PERMFILE131734

• Permit No: C1981020A
• IBM Index Class Name: Permit File
• Doc Date: 5/31/2002
• 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 Iistoric 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 NAT URE 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 Cazbonera Zone ............................................................. 4-10
4.3.2.3 Cameo Seam ................................................................. . 4-10
• 4.3.2.4 Palisade Zone ............................................................... . 4-11
4.3.3 Other Mineral Values .................................................................. . 4-1 I
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 .............................................. 4-1 SA
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

M" Volume I Original Permit 9 - 3 - 96