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Baseline Hydrologic Monitoring Plan — Hansen Project 23
<br />3. SURFACE WATER MONITORING
<br />3.1 Monitoring Network
<br />The surface water monitoring network consists of 12 surface water stations, as shown in Table 6 and Figure
<br />10. Stations have been selected upstream and downstream of the Project site, at the property boundaries to
<br />the east and south, as well as above and below the confluence of Squaw Creek and Cottonwood Creek and
<br />above the confluence of Middle Tallahassee Creek and North Tallahassee Creek.
<br />The former surface water stations monitored by Cyprus in 1979 — 1981 for the Hansen deposit are also
<br />shown in Figure 10. Eight of the twelve monitoring stations are located at or near Cyprus historical surface
<br />water monitoring stations. The names of the current monitoring stations correspond with the old stations;
<br />for example, station SW07 -CO is located on Cottonwood Creek near Cyprus's station 4407.
<br />Stations SW19 -HG and SW22 -HG were established as downstream surface water monitoring stations for
<br />the original Taylor Ranch Project. The stations were monitored from 2008 to 2010 and were removed
<br />from the monitoring program (Table 7) when the expansion of the Project to include Hansen deposit
<br />changed the location of downstream stations.
<br />Table 6. Surface Water Monitoring Locations
<br />4153A.140129 Whetstone Associates
<br />State Plane Coordinates
<br />Station ID
<br />Former ID
<br />Description
<br />Easting Northing
<br />Frequency
<br />ft ft
<br />SW04 -SA
<br />4404
<br />Salt Creek, below Taylor Soda Springs
<br />1,987,835
<br />279,670
<br />Annual
<br />SW07 -CO
<br />Near 4407
<br />Cottonwood Creek, upstream of Project, above
<br />1,988,950
<br />284,960
<br />Annual
<br />CR2 Road Crossing
<br />SW08 -CO
<br />Near 4408
<br />Cottonwood Creek, downstream of confluence
<br />1,993,675
<br />281,720
<br />Annual
<br />with Squaw Creek
<br />SW10 -FC
<br />4410
<br />Fear Creek, Middle Tallahassee Creek
<br />1,978,040
<br />258,795
<br />Quarterly
<br />SW11 -MT
<br />4411
<br />Upper Middle Tallahassee Creek
<br />1,977,710
<br />262,695
<br />Quarterly
<br />SW12 -HG
<br />4412
<br />Hall Gulch, Middle Tallahassee Creek
<br />1,979,770
<br />265,135
<br />Quarterly
<br />SW13 -NT
<br />4413
<br />North Tallahasee Creek
<br />1,999,005
<br />256,725
<br />Quarterly
<br />SW14 -MT
<br />4414
<br />Middle Tallahassee Creek, above confluence
<br />1,998,580
<br />255,940
<br />Quarterly
<br />w/North Tallahassee Ck (Bar -J area)
<br />North Tallahassee Creek, upstream Project
<br />SW17 -NT
<br />- --
<br />area, first perennial flow documented on USGS
<br />1,969,370
<br />274,120
<br />Annual
<br />Quad ma
<br />Near 1979
<br />North Tallahassee Creek, downstream of
<br />SW18 -NT
<br />NT sample
<br />Project area, above CR21 Crossing (Bar -J
<br />1,988,673
<br />265,380
<br />Annual
<br />subdivision area)
<br />SW19 -HG
<br />- --
<br />Hall Gulch at property boundary
<br />1,975,855
<br />267,950
<br />Not
<br />Sampled
<br />Hall Gulch (0.5 miles above confluence w/
<br />Not
<br />SW20 -HG
<br />- --
<br />Middle Tallahassee Ck), 1.9 miles below
<br />1,983,965
<br />262,100
<br />Sampled
<br />property boundary
<br />SW21 -SQ
<br />- --
<br />Squaw Creek, above County Road 9A Crossing
<br />1,983,350
<br />281,170
<br />Annual
<br />SW22 -MT
<br />1400 ft d/s
<br />Middle Tallahassee Creek below property
<br />1,992,040
<br />256,930
<br />Quarterly
<br />4409
<br />boundary
<br />4153A.140129 Whetstone Associates
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