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WILLIAMS FORK MINING COMPANY <br /> SAND AND GRAVEL SITE <br /> Table D-1. Williams Fork Mining Company sand and gravel operation mining area description <br /> Sequential <br /> Mining Overburden Sand &Gravel Size of Overburden *Approximate Dates <br /> Area Depth (ft) Thickness (ft) Area (acres) Type of Development <br /> Area 1 1-8 8-12 3.5 (1) 1985-1986 <br /> Area 2 3-10 8-12 10.0 (1) 1987-1991 <br /> Area 3 4-10 8-12 10.4 (1) 1991-1996 <br /> Area 4 4-10 8-12 7.1 (1) 1997-2001 <br /> Area 5 4-12 8-12 7.8 (1) 2001-2006 <br /> Area 6 4-12 8-12 8.6 (1) 2006-2014 <br /> Area 7 8-12 5-12 4.2 (1) 2020-2021 <br /> Area 8 3-11 8-12 5.1 (1) 2020-2021 <br /> (1) Alluvial,flood plain deposits consisting of brown to dark brown silt and clay. <br /> *Actual dates may vary depending on customer gravel requirements. <br /> FVU/sh 4/19 <br /> [sgpermit] <br /> D <br /> v <br /> o <br /> < 0 <br /> cn :3 <br /> a •• <br /> 7% <br /> ] <br /> C <br />