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a~ <br /> <br />• <br /> <br />TABLE OF CONTENTS <br />5.0 SPECIAL CATEGORIES OF MINING <br />. 5-1 <br />5.1 ALLWIAL VALLEY FLOOR DETERMINATION 5-1 <br />5.1.1 Introduction 5-1 <br />5.1.2 Descri ption of Unconsolidated Sediments 5-1 <br />5.1.3 Colora do River 5-2 <br />5.1.3.1 Unconsolidated Sediments 5-2 <br />5.1.3.2 Monitoring 5-3 <br />5.1.3.3 Flood-Irrigated Land 5-3 <br />5.1.3.4 Land Use 5-4 <br />5.1.3.5 Water Yield 5-4 <br />5.1.3.6 Soils 5-4 <br />5.1.3.7 Subirrigation 5-9 <br />5.1.4 Alkali Creek 5-5 <br />5.1.4.1 Unconsolidated Sediments 5-5 <br />5.1.4.2 Monitoring 5-5 <br />5.1.4.3 Flood-irrigated Land 5-6 <br />5.1.4.4 Land Use 5-6 <br />5.1.4.5 Water Yield 5-6 <br />5,1,4,6 Soils 5-7 <br />5.1.4.7 Subirrigation 5-7 <br />5.1.5 South Canyon Creek 5-7 <br />S.I.5.1 Unconsolidated Sediments 5-7 <br />5.1.5.2 Monitoring 5-7 <br />5.1.5.3 Flood Irrigation 5-8 <br />5.1.5.4 Land Use 5-8 <br />5.1.5.5 water Yield 5-8 <br />5.1.5.6 Soils 5-8 <br />5.1.5.7 Subirrigation 5-8 <br />5.1.6 Summar y 5-8 <br />5.2 DETAILED AVF DESCRIPTION 5-9 <br />5.2.1 Introduction 5-9 <br />5.2.2 Detail ed Description of the Colorado River <br />AVF 5-10 <br />5.2.2.1 Colluvium 5-10 <br />5.2.2.2 Transition Zone 5-11 <br />5.2.2.3 Terrace 5-11 <br />5.2.2.4 Bedrock 5-11 <br />5.2.2.5 Groundwater 5-12 <br />5.2.2.6 Areal Extent 5-13 <br />5.2.2.7 Irrigation 5-13 <br />5.2.2.8 Agriculture 5-14 <br />5.3 HYDROLOGIC FUNCTIONS OF THE AVF 5-16 <br />5.3.1 System Description 5-16 <br />5.3,2 Affects of the Surface Facilities on the <br />AVF 5-17 <br />5.3.3 Restoration of the Hydrologic Functions 5-19 <br />NCEC - Coal Ridge #1 i ABC/1145/900301 <br />