power plant in the Shiprock area include Power New Mexico, Tucson Electric Power, the Southern California Public Power Authority, and the City of Anaheim, California. Located less than 10 km from the Four Corners plant is the 1,800 megawatt capacity San Juan Generating Station. The total generating capacity of the Four Corners Power Plant is 2,040 megawatts. and Arizona Public Service Companies developed the Four Corners Power Plant adjacent to the mine, and coal deliveries to the first three units of the plant started in 1962. signed a contract for the mining of coal on the reservation. In 1957, the Navajo tribe and Utah International Inc. The climate on the reservation is typical of American Southwest high deserts: hot in the summer, cold in the winter, with little precipitation and low humidity. Almost 175,000 people live within the boundaries of the sovereign Navajo Nation, an American Indian reservation located in the Four Corners area of Arizona, Colorado, New Mexico, and Utah. Among these are members of the Navajo Nation. Within the United States (USA), a large group of people still use significant amounts of coal for home heating and some cooking. ![]()
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