Laserfiche WebLink
June 11, 1980. The investigation resulted in no identification of <br />• alluvial valley floors in the area to be mined; however, the flood- <br />plains of Goodsprinq Creek, Wilson Creek, lower Taylor Creek and <br />lower Elkhorn Creek may conform to the geomorphic criteria of AVF <br />surface landforms because they are underlain by unconsolidated <br />material of quaternary Age. None of these floodplains are located <br />in the area to be mined as shown on the Mine Plan Map (Map 23). <br />The Gossard Loadout is located in an area between Wilson Creek and <br />Taylor Creek near the junction of these two drainages; however, no <br />major subsurface disturbance has occurred in this area which might <br />adversely affect the possible subsurface hydrologic system with <br />regards to potential alluvial valley floors. The actual area to be <br />mined is located well above the flood plain of Goodsprinq Creek <br />both topographically and geologically. As discussed in Section <br />2.04.7, the existence of groundwater in the mining area is limited <br />to perched systems which primarily discharge small amounts of water <br />in the canyon walls near the mine on a seasonal basis. Very little <br />water is found in the active mine; and, based on existing <br />geological and hydrological evidence, the area to be mined provides <br />no or only minor amounts of recharge to Goodsprinq Creek and Taylor <br />• Creek. Therefore, the flood plains of Goodsprinq Creek, Wilson <br />Creek, and lower Taylor Creek should not be adversely affected by <br />mining operations. <br />Geomorphic Characteristics <br />The investigation was initiated by mapping unconsolidated deposits <br />in the general area, using published and unpublished geologic maps <br />and ground reconnaissance. These deposits and their associated <br />stream channels are shown on the Regional Hydrology Map (Map 10). <br />Also shown are delineations of Goodsprinq Creek, Wilson Creek, and <br />Taylor Creek watersheds and the general topography of the flood- <br />plain areas. From field reconnaissance, it was determined that <br />many of the mapped floodplains in the general area are extremely <br />narrow or contain too much topographic relief in the form of slopes <br />to be considered capable of being irrigated. <br /> <br />2.06-11 <br />