PERMFILE58842

• Permit No: C1981020A
• IBM Index Class Name: Permit File
• Doc Date: 5/23/2007
• Section_Exhibit Name: Table of Contents
• Media Type: D
• Archive: Yes

TOC - 3
4.0 DESCRIPTION OF THE ENVIRONMENT ........................................... .... 4-1
• 4.1 LAND USE .........................................................................................
4.1.1 Regional Land Use .................................................................... .... 4-1
.... 4-1
4.1.2 Site Land Use ............................................................................ .... 4-1
4.1.2.1 Historic Land Use ....................................................... .... 4-1
4.1.2.2 Present Land Use ....................................................... .... 4-2
4.1.2.3 Future Land Use ......................................................... .... 4-3
4.1.3 Prime Farmland ........................................................................ .... 4-3A
4.1.4 Alluvial Valley Floor ................................................................. ... 4-4
4.1.4.1 Preliminary Identification Of Alluvial Valley Floor ......... .... 4-4B
4.1.5 Cultural And Historic Resources ................................................ .... 4-5
4.2 GEOLOGIC OVERVIEW ...................................................................... 4-SA
4.2.1 Stratigraphy ................................................................................. 4-SA
4.2.2 Structure ...................................................................................... 4-6
4.2.3 Geologic Conditions ..................................................................... 4-6A
4.3 NATURE AND EXTENT OF COAL DEPOSITS .................................. 4-8
4.3.1 Nature Of The Coal .................................................................... 4-8
4.3.2 Extent Of The Deposits ............................................................... 4-9
4.3.2.1 Loma Seam ................................................................... 4-9
4.3.2.2 Carbonera Zone ............................................................. 4-10
4.3.2.3 Cameo Seam .................................................................. 4-10
• 4.3.2.4 Palisade Zone ................................................................ 4-11
4.3.3 Other NTmeral Values .................................................................. . 4-11
4.4 GRO UNDWATER HYDROLOGY ....................................................... 4-12
4.4.1 Regional Hydrogeology ................................................................. 4-12
4.4.2 Site Hydrogeology ........................................................................ 4-14
4.4.2.1 Characteristics Of Aquifers .............................................. 4-15A
4.4.3 Groundwater Quality .................................................................... 4-18
4.4.4 Impact Of Mining On Groundwater .............................................. 4-19
4.5 SURFACE WATER HYDROLOGY ...................................................... 4-15
4.5.1 Introduction ................................................................................. 4-20
4.5.2 Hydrologic Setting ....................................................................... 4-21
4.5.2.1 Regional Hydrology .......................................................... 4-21
4.5.2.2 Local Hydrology .............................................................. 4-22
4.5.2.3 Site Description ............................................................... 4-23
4.5.3 Data Analysis, Results And Discussion ......................................... 4-23
4.5.3.1 Long Term Average Flows ............................................... 4-23
4.5.3.1.1 Flow Regime Of East Salt Creek ........................ 4-24
4.5.3.1.2 Seasonal Flow Variations Of East Salt Creek ..... 4-25
4.5.3.1.3 Reliability Of The East Salt Creek Record .......... 4-25
4.5.3.1.4 Flow Regime Of Munger Creek ......................... 4-27
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M" Volume I Original Permit 9 - 3 - 96