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Groundwater Conditions in the Paria Basin

Major aquifers, well yields, estimated water in storage, number of index wells and date of last water-level sweep are shown in Table 6.4-4.  Figure 6.4-6 shows water-level change between 1990-1991 and 2003-2004.  Figure 6.4-7 contains the hydrograph for the selected well shown on Figure 6.4-6.  Figure 6.4-8 shows well yields in two 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. 

Major Aquifers

  • The major aquifer in the basin is sedimentary rock (N Aquifer).

  • Almost all of the basin geology consists of consolidated crystalline and sedimentary rock.

  • Data on natural recharge and groundwater flow direction is not available for this basin. 

Well Yields

  • As shown on Figure 6.4-8, well yields in this basin range from less than 100 gallons per minute (gpm) to 1,000 gpm.  All well yield data is from the northeastern portion of the basin near Wahweap.

  • One source of well yield information, based on three reported wells, indicates that the median well yield in this basin is 520 gpm in the vicinity of Wahweap.

Water in Storage

  • Refer to Table 6.4-4.
  • The storage estimate for this basin is 1.5 million acre-feet of water to a depth of 1,200 feet.

Water Level

  • Refer to Figure 6.4-6. Water levels are shown for a well measured in 2003-2004.
  • The Department annually measures one index well in this basin; this well has a depth to water of 483 feet. A hydrograph for this well is shown on Figure 6.4-7.

Click to view Table 6.4-4

Click for Table 6.4-4 Groundwater Data for the Paria Basin

Click to view Figure 6.4-6

Click for Figure 6.4-6 Paria Basin Groundwater Conditions

Click to view Figure 6.4-7

Click for Figure 6.4-7 Paria Basin Hydrographs Showing Depth to Water in Selected Wells

Click to view Figure 6.4-8

Click for Figure 6.4-8 Paria Basin Well Yields



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