GENERAL33770 - Laserfiche WebLink

Home Browse Search

.1 i • • ~~~ frequently dry. Data collected by the applicant from the Salt Creek alluvial aquifer thus far indicate a carbonate-sulfate type water, similar to the characteristics of the surface water in the system as would be expected. Similar to the case of surface water quality, no significantly adverse affects are anticipated for this operation. Salt Creek Mining Company intends to monitor this aquifer upstream and downstream of the mine to identify any effects from mining. The Division therefore reguires the following stipulation to verify it's conclusions: STIPULATION H4 THE PERMITTEE WILL CONTINUE MONITORING WELLS GW-1 AND GW-4 IN SALT CREEK ALLWIUM QUARTERLY. AT THESE TIMES THE WATER LEVEL IN THE WELZS WILL BE MEASURED AND SAMPLES WILL BE TAXEN FOR ANALYSIS OF pH, TEMPERATURE AND SPECIFIC CONDUCTANCE. THE RESULTS OF THIS MONITORING WILL BE SUBMITTED TO THE DIVISION IMMEDIATELY AFTER DATA COLLECTION AND ANALYSIS. VII. Alluvial Valley Floors-Rule 2.06.8 and 4.24 Sufficient information was provided by the applicant to determine that East Salt Creek is an alluvial valley floor. Unconsolidated alluvial deposits have been identified which are extensive enough to qualify as alluvial valley floors. The existence of agricultural activities in the vicinity of the operation is evidence of the potential for irrigation. Alluvial Valley Floor Findings With Regard to Farmino- Physical disturbances created by the operation which will directly impact the alluvial valley floor are road construction and a proposed sedimentation pond. The road construction attributable to the operation consists of widening of an existing ranch road leading to the portal area. The sedimen- tation pond will be constructed at the mouth of McClane Canyon within the area mapped as unconsolidated alluvial deposits. As stated on page 4-4 (Volume 1) of the application, the total disturbance of the AVF related to the road expansion and construction of the sediment pond is approximately one acre. The total area of alluvial valley floor within a one-half mile radius of the confluence of McClane and East Salt Creek (as mapped by the applicant) is approximately 195 acres. Approximately one-sixth of one percent of the AVF contained within this area will be affected by the surface disturbance related to the operation. No farming activities will be physically affected by these surface impacts. She only land use type which will be directly affected is undeveloped range- - land. The conclusion is, therefore, that the surface disturbance related to the operation is limited in extent and will not directly affect any farming activities on the alluvial valley floor. An area of irrigated cropland is located on the East Salt Creek alluvial valley floor approximately b mile downstream of McClane Canyon. Irrigation occurs through a series of diversion ditches carrying the surface flow to various parts of the field. The essential hydrologic functions for this