Laserfiche WebLink
• ~:.. <br /> <br />• <br />(^ <br />stream. Small scale alterations to the valley walls and score allwlal <br />and collwlal deposits have occurred In association with past and <br />on-going mining operations, both In the permit area and the surranding <br />lands within the SSB. <br />A11wie1 deposits In the valleys of SSB are very similar to those <br />In NSB They are scattered, Irregularly mantle the bedrock on the <br />narrow valley floors, and mixed wtih coliwium fron the valley walls. <br />Ceposlts are smell patches and linear Inter-charnel bar accurulatlons of <br />boulders, cobbles, gravel and sand. Allwiun is derived from bedrock <br />exposures, collwial detritus, and from the pediment caps. The general <br />dimensions of these Irregular allwlal deposits increase toward the <br />lower end of the 558. None of the allwlal deposits Is over 50 feet <br />wide (generally less than 30 feet) and cantinuais over more than a few <br />• hundred feet. These deposits probably do not exceed ZO feet in depth. <br />Soil patches are limited. to Irregular, thin (less than 5 feet) silty <br />sands. The colt and all wium are constantly reworked and shifted by <br />stream action in the valley floors of the SSB. No extensive <br />flat-bottomed valley floor deposits exist in the valleys of the SSB. <br />No contributions to surface flow fran springs or other corv~ectlons <br />to deep grand water exist. No hydraulic connection exists between the <br />strews In the deep valleys and the pediment deposits except where the <br />streams flaw an the depostts (see the Hydrology Map, Sheet 1). It is <br />apparent that no significant emount of water Infiltrates the pediment <br />caps where the streams do cross them. Evidence for this 1 tes in •the <br />Intermittent nature of the streams, the relatively short distances the <br />streams flow on pediment caps, the lack of springs and seeps at the <br />lower exposed edges of the pediment rertnants, and the tack of vegetation <br />on the pediments. Subirrlgation Is therefore not considered to be <br />occurring in the SSB. <br />• Newlin Creek Basin <br />The Newlin Creek Basin above the confluence of the 558 and NSB can <br />be divided Into two (2) parts. The first Is the narrow strip forming <br />