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<br />The site was also visited by. an experienced surf ace. and <br />ground water hydrologist so that the basic data on the sur- <br />face and ground water conditions could be collected. In this <br />report, the information necessary for MLR to determine the <br />presence and extent of AVFs on the Colorado Westmoreland Inc. <br />property in the North Fork valley and Stevens Gulch valley <br />are presented. <br />2.0 ALLUVIAL VALLEY FLOOR DETERMINATION <br />2.1 COLORADO MINED LAND RECLAMATION REQUIREMENTS <br />FOP, THE DETERMINATIOi1 OF AVFs <br /> According to paragraph 2.06.8(3) of the Regulations of <br /> the Colorado Mined Land Reclamation Board for Coal Mining (1981), <br /> the coal mining operator should either affirmatively demonstrate, <br />• based on available data, the presence of AVF or submit to <br /> MLR the results of afield investigation of the proposed per- <br /> mit area and adjacent area. The field investigations should <br /> include sufficiently detailed geologic, hydrologic, land use, <br /> soils and vegetation studies. <br /> Based on available data, MLR will make a determination <br /> of the presence or absence of Alluvial Valley Floors, the <br /> extent of any AVF within the study area and whether any stream <br /> in the study area may be excluded from further consideration <br /> as lying within the AVF. <br /> The criteria for determining the existence of an Alluvial <br /> Valley Floor by the Division of the MLR are as follows <br /> - 3 - <br /> <br /> ~EaHwaoca+wmxc.n~c. <br />