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Chris Gilbreath <br />Page 9 <br />should include the impacts of the faults mentioned in item 10 of this letter on the integrity of the <br />confining layer. <br /> <br />Please provide references in the text to supporting data. <br />b. <br />Please propose a monitoring point(s) that will allow the prediction of “no impact” to the Trout <br />c. <br />Creek Sandstone to be verified. <br /> <br /> <br />ITEM 81. CCC proposes to discharge a very significant volume of water from dewatering wells (200- <br />300 gpm during years 1-3; 100-200 gpm during years 4-8; <100 gpm after year 8); potentially in the <br />region of 3,000 acre-ft over 8 years. <br />Please clarify the legal right of CCC to this groundwater. <br />a. <br />Please describe how the water will be used or discharged. Where will it be pumped to? What <br />b. <br />are the anticipated impacts to the receiving drainage? <br /> <br />Please propose monitoring points that will allow the drawdown cone adjacent to the pit to be <br />c. <br />characterized during the dewatering and recovery phases of the operation, and predictions <br />made in the PHC to be verified. <br /> <br />This is related to Item 1 in the initial adequacy review letter. <br />d. <br /> <br />ITEM 82. Section 2.06.8 of the PAP discusses operations on areas, or adjacent to areas, including <br />alluvial valley floors. The text describes a field investigation and technical evaluation of all drainages <br />containing streams within and adjacent to the permit boundary, including the Collom Gulch, little Collom <br />Gulch and West Fork of Jubb Creek drainages. The conclusion is that alluvial materials are present in <br />Please ensure that the <br />these drainages, but that they do not meet the definition of Alluvial Valley Floor. <br />discussion in this section is consistent with the areas of Quaternary Alluvium and Irrigated Land <br />shown on Maps 7A and 10B. <br /> <br /> <br />ITEM 83. Map 10B shows Hydrologic Features and Monitoring Locations. The legend shows a symbol <br />for “Area of Quaternary Alluvium”, and such areas are shown as existing in the Wilson Creek and Good <br />Please update Map <br />Spring Creek drainages. None are shown in the west of the proposed permit area. <br />10B to show all areas of Quaternary Alluvium within the proposed permit area and comment on <br />any differences in spatial extent between this layer and the layer shown on Map 7A as Qv (valley fill <br />deposits). <br /> <br />ITEM 84. The text in Volume 15, Rule 4, Page 10, states that the alluvial groundwater monitoring well <br />MC-04-01 “is additionally designated as a “Point of Compliance” well for alluvial groundwater <br />monitoring purposes.” This appears to be contradicted by later statements, and in any case MC-04-01 is <br />not appropriately located to be a point of compliance since there is disturbance proposed in the Collom <br />Please update the text describing MC-04-01. <br />Gulch drainage downgradient of MC-04-01. <br /> <br /> <br />ITEM 85. CCC has shown that there is the potential for activity permitted under PR-4 to negatively <br />impact the quality of alluvial groundwater in the Collom Gulch, Little Collom Gulch and Jubb Creek <br />drainages. Rule 4.05.13 (1) (b) requires that points of compliance be established, in addition to other <br /> <br /> <br />