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1 <br /> <br /> 13. Williams No. 2 Ditch: 25.8 acres of pasture and <br />' hay. <br /> 14. Pratt Ditch: 19 acres of pasture and hay. <br />' AVF Determination <br /> This part of Section V provides an AVF determination <br />' <br /> for the Ward Creek and Williams Creek valleys based on (1) <br />' the information previously presented in this section with <br /> respect to geomorphic and water availability characteristics <br />' and agricultural practices, and (2) the AVF identification <br /> criteria provided in the rules and regulations of the <br />1 l <br />i <br />i <br /> on Board and the OSM AVF <br />orado M <br />ned Land Reclamat <br />Co <br />' Identification and Study Guidelines. <br /> Presence of Unconsolidated streamlaid Deposits Holding <br />' Streams. The Colorado Regulations and the OSM AVF <br /> Guidelines specify that valleys containing unconsolidated <br />t it <br />ith <br />t <br />th <br />th <br />(3) f <br />t <br />t <br />l <br />id d <br />t <br /> s w <br />reams grea <br />er <br />an <br />ree <br />ee <br />s <br />ream <br />a <br />epos <br />s <br />' wide and 0.5 feet deep and with valleys greater than 50 feet <br /> wide (and isolated valley areas exceeding 10 acres in size) <br />' should be included for further evaluation as potential AVFs. <br /> As described in this report, portions of the ward Creek and <br />' Williams Creek valleys (desginated as Qaf, Qtl, Qt2, Qt3, <br /> and Qt4 on Map 7) meet these criteria for the following <br /> reasons: <br />' 1. Although the geomorphic history of these valleys is <br />quite complex (with both terrace and glacial mudflow <br />' landforms), there are unconsolidated streamlaid deposits <br /> <br />91 <br /> <br />