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Figure 1. Southward wew of the Raven Gulch stream channal ai LocaUOn 1. Colluvium (right) merges <br />downward into the stream alluvium that consists of clay- to boulder-size material. <br />4.1.2 Location 2 <br />l.txation 2 is also A' (the end of foot traverse :1-A' 1. It is located ut a recently placed tvut~den <br />survey stake, near the interscctiun ot- Raven Gulch and the first suuth+vest-trending fork of Raven <br />Gulch. Vu GPS point could be taken, tx~cause the signals were text weak to attempt a Icxauon. <br />The overburden depth to the B-Seam is about 57S feet. <br />Raven Gulch locally widens from about 2S0 feet near Lncation I to about 1,000 1'cet between <br />rations I and 2. The alluvium and rolluvium, which is mixed together in places and srparated <br />in others, is estimated to range Irom about SO feet to at least ~iU fact thick. As many as three <br />separate alluvia! terraces were also observed bet+vecn l.txations I and 2. <br />The alluvium and atlluvium appear similar to that uhsen•ed in Ihep Creek, execpt that thcrc arc <br />some+ahat less clays and silts from the Wasatch Formation here than farther southward. <br />Irregular, branching, and converging desiccation marks, !-', to'+ inches wtde, were observed in <br />clay and silt areas on the u~ul between rations I and 2. Boulders. as much as 25 feet m long <br />831-032.710 Wright Water Engineers. Inc. Page 9 <br />Novembor 2005 <br />2005 Subsidence and Geologic Field Obsarvauons <br />Boz Canyon, West Flatiron, Apache Rocks, <br />and South of Drvide Mining Areas <br />