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Western Plateau Planning Area Cultural Water Demand - Overview and Tribal Demand

Figure 6.0-18 Average Annual Western Plateau Planning Area Cultural Water Demand by Sector, 2001-2005 (in acre-feet)

Figure 6.0-18

Total cultural water demand in the Western Plateau Planning Area averaged approximately 9,600 AFA during the period 2001-2005.   As shown in Figure 6.0-18, the agricultural demand sector was the largest use sector with approximately 4,600 AFA of demand, 48% of the total.  With the exception of small pastures, agricultural demand occurs only in the Kanab Plateau and Virgin River basins.  Approximately 57% of agricultural demand was met by groundwater during 2001-2005. Municipal demand represented about 42% of the total planning area demand with an average of approximately 4,000 AFA during the period 2001-2005. Municipal demand was primarily met by groundwater and the municipal sector was the only sector that utilizes effluent.  Industrial demand, primarily related to golf course irrigation, accounted for more than 900 AFA, 10% of the total demand during this period.  Tribal water demand is included in these totals.

Cultural demand volumes varied substantially between planning area basins, ranging from 150 AFA in several basins to over 4,500 AFA in the Virgin River Basin during 2001-2005 (see Figure 6.0-19).

Tribal Water Demand

The largest Indian reservation in the planning area in terms of size is the western portion of the Navajo Reservation, which is also the largest reservation in Arizona.  All of the Havasupai and Kaibab-Paiute reservations and the eastern portion of the Hualapai Reservation are also within the planning area.  The portion of the Hualapai Reservation within the planning area is sparsely populated and its water demand is not known. 

Total tribal water demand in the planning area in 2000 was estimated to be approximately 360 AFA with individual tribal estimates listed in Table 6.0-9.  More recent demand estimates are not available to the Department.  Water demand on the portion of the Navajo Reservation within the planning area is associated with domestic and tourism-related uses at several communities, primarily Cameron but also Gray Mountain, Cedar Ridge and Bodeway (The Gap).  Stockwatering is also a likely use. Approximately 250 acre-feet has been used annually in this area (USBOR, 2006).

Figure 6.0-19

Figure 6.0-19 Average Annual Basin Water Demand, 2001-2005 (in acre-feet)

Table 6.0-9 Tribal Water Demand in the Western Plateau Planning Area in 2000 (in acre-feet)

Table 6.0-9

UNK= Unknown
Source: ADWR 2007a

The Kaibab-Paiute Reservation contains five villages, the largest of which is Kaibab. This Tribe maintains its tribal headquarters, a visitor’s center and other services adjacent to Pipe Springs National Monument near the village of Kaibab. The tribal economy is centered on livestock and tourism as well as agriculture. The Tribe owns a 1,300 tree fruit orchard and may expand agricultural activities (ITCA, 2003).  Water demand in 2000 is estimated at approximately 56 AFA (ADWR, 2007). The nearby community of Moccasin is not located on reservation land and has been the site of the Mohave County Consolidated Court for over 50 years, serving all of Mohave County north of the Colorado River.

The Havasupai use surface water from Havasu Creek and wells completed in shallow stream alluvium along the creek to support the community of Supai and tourism activities.  There is also a small amount of farming on the reservation and stock watering.  Tourism is the economic base for the tribe with more than 12,000 annual visitors to nearby Havasu Falls (ITCA, 2003).  Water demand in 2000 was likely less than 50 AFA  (ADWR, 2007).


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