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SHERLEY ANN McELROY FUTURE ACCESS ROAD BRIAN HARRELL PROPOSED DRAINAGE DITCH ALIGNMENT 24" CMP INV=4634.1 ELECTRICAL TRANSMISSION TOWER 24" CMP - INV=4634.1 SLURRY WALL LAWRENCE & LOIS MONROE - INV=46 .7 24" CMP _ INV=4631.4 CHARLETTE CARLSON HOSHIKO FARMS, INC. FUTURE ACCESS PROPSED SLURRY ROAD WALL ALIGNMENT MINE PERMIT BOUNDARY FA 11 GARAGE I VERNIE & SYLVIA PARKER HOUSE gal" \ 7: ASLURR ALL n /'%r 11 t '� � Itlilllll 11 I I i r pry/ 1 � j i `iljl!JJ /1 J1 I l if i ! JiIJIJ C ` REWGETA ibN,1641j , // / I /I Illlllll )(5' BEL O MAX WATE ELEV#ON) I i MA�MUM 0ATERi SURFACE ELEVIII463211 ERI 026, <\ Illl__II V �I tit r P��Jlil r ��, I IIII) P OXIMI{TE J \ \ \ \ r — — 1 bl DP AIN \ II r r (AE~ IW'E0 TY d1S) 1j1i111ll\�� rA II TRUc SCALE /Z All tv I�llilllllll — / — vAL�.H0UW itII'11 I i — ZTo K -Raiowuy CR14DE-Ott TANK \ v J l� l(Te"@E-REMOVED \ 1,Jillll IIII WATER TAN \ / I�J�IIIlllli\� \ WELL/F` AD I (TBE REMO ) \\ \ I I GLOBAL ASSET RECOVERY, LLC EXCEL ENERGY OVERHEAI IECTRICDLINE �I NORTH WELD 1 WATER LINE I N BLit ENERGY I OIL/GAS UBUILDING tB E ENERGY OIL/GAS EPERATOR BIDE ENERGY OIL/GAS EIEPERATOR Ll OBLE ENERGY AAI SION CONTROL jl DEVICE I DUST & DIRT EXCAVATING, LLC II I II Q OLOFF SANDS #1-� f \ \ \\ \(TO �EIE PLUGGED) _Ji —) SE E R/ R I A A\ \ I / w \\ �(T0 B� R tHR WARE F'ENC� / I \\ �(T 113E f>;EMOIVED� I / I 1 I PIT I JJ J / \ — — ELBE / ��\ \10" STEEL PIPE - —Z NV=4633.0 10" STEEL PIPE ELECTRICAL FUTURE ACCESS VINV=4633.9 TRANSMISSION TOWER ROAD ELECTRICAL TRANSMISSION TOWER ROBERT KARL FRANCIS KOHLHOFF 100 0 100 200 ORIGINAL SCALE: 1"=100' DIANA I I = I GLOBAL ASSET TAYLOR I M I RECOVERY, LLC Ir I I CALL UTILITY NOTIFICATION CENTER OF COLORADO LA J --- 5 CALL 2—BUSINESS DAYS IN ADVANCE BEFORE YOU DIG, GRADE, OR EXCAVATE FOR THE MARKING OF UNDERGROUND MEMBER UTILITIES. NOTES: 1. ALL PROPOSED CONTOURS SHOWN ARE BASED ON THE APPROVED DIVISION OF MINING RECLAMATION & SAFETY PERMIT NUMBER M-1985-112 AND INCLUDE THE AMENDED AREA TO BE MINED. 2. OIL AND GAS FACILITIES ARE SHOWN WITH PERMANENT ACCESS AND MAY BE MINED AT A LATER DATE. 3. ALL SLOPES ARE TO BE GRADED TO A RECLAIMED SLOPE OF 3H:1 V. 4. NOMINAL TOPSOIL DEPTH ON SITE IS 0" — 18" WITH AN AVERAGE DEPTH OF 6" WHERE MINING HAS NOT OCCURRED. 5. ALL STOCKPILES SHALL BE LOCATED OUTSIDE OF THE 100—YR FLOODPLAIN. 6. THERE ARE NO OPERATIONAL IRRIGATION DITCHES ON—SITE. 7. THE AMENDED MINE PERMIT BOUNDARY IS 50' OFFSET FROM THE PROPERTY LINE IN THE NORTHEAST CORNER, WHICH IS CONSISTENT WITH THE ORIGINAL MINE PERMIT BOUNDARY ALONG THE SOUTH AND WEST PROPERTY LIMITS. 8. SEED MIX DESIGN PROVIDED BY THE GREELEY NRCS FIELD OFFICE SHALL BE UTILIZED IN THE AREAS TO BE RE—VEGETATED. THE MIX DESIGN IS FOR SANDY SOILS AND IS ATTACHED IN EXHIBIT E OF THE M-1985-112 MINE PERMIT AMENDMENT APPLICATION. 50.0 X OVERBURDEN AND TOPSOIL BAO MLL 25.0 = ALL DISTURBED AREAS TO WATER SURFACE Z NATIVE SOIL- z - BEDROCK TYPICAL SECTION - SLURRY WALL LINE LEGEND: — — — EXISTING RIGHT OF WAY — — — EXISTING ROADWAY CENTERLINE EXISTING INDEX CONTOUR -------------- EXISTING MINOR CONTOUR EXISTING PERMIT BOUNDARY EXISTING PROPERTY LINE W W W EXISTING WATER LINE EXISTING FENCE LINE PROPOSED 5 FOOT CONTOUR PROPOSED 1 FOOT CONTOUR 8. Post Construction Testing: /ONAt.E Moisture Content ASTM D2216 less than 10 percent Colorado State Engineers Office. 2. Water Specifications: 9. The above Specifications are provided as a general guideline for the DESIGN: JSV permitting process. Final specifications and design criteria will be DRAWN: JSV pH 6-8 CHECKED: JSV JOB NO. 141125 �Kyj �maep ilM Hardness less than 200 ppm SHEET NO. JANE E X - F Total Dissolved Solids less than 500 ppm MINING AND SAFETY 1 OF 1 Oil, Organics, Acids, Alkali less than 50 ppm each \\ Chloride report 3. Bentonite Slurry General Specifications: j The initial bentonite slurry must be tested prior to placement in the \\ Li cfl PIT O hydrated in slurry hydration ponds. In general, a minimum I Z Op hydration time of 8 hours will allow the bentonite slurry to meet all W criteria. A minimum bentonite content of 6 percent in the \ > O slurry by weight is required. LL_ Q U LL_ 4. Bentonite Slurry Testing Specifications before Placement: O Q � Viscosity Measured w/Marsh Funnel (API RP 1313-1) L.LJ less than 40 sec O Cn Density less than 64 pcf J Q _J LLJ Filtrate Loss less than 20 cm3 L.LJ pH 6.5 to 10 m R)AIF, U The test listed above should be run 1 or 2 times per shift and at least once per batch of slurry. The slurry must be further tested after placement in the trench. The test conducted are for viscosity, density, sand content, and pH. Two sets of tests per shift at two locations in teh trench (approximately 2 feet below the slurry surface and 2 feet above the bottom of the trench) are required. If the density of the slurry in trench exceeds 85 pcf, the excess solids must be removed by desanding, or the slurry replaced with fresh \ / I / \ — — ELBE / ��\ \10" STEEL PIPE - —Z NV=4633.0 10" STEEL PIPE ELECTRICAL FUTURE ACCESS VINV=4633.9 TRANSMISSION TOWER ROAD ELECTRICAL TRANSMISSION TOWER ROBERT KARL FRANCIS KOHLHOFF 100 0 100 200 ORIGINAL SCALE: 1"=100' DIANA I I = I GLOBAL ASSET TAYLOR I M I RECOVERY, LLC Ir I I CALL UTILITY NOTIFICATION CENTER OF COLORADO LA J --- 5 CALL 2—BUSINESS DAYS IN ADVANCE BEFORE YOU DIG, GRADE, OR EXCAVATE FOR THE MARKING OF UNDERGROUND MEMBER UTILITIES. NOTES: 1. ALL PROPOSED CONTOURS SHOWN ARE BASED ON THE APPROVED DIVISION OF MINING RECLAMATION & SAFETY PERMIT NUMBER M-1985-112 AND INCLUDE THE AMENDED AREA TO BE MINED. 2. OIL AND GAS FACILITIES ARE SHOWN WITH PERMANENT ACCESS AND MAY BE MINED AT A LATER DATE. 3. ALL SLOPES ARE TO BE GRADED TO A RECLAIMED SLOPE OF 3H:1 V. 4. NOMINAL TOPSOIL DEPTH ON SITE IS 0" — 18" WITH AN AVERAGE DEPTH OF 6" WHERE MINING HAS NOT OCCURRED. 5. ALL STOCKPILES SHALL BE LOCATED OUTSIDE OF THE 100—YR FLOODPLAIN. 6. THERE ARE NO OPERATIONAL IRRIGATION DITCHES ON—SITE. 7. THE AMENDED MINE PERMIT BOUNDARY IS 50' OFFSET FROM THE PROPERTY LINE IN THE NORTHEAST CORNER, WHICH IS CONSISTENT WITH THE ORIGINAL MINE PERMIT BOUNDARY ALONG THE SOUTH AND WEST PROPERTY LIMITS. 8. SEED MIX DESIGN PROVIDED BY THE GREELEY NRCS FIELD OFFICE SHALL BE UTILIZED IN THE AREAS TO BE RE—VEGETATED. THE MIX DESIGN IS FOR SANDY SOILS AND IS ATTACHED IN EXHIBIT E OF THE M-1985-112 MINE PERMIT AMENDMENT APPLICATION. 50.0 X OVERBURDEN AND TOPSOIL BAO MLL 25.0 = ALL DISTURBED AREAS TO WATER SURFACE Z NATIVE SOIL- z - BEDROCK TYPICAL SECTION - SLURRY WALL LINE LEGEND: — — — EXISTING RIGHT OF WAY — — — EXISTING ROADWAY CENTERLINE EXISTING INDEX CONTOUR -------------- EXISTING MINOR CONTOUR EXISTING PERMIT BOUNDARY EXISTING PROPERTY LINE W W W EXISTING WATER LINE EXISTING FENCE LINE PROPOSED 5 FOOT CONTOUR PROPOSED 1 FOOT CONTOUR SLURRY WALL NOTES: I 0 0 E E In�2 w w EM slurry. The slurry level must be maintained at least 3 feet above the ground water elevation and no more than two feet below the working platform. 5. Bentonite Slurry Testing Specifications after Placement: Unit Weight 1.03-1.40 g/cm3 Sand Content ASTM D4381-84 10-20 percent by volume 6. Soil—Bentonite Backfill Specifications: S—B Slump ASTM C143 1 set per 100 yd3 Slump 2-6 inches S—B Gradation 1 set per 300 yd3 Screen (US Std) Percent by Weight 3 in 100 #4 40-80 #40 25-60 #200 20-40 Minimum Plasticity Index of 10 7. Key Trench and Slurry Wall Cap Specifications: During excavation, sounding should be obtained to determine the elevations of the top of the key layer, the bottom of the excavation, and the bottom of the trench prior to backfilling. If sediments in excess of 2 inches have accumulated, it is necessary to clean the trench bottom by airlift pumps or excavation equipment to remove the sand and sediment that has settled. The trench bottom should be cleaned, as a minimum, at the beginning of each shift. Sounding should be obtained approximately every 20 feet. Adequate keying in the S—B backfill to an impermeable layer at the Z 1. Bentonite Specifications: % NO c O o a U p0R RR of the key in layer and describe how trench cuttings or other YP/PV ratio API Std. 13A Less than 3 observations will be used to assure the slurry wall will be adequately p`¢' C' keyed. Temporary slurry wall protection will be required in the form of a pG:o Viscometer greater than 30 > M N P-6 2 weeks) and replaced with a compacted clay cover over Filtrate Loss less than 15 cm3 v a 8. Post Construction Testing: /ONAt.E Moisture Content ASTM D2216 less than 10 percent Colorado State Engineers Office. 2. Water Specifications: 9. The above Specifications are provided as a general guideline for the DESIGN: JSV permitting process. Final specifications and design criteria will be DRAWN: JSV pH 6-8 CHECKED: JSV JOB NO. 141125 �Kyj �maep ilM Hardness less than 200 ppm SHEET NO. JANE E X - F Total Dissolved Solids less than 500 ppm MINING AND SAFETY 1 OF 1 Oil, Organics, Acids, Alkali less than 50 ppm each Chloride report 3. Bentonite Slurry General Specifications: j The initial bentonite slurry must be tested prior to placement in the Li cfl trench. The slurry may be mixed in high shear mixers or mixed and O hydrated in slurry hydration ponds. In general, a minimum I Z Op hydration time of 8 hours will allow the bentonite slurry to meet all W criteria. A minimum bentonite content of 6 percent in the > O slurry by weight is required. LL_ Q U LL_ 4. Bentonite Slurry Testing Specifications before Placement: O Q � Viscosity Measured w/Marsh Funnel (API RP 1313-1) L.LJ less than 40 sec O Cn Density less than 64 pcf J Q _J LLJ Filtrate Loss less than 20 cm3 L.LJ pH 6.5 to 10 m E):� U The test listed above should be run 1 or 2 times per shift and at least once per batch of slurry. The slurry must be further tested after placement in the trench. The test conducted are for viscosity, density, sand content, and pH. Two sets of tests per shift at two locations in teh trench (approximately 2 feet below the slurry surface and 2 feet above the bottom of the trench) are required. If the density of the slurry in trench exceeds 85 pcf, the excess solids must be removed by desanding, or the slurry replaced with fresh slurry. The slurry level must be maintained at least 3 feet above the ground water elevation and no more than two feet below the working platform. 5. Bentonite Slurry Testing Specifications after Placement: Unit Weight 1.03-1.40 g/cm3 Sand Content ASTM D4381-84 10-20 percent by volume 6. Soil—Bentonite Backfill Specifications: S—B Slump ASTM C143 1 set per 100 yd3 Slump 2-6 inches S—B Gradation 1 set per 300 yd3 Screen (US Std) Percent by Weight 3 in 100 #4 40-80 #40 25-60 #200 20-40 Minimum Plasticity Index of 10 7. Key Trench and Slurry Wall Cap Specifications: During excavation, sounding should be obtained to determine the elevations of the top of the key layer, the bottom of the excavation, and the bottom of the trench prior to backfilling. If sediments in excess of 2 inches have accumulated, it is necessary to clean the trench bottom by airlift pumps or excavation equipment to remove the sand and sediment that has settled. The trench bottom should be cleaned, as a minimum, at the beginning of each shift. Sounding should be obtained approximately every 20 feet. Adequate keying in the S—B backfill to an impermeable layer at the base of the wall will be required and specified in the final design report for the slurry wall. The design documents will include a description p0R RR of the key in layer and describe how trench cuttings or other 0�. .... S� Vq'C;.; observations will be used to assure the slurry wall will be adequately p`¢' C' keyed. Temporary slurry wall protection will be required in the form of a pG:o non—compacted soil cover placed within one day over each backfilled 100 1 1-4:foot reach. The temporary cover is removed after settlement(approximately P-6 2 weeks) and replaced with a compacted clay cover over the completed slurry wall. ��SS � %/� \ 8. Post Construction Testing: /ONAt.E Post construction testing will be conducted in accordance with the Colorado State Engineers Office. DATE: 12/30/14 9. The above Specifications are provided as a general guideline for the DESIGN: JSV permitting process. Final specifications and design criteria will be DRAWN: JSV developed during the the final design of the slurry wall. CHECKED: JSV JOB NO. 141125 �Kyj �maep ilM SHEET NO. JANE E X - F DM310N OF RECIAMAMON MINING AND SAFETY 1 OF 1