Surface Water Conditions in the Grand Wash Basin

There are no streamflow data, flood ALERT equipment or large reservoirs in this basin. Total number of stockponds in the basin is shown on Table 6.2-1.  USGS runoff contours are shown on Figure 6.2-4.  Descriptions of stream, reservoir and stockpond data sources and methods are found in Volume 1, Appendix A. 

Reservoirs and Stockponds

• Refer to Table 6.2-1

• The basin borders one large reservoir, Lake Mead, with a maximum capacity of 29,755,000 acre-feet.  The dam that creates Lake Mead, Hoover Dam, is in the Lake Mohave Basin in the Upper Colorado River Planning Area.

• There are 109 registered stockponds in the basin.

Runoff Contour

• Refer to Figure 6.2-4.

• Average annual runoff is highest, one inch per year, or 53.3 acre-feet per square mile, in the northern portion of the basin near Mud Mountain Road and decreases to 0.1 inches, or 5.33 acre-feet per square mile, in most of the southern portion of the basin.

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