Major and minor springs with discharge rates and date of measurement, and the total number of springs in the basin are shown in Table 3.13-4.  The locations of major springs as well as perennial and intermittent streams are shown on Figure 3.13-6.   Descriptions of data sources and methods for intermittent and perennial reaches and springs are found in Volume 1, Appendix A.  Additional information on surface water in this basin can be found in Section 3.13.4 - Surface Water Conditions and Section 3.0.2 - Surface Water Hydrology.

• There are numerous perennial stream reaches in this basin, primarily in the southern portion of the basin. 

• A number of intermittent stream reaches are located throughout most of the basin.

• The San Pedro River is intermittent through most of this basin with a perennial reach in the southern portion of the basin.

• There are 12 major springs with a measured discharge of 10 gallons per minute (gpm) or greater at any time.  The largest discharge rate is 134 gpm at Garden Canyon No. 1.

• Springs with measured discharge of 1 to 10 gpm are not mapped but coordinates are given in Table 3.13-4.  There are four minor springs identified in this basin.

• Listed discharge rates may not be indicative of current conditions.  All but two of the  measurements were taken prior to 1982. 

• The total number of springs identified by the USGS varies from 79 to 91, depending on the database reference.

Click to view Table 3.13-4 Springs in

the Upper San Pedro Basin

Click to view Figure 3.13-6 Upper San Pedro BasinPerennial/Intermittent Streams and Major (>10gpm) Springs

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