Grand Canyon National Park Water Supply Appraisal Study
GRAND CANYON NATIONAL PARK WATER SUPPLY APPRAISAL STUDY COCONINO, MOHAVE, AND YAVAPAI COUNTIES, ARIZONA PREPARED FOR NATIONAL PARK SERVICE GRAND CANYON NATIONAL PARK GRAND CANYON, ARIZONA PREPARED BY BUREAU OF RECLAMATION PHOENIX AREA OFFICE, PHOENIX, ARIZONA TECHNICAL SERVICE CENTER, DENVER, Colorado January 2002 GRAND CANYON NATIONAL PARK WATER SUPPLY APPRAISAL STUDY COCONINO, MOHAVE, AND YAVAPAI COUNTIES, ARIZONA PREPARED FOR NATIONAL PARK SERVICE GRAND CANYON NATIONAL PARK GRAND CANYON, ARIZONA PREPARED BY BUREAU OF RECLAMATION PHOENIX AREA OFFICE, PHOENIX, ARIZONA TECHNICAL SERVICE CENTER, DENVER, Colorado January 2002 Executive Summary Study Purpose The Bureau of Reclamation (Reclamation) conducted this appraisal study to develop potentially viable options (alternatives) that would provide a treated water supply to the North and South Rims of Grand Canyon National Park (Park) through the year 2050. The alternatives could be further investigated at a feasibility level of study, with the intent of developing a preferred plan. Study Need Estimated water use at the Park in 1999 was 194.1 million gallons, or 596 acre-feet (af) a year. Based on National Park Service (NPS) projections, increased visitor growth would about double this water use by the year 2050 to 1,255 af per year. Currently, the 12.5-mile-long transcanyon pipeline (TCP) delivers water from Roaring Springs (located about 3,000 feet below the North Rim) to the North Rim by pumping and by gravity flow to Indian Garden, located about 3,000 feet below the South Rim. Water is then pumped from Indian Garden to water storage tanks on the South Rim before it is delivered to developed areas along the South Rim.
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