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Prescott AMA Groundwater Conditions

Major aquifers, well yields, estimated natural recharge, number of index wells and date of last water-level sweep are shown in Table 8.3-6Figure 8.3-6 shows aquifer flow direction and water-level change between 1993-1994 and 2004.  Figure 8.3-7 contains hydrographs for selected wells shown on Figure 8.3-6.  Figure 8.3-8 shows well yields in five yield categories.  Underground Storage Facilities (USF) are shown on Table 8.3-7 with facility name, facility permit number and type, permittee name, permitted acre-feet per year and water source. Locations of USFs are shown on Figure 8.3-9.    There are no Groundwater Savings Facilities (GSF) in the AMA. A description of aquifer data sources and methods as well as well data sources and methods, including water-level changes and well yields are found in Volume 1, Appendix A. 

Major Aquifers

  • Refer to Table 8.3-6 and Figure 8.3-6
  • The major aquifers in this AMA are basin fill and igneous and metamorphic rock.
  • Groundwater flow is generally from the mountains on the AMA boundary toward the center of the AMA. Groundwater flows north from the Little Chino Sub-basin and south and north from the Upper Agua Fria Sub-basin.

Well Yields

  • Refer to Table 8.3-6 and Figure 8.3-8
  • One source of well yield information, based on 137 reported wells, indicates that the median well yield is 644 gpm.

Natural Recharge

  • Refer to Table 8.3-6
  • Natural recharge in the Prescott AMA is approximately 7,000 acre-feet per year.
  • Primary source of natural recharge is from infiltration of runoff into stream channels and mountain front recharge.

Water Level

  • Refer to Figure 8.3-6. Water levels are shown for wells measured in 2004.
  • The Department annually measures 93 index wells in this AMA.  Hydrographs for six of these wells are shown on Figure 8.3-7
  • The deepest water level shown is 428 feet west of the junction of Highway 89 and Highway 89A in the center of the AMA and the shallowest is 16 feet in the northern portion of the AMA west of Highway 89.

Recharge Sites

  • Refer to Table 8.3-7 and Figure 8.3-9.
  • There are three active USFs with a total permitted storage capacity of almost 13,000 acre-feet per year.

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Table 8.3-6 Groundwater Data in the Prescott AMA

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Figure 8.3-6 Prescott AMA Groundwater Conditions

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Figure 8.3-7 Prescott AMA Hydrographs Showing Depth to Water in Selected Wells

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Figure 8.3-8 Prescott AMA Well Yields

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Table 8.3-7 Recharge Sites in the Prescott AMA

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Figure 8.3-9 Prescott AMA Recharge Sites


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