PERMFILE49838

• Permit No: C1991078
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: 2.06 Special Categories of Mining
• Media Type: D
• Archive: No

2.os.s
• Changes in the quantity of water supplied to the alluvial
valley floors depends on the consumptive use of run-off water
within the mine permit area and whether the alluvial valley
floors use the surface run-off from the mine permit area for a
source of irrigation water. No consumptive use of the run-off
water within the mine permit area is anticipated. Area 1 is
irrigated by water from the San Miguel River. This irrigation
water is derived from the B C D Ditch, map code 4 shown on the
Water Rights Location Map, Drawing No. 111, which is upstream of
the confluence of Naturita Creek and the San Miguel River. This
point of diversion is well upstream of the area that could be
impacted by the mining operation. The mining operation will
therefore not effect the quantity of surface water supplied to
Area 1.
Area 2 is irrigated with water from a headgate located
upstream of the confluence of Section 33 Creek and Naturita
Creek. This irrigation water is derived from the Maverick Draw
Ditch, map code 7, shown on the Water Rights Location Map, which
is upstream of the area that could be impacted by the mining
operation. The mining operation therefore cannot effect the
quantity of surface water supplied to Area 2.
Bramiers Draw bisects Area 1 in a westerly direction.
Bramiers Draw also runs near the potential alluvial valley floor
ad,iacent to Area 1. Two of the sediment ponds, D & E, are de-
signed to discharge into Bramiers Draw. Flow from the sediment
ponds must flow over one mile down Bramiers Draw before it reach-
es Area 1. The flow then passes through the field and enters the
San Miguel River. The run-off from Bramiers Draw is not used to
irrigate Area 1 nor does it contribute flow to the irrigation
system for Area 1. Therefore, surface run-off from the mining
operation, which could flow down Bramiers Draw, will not effect
the quality of surface water supplied to Area 1.
Four alluvial wells will be installed to determine if the
quality of water in the alluvium is impacted by the mining opera-
tion. The wells will be located near Area 1. Two wells will be
installed along Bramiers Draw and two will be installed along
Naturita Creek. The wells in each drainage, will be located up
gradient and down gradient of the irrigation ditch located south
of Area 1. The quality of water in the irrigation ditch will
also be monitored to supplement the alluvial well monitoring
data. This surface water monitoring point will be located where
the irrigation ditch crosses over Naturita Creek. There is no
return irrigation flow between this surface water monitoring
point and the alluvial wells along Bramiers Draw. The general
location of the alluvial wells, AW-4, AW-5, AW-6 and AW-7 and the
additional surface water monitoring point R-1, is show on Drawing
Nos. 110 and 125.
• 2.06-3 August 1991