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Surface Water Conditions in the Morenci Basin

Streamflow data, including average seasonal flow, average annual flow and other information is shown in Table 3.9-2.  Flood ALERT equipment in the basin is shown on Table 3.9-3.  Reservoir and stockpond data, including maximum storage or maximum surface area of large reservoirs and type of use of the stored water, are shown in Table 3.9-4.   The location of streamflow gages identified by USGS number, flood ALERT equipment, USGS runoff contours and large reservoirs are shown on Figure 3.9-5.  Descriptions of stream, reservoir and stockpond data sources and methods are found in Volume 1, Appendix A. Additional information on surface water in this basin can be found in Section 3.9.5 - Perennial/Intermittent Streams and Springs and Section 3.0.2 - Surface Water Hydrology. Where available, the header for each section provides a link to the data web site.  

Streamflow Data

  • Refer to Table 3.9-2.
  • Data from six stations on four watercourses are shown on the table and on Figure 3.9-5. Three stations have been discontinued; those remaining are real-time stations.
  • The average seasonal flow at most stations is highest in the Winter (January-March) and lowest in the Spring (April-June) or Summer (July-September).

  • Maximum annual flow in this basin was 678,755 acre-feet in 1915 on the San Francisco River, see Figure 3.9-4, and minimum annual flow was 724 acre-feet in 1964 on Willow Creek. 

Flood ALERT Equipment

  • Refer to Table 3.9-3.
  • There are seven stations in the basin as of October 2005. 

Reservoirs and Stockponds

  • Refer to Table 3.9-4
  • There are four large and 16 small reservoirs in this basin.

  • The largest reservoir, the Silver Basin, has a maximum storage capacity of 5,200 acre-feet.

  • The reservoirs are used for irrigation, recreation and other purposes.

  • There are 673 registered stockponds in this basin.

Runoff Contour

  • Refer to Figure 3.9-5.
  • Average annual runoff increases from 0.5 inches, or 26.65 acre-feet per square mile, in the vicinity of Clifton and Morenci to two inches, or 106.6 acre-feet per square mile toward the Mogollon Rim. 

Click to view Table 3.9-2

Click to view Table 3.9-2 Streamflow Data for

the Morenci Basin

Click to view Figure 3.9-4

Click to view Figure 3.9-4 Annual Flows (in acre-feet) at San Francisco River at Clifton (Station #9444500) Water Years

1914-2007

Click to view Table 3.9-3

Click to view Table 3.9-3 Flood ALERT Equipment

in the Morenci Basin

Click to view Table 3.9-4

Click to view Table 3.9-4 Reservoirs and Stockponds

in the Morenci Basin

Click to view Figure 3.9-5

Click to view Figure 3.9-5 Morenci Basin

Surface Water Conditions

 

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