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RULE 4 PERFORMANCE STANDARDS <br /> � B*Avoi k .x::.ate'+, d4,44.4> ,,X,,A sy x„ x}ya-^°Via:_rt ,aa. k^,r,i0Sea..s. :: .: <br /> date the pre-mining ranch road and upgrades have not created any adverse impacts to the West <br /> Fork of Good Springs Creek, and it is not anticipated that this road will have any long term <br /> impacts either to the West Fork of Good Springs Creek. <br /> Colowyo also has two surface water monitoring and two groundwater monitoring structures <br /> (flumes and wells) installed within the stream buffer zone to the West Fork of Goodsprings <br /> Creek. This includes LWFGSC, UWFGSC,A-7 and A-8 as presented on Map 10C. All four <br /> monitoring structures have not and will not create any adverse impacts to the West Fork of <br /> Goodsprings Creek. <br /> Taylor Creek <br /> Colowyo constructed Haul Road A and B within the stream buffer zone which crosses Taylor <br /> Creek. During construction (late 1970's to early 1980's)and to date, the haul roads have not <br /> created any adverse impacts to Taylor Creek. These long term structures are also not anticipated <br /> to have any long term impacts to Taylor Creek. <br /> In 2018, Haul Road A will be widened to facilitate equipment movement from the existing <br /> facilities and South Taylor Pit to the Collom area. Haul Road A will have mechanically <br /> stabilized earth(MSE) walls constructed in locations very near to Taylor Creek to limit <br /> disturbance and protect Taylor Creek within the stream buffer zone area that already contains the <br /> footprint of Haul Road A. Best management practices (BMPs) including silt fence, s-fence, <br /> wattles, or other items at the discretion of the field engineer will be installed and maintained <br /> during the widening of Haul Road A to protect Taylor Creek. Once Haul Road A outslope is <br /> stabilized the BMP's will be removed. Utilization of BMP's during construction and until the <br /> outslopes of the road are stabilize will minimize any potential impacts to Taylor Creek. It is <br /> anticipated that the Haul Road A footprint will not have any short or long-term impacts to Taylor <br /> Creek. <br /> During the widening of Haul Road A,two light use roads will be constructed at the toe of the <br /> Haul Road A to provide access to the Taylor Pump Holding Pond and a water rights diversion <br /> structure on Taylor Creek. Both structures will have proper BMPs installed and maintained <br /> until construction and stabilization of the light use roads is complete. It is not expected that the <br /> light use road will have any short or long term impacts to Taylor Creek. <br /> Two sediment ponds were constructed within the stream buffer zone on Taylor Creek. The West <br /> Pit Pond embankment lies within 100' of Taylor Creek,and the West Taylor Pond was constructed <br /> at the base of the West Taylor Fill and makes up part of Taylor Creek. During construction and to <br /> date these structures have not created any adverse impacts to Taylor Creek,and both structures are <br /> also not anticipated to have any long term impacts to Taylor Creek. <br /> Much of the upper reaches of Taylor Creek above the West Taylor Pond will be directly impacted <br /> by the South Taylor Pit,and the permeant West Taylor Fill(see Map 23A). The West Taylor Pond <br /> will protect the lower reaches of Taylor Creek that will not be disturbed during mining and <br /> reclamation. It is expected that during mining the South Taylor Pit will intercept and hold surface <br /> water runoff thus providing less discharge through the West Taylor Pond. Once mining is <br /> Rule 4 Performance Standards 4-19 Revision Date: 12/20/19 <br /> Revision No.: TR-135 <br />