2020-06-25_REVISION - C1981019 ‎(3)‎

• Permit No: C1981019
• IBM Index Class Name: Revision
• Doc Date: 6/25/2020
• Doc Name: Proposed Revision Materials
• From: Colowyo Coal Company, LP
• To: DRMS
• Type & Sequence: MR218
• Email Name: ZTT
• Email Name: JDM
• Media Type: D
• Archive: No

FIGURES
Contents
FIGURE 1 GENERAL LOCATION MAP........................................................................................................... 1
FIGURE 2.03-1 PROPOSED NEWSPAPER ADVERTISEMENT...........................................................................2
FIGURE 2.04.6-1 GENERAL STRUCTURAL SETTING..................................................................................... 3
FIGURE 2.04.6-2 GENERALIZED STRATIGRAPHIC COLUMN.........................................................................4
FIGURE 2.04.7-1 DRAWDOWN CURVE ........................................................................................................ 5
FIGURE 2.04.7-2 TIME DRAWDOWN PLOT..................................................................................................6
FIGURE 2.04.7-3 TAYLOR CREEK FLOWS 1975-1981.................................................................................. 7
FIGURE 2.04.7-4 WILSON CREEK FLOWS 1975-1981.................................................................................. 8
FIGURE 2.04.7-5 GOODSPRING CREEK FLOWS 1975-1981.......................................................................... 9
FIGURE 2.04.7-6 MEAN,MAX,MIN AND STANDARD DEVIATION OF PH UNITS MEASURED FOR
WATERSHEDS NEAR COLOWYO MINE 1975-1981 .................................................................................... 10
FIGURE 2.04.7-7 MEAN,MAX,MIN AND STANDARD DEVIATION OF TDS UNITS MEASURED FOR
WATERSHEDS NEAR COLOWYO MINE 1975-1981 .................................................................................... 13
FIGURE 2.04.7-8 MEAN,MAX,MIN AND STANDARD DEVIATION FOR TSS IN MG/L FOR WATERSHEDS
NEAR COLOWYO MINE, 1975-1981.......................................................................................................... 14
FIGURE 2.04.7-9 MEAN,MAXIMUM,AND STANDARD DEVIATION FOR IRON(DISSOLVED µ/L FOR
WATERSHEDS NEAR COLOWYO MINE, 1975-1981 .................................................................................. 15
FIGURE 2.04.7-10 MEAN,MAXIMUM,AND STANDARD DEVIATION FOR IRON(DISSOLVED µ/L FOR
WATERSHEDS NEAR COLOWYO MINE, 1975-1981 .................................................................................. 16
FIGURE 2.04.7-11 MEAN,MAXIMUM,AND STANDARD DEVIATION FOR SUSPENDED SOLIDS(MG/L)FOR
WATERSHEDS NEAR COLOWYO MINE, 1975-1981................................................................................... 17
FIGURE 2.04.8-1 WIND ROSE—MINE SITE................................................................................................ 18
FIGURE 2.04.8-2 WIND ROSE—GOSSARD LOADOUT................................................................................ 19
FIGURE 2.04.10-1 ENVIRONMENTAL GRADIENT/PLANT TOLERANCE.......................................................20
FIGURE 2.05-1 TYPICAL PUBLISHED BLASTING SCHEDULE......................................................................21
FIGURE 2.05-2 TYPICAL BLASTING RECORD.............................................................................................23
FIGURE 2.05-3 TYPICAL COLOWYO CHARGEWEIGHT SHEET....................................................................25
FIGURE 2.05-4 SEISMOGRAPH REPORT.....................................................................................................26
FIGURE 2.05-5 SECTION 16 PIT EXTENSION..............................................................................................27
FIGURE 2.05-6 EAST PIT SEDIMENT CONTROL STRUCTURES....................................................................28
PAGE INTENTIONALLY LEFT BLANK.........................................................................................................29
FIGURE 4.12-1 WILD LAND FIRE AREA.................................................................................................... 30
FIGURE 4.12-2 WILD LAND FIRE AREA.................................................................................................... 31
THIS PAGE INTENTIONALLY LEFT BLANK.................................................................................................. 32
FIGURE 4.12-4 EMERGENCY ROAD LOCATION.......................................................................................... 33
FIGURE 4.12-5 2016 WILD LAND FIRE AREA............................................................................................ 34
FIGURE 4.12-6 2018 WILD LAND FIRE AREA............................................................................................ 35
FIGURE 4.12-7 2019 WILD LAND FIRE AREA............................................................................................ 36
FIGURE 4.15-1 DEMONSTRATION SHRUB PLOT......................................................................................... 37
FIGURE 4.18-1 RAPTOR PROTECTION RETROFITTING OF EXISTING POWER POLES.................................... 38
FIGURE 4.18-2 TYPICAL EAGLE-SAFE THREE-PHASE POLE CONFIGURATION...........................................40
FIGURE 4.18-3 TYPICAL EAGLE-SAFE THREE-PHASE POLE CONFIGURATION...........................................41
FIGURE 4.18-4 TYPICAL DISTRIBUTION SINGLE-PHASE POLE CONFIGURATION.......................................42
FIGURE 4.18-5 TYPICAL DISTRIBUTION THREE-PHASE POLE CONFIGURATION. .......................................43
FIGURE 4.18-6: TYPICAL DEADEND STRUCTURE POLE CONFIGURATION.................................................44
Figures Viii Revision Date: 5/14/20
Revision No.: MR-218