PERMFILE116168

• Permit No: C1981019
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: Report Dated October 1979
• Section_Exhibit Name: Exhibit 07 Item 1 Ground Water Quality
• Media Type: D
• Archive: No

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_ _~_
~ of flora of the ground water near the mine site is northwest,
~ • potentially through the mined area to Streeter Canyon and then
east toward the confluence of Streeter Canyon and Good Spring
+ Creek.
Recharge to the ground water system in the area is limited.
The annual precipitation is less than 23 inches. The overburden
l has a low transmissivity. Aquifer tests made using wells com-
pleted into the overburden revealed transmissivities of about
40 gallons per day/foot (gpd/ft). Natural discharge from the
ground water system is generally to the surface streams through
( springs and seeps on the canyon walls. An estimate of base
l flow in Good Spring Creek, Taylor Creek and S7ilson Creek, made
from the U. S. Geological Survey gauges on these creeks, indi-
[ rated betcreen 0.2 and 0.35 inches of water over the watershed
annually. If the ground water system is in equilibrium, the
f
l.; recharge to the system should equal the discharge from the sys-
tem. This means that recharge to the ground water is on the
~• order of 1.0 to 1.5 per cent of the annual precipitation. This
is a low value, but the total runoff measured at the gauges is
( only 2.6~ of t:~e annual precipitation.
She discontinuity of the beds, the minimal recharge (as evidenc-
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ow
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e low annua
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on con-
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arge) an
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tribute to existance of perched ground crater conditions. Obser-
vation of the extremely seasonal natural springs o;:d seeps, the
low volume of water discharged into the pit from the ground
f
L water system, and the drying up within one year of a water well
drilled near sample site 10 to supply water in the machine shop
above the pit, support this assumption.
L
f ~ Leonard Rice Consulting Waler Engineers.lnc.
1.