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Page 118 <br /> 6.4.4 EXHIBIT D - Extraction Plan <br /> this application are based upon future events for which minor or temporary <br /> departures at any point in time may be evident. To the extent any significant <br /> departure in the field occurs in a time and manner not otherwise anticipated in <br /> these exhibits, the operator may cure by self-inspection, by observation from <br /> OMLR inspection in a timely manner, or by operator-initiated Revision to the <br /> Permit or otherwise via clarification in attending required OMLR Annual <br /> Reports. <br /> Extraction will not occur closer than 125± feet' from the face of a residential <br /> structure; unless there is a written accommodation with the owner of the <br /> residential structure that allows extraction to occur within a closer stated limit. <br /> Extraction will occur no closer than 25± feet from well heads and related above <br /> ground facilities. Extraction around well heads will be concurrently backfilled <br /> to maintain a 100± foot buffer from the balance of extracted lands. At all <br /> times, safety will take precedent and over-ride all other conditions in time with <br /> a matter of safety or emergency respective to any and all aspects of the <br /> approved permit. <br /> To minimize the potential of river capture, planned setbacks from the two rivers <br /> was evaluated by Flow Technologies (refer to report at the back of Exhibit G: <br /> Water Information- titled: `Two Rivers Riverside Berm Failure Analysis and Flood <br /> Control Mitigation Plan' of 22 January 2020). The report finds: <br /> `... that head cutting/erosion will not progress through the full length of <br /> a 100-ft riverside berms. It is important to note that should a flood occur <br /> that results in head cutting/erosion of a riverside berm, Varra <br /> Companies, Inc. will act diligently to restore the damaged areas to pre- <br /> flood conditions. <br /> As mentioned, this analysis is conservative and riverside head <br /> cutting/erosion is based on the 100-yr flood. There is a small probability <br /> that such a flood event could occur during extraction and when the pit is <br /> dewatered. <br /> During extraction, a predominantly vertical advancing pit wall (the extraction <br /> front) is not anticipated due to the use of excavators in the removal of the <br /> material deposits. Excavators provide a great deal of control over the <br /> extraction process. The maximum length of the extraction front will likely <br /> never exceed the length of one side of a quarter section of land, or 1,3 20± f eet, <br /> or less; in any given direction. The advancing front will result in a moving face <br /> with a slope typically equal to or flatter than 1.2 5H:1V, and commonly not <br /> greater than 1.2 5H:1V along the perimeter of the extraction limits to depth. <br /> 'Adequacy Item 22 <br /> VARRA COMPANIES, INC. TWO RIVERS SAND GRAVEL AND RESERVOIR PROJECT MARCH 2O22 <br /> A REGULAR IMPACT[1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MIING&SAFETY <br /> OFFICE OF MINED LAND RECLAMATION <br />