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Groundwater Conditions in the Donnelly Wash Basin

Major aquifers, well yields, estimated natural recharge, estimated water in storage, number of index wells and date of last water-level sweep are shown in Table 3.4-3. Figure 3.4-6 shows aquifer flow direction and water-level change between 1990-1991 and 2003-2004. Figure 3.4-7 contains a hydrograph for a selected well shown on Figure 3.4-6. Figure 3.4-8 shows well yields in three yield categories. 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.  For more information on groundwater in the basin see Donnelly Wash Basin Hydrology.

Major Aquifers

  • Refer to Table 3.4-3 and Figure 3.4-6.
  • The major aquifer in the basin is a narrow strip of basin fill.
  • Flow direction is from the southeast to the northwest.

Well Yields

  • Refer to Table 3.4-3 and Figure 3.4-8.
  • As shown on Figure 3.4-8 well yields in this basin range from less than 100 gallons per minute (gpm) to 1,000 gpm.
  • One source of well yield information, based on four reported wells, indicates that the median well yield in this basin is 62.5 gpm.

Natural Recharge

  • Refer to Table 3.4-3 .
  • The natural recharge estimate for this basin is 3,000 acre-feet per year (AFA). 

Water in Storage

  • Refer to Table 3.4-3 .
  • There are three storage estimates for this basin, ranging from 140,000 acre-feet to 2.0 million acre-feet to a depth of 1,200 feet. 

Water Level

  • Refer to Figure 3.4-6. Water level is shown for a well measured in 2003-2004.
  • The only 2003-2004 recorded water level in the basin is 35 feet northwest of Beehive Tank. A hydrograph corresponding to this well is shown in Figure 3.4-7.


Click to view Table 3.4-2

Click for Table 3.4-3 Groundwater Data for the

Donnelly Wash Basin

Click to view Figure 3.4-6

Click for Figure 3.4-6 Donnelly Wash Basin

Groundwater Conditions

Click to view 3.4-7

Click for Figure 3.4-7 Donnelly Wash Basin

Hydrograph Showing Depth to Water in Selected Wells

Click to view Figure 3.4-7

Click for Figure 3.4-8 Donnelly Wash Basin

Well Yields



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