Earthwork Methods - Introduction. 1 Phase 1, Month 2

Transcription

1 Date 1 May 2014 Job No/Ref TN-P2-CE-001 Earthwork Methods - Introduction This note provides a summary of the possible earthworks methods and plant to be employed during construction of the main shaft platform, process area platform and screening mounds at the Dove s Nest Farm. The methodology should be read in conjunction with the phasing plans YP-P2-CX-50 to YP-P2-CX-60 and sketches YP-P2-CX-61 to YP-P2-CX-6. It should be noted that whilst an assessment of the potential methods and plant requirements has been made, the actual quantity and type of plant used will depend on the working methods of, and plant available to, the selected contractor. The descriptions below should only be regarded as indicative of how the works may be executed and the type of plant likely to be involved, not as a definitive method statement. 1 Phase 1, Month 2 In preparation for the commencement of platform construction, topsoil and subsoil will be stripped from the footprint of Bunds A and B and deposited in separate stockpiles close to the bunds. will also be stripped from the footprint of the haul road and attenuation ponds and placed in stockpile. Swales to be formed around Bunds A and B. It is anticipated that topsoil will be stripped using a dozer to doze the topsoil into heaps which will be loaded into all terrain dumpers (ATD s) using a tracked excavator. is expected to be stripped using the excavator to load directly into ATD s. A dozer will be used to manage the stockpiles. The existing subsoil, topsoil, inert material and imported granular fill (6F2) will be loaded into ATD s using tracked excavators for transport to the locations shown on drawing YP-P2-CX70. and subsoil storage mounds will be formed by end tipping the soils and grading to level using a dozer. Fill placed into bunds A and B will be spread in layers using a dozer and compacted using a towed vibrating roller. Granular material used to construct the haul road will be spread in layers using a dozer and compacted using a self-propelled vibrating roller. Construction of the attenuation ponds will be commenced. Plant used in constructing the ponds will include a tracked excavator, ATD s, a dozer and towed vibrating roller. Typical plant in use during this stage would be: Nr tracked excavators (CAT 20 or similar) 6Nr ATD s (Volvo A0 or similar) nr Dozers (CAT D6 or similar) 2Nr towed vibrating roller (Bomag BW6 or similar) 1Nr self propelled single drum vibrating roller (Bomag BW21 or similar) J:\20000\ \0 ARUP\0-01 CIVIL\ RECORD COPIES\ MINEHEAD EARTHWORKS PHASING NARRATIVE\TN-P2-CE-001-REV 01 EARTHWORKS - OUTLINE DESCRIPTION OF ASSUMED WORKING METHOD DOCX Arup F0.1 Page 1 of 8

2 Date 1 May 2014 Job No/Ref TN-P2-CE-001 In addition to earthworks tree clearance will commence for the southern access and bund D, and existing farm buildings will be demolished. It is anticipated that additional plant used in these site clearance activities will include: 1 Nr hydraulic platform 1 Nr forestry harvester 1Nr forestry forwarder Construction of the recharge borehole will also commence using a rotary water well drilling rig, e.g. Dando Watertec Phase 1, Month Construction of drainage attenuation ponds will be completed using a tracked excavator loading directly to ATD s and swales/ ditches will be formed along the eastern and northern site boundary to direct run-off from areas to be stripped of soils into the ponds. and subsoil will be stripped from the footprint of Bund F and predominantly placed in stockpile using the same techniques as described in Section 1 above. A proportion of the soils will be transported to bund A for use in restoration. and subsoil stripping beneath the footprint of Bund F will commence from the north-eastern corner. Initially topsoil will be dozed into a bund along the eastern boundary and eastern part of the northern boundary. that cannot be accommodated here will be loaded into ATD s using a tracked excavator and transported to stockpile. will be loaded directly into ATD s using a tracked excavator and transported to stockpile. Stockpiles will be managed by a dozer. Temporary ditches will be formed around the toe of temporary storage mounds to control run-off. Once sufficient area has been stripped, construction of Bund F will commence using superficial soils excavated from the main shaft platform. The soils will be spread in layers using a dozer and compacted using a self-propelled vibrating roller. Bulk excavation of superficial soils from the main shaft platform will be undertaken using tracked excavators loading directly into ATD s. It is anticipated that two excavators and four ATD s would be employed on this task. Where excavation below rockhead cannot be achieved using tracked excavators, the rock will be ripped using a heavy dozer equipped with a ripper. This will be confined to the western half of the shaft platform. Rock will be loaded into ATD s and transported to a crusher which will be located within the shaft platform area. Crushed rock will be loaded into ATD s using a tracked excavator and used to make up levels beneath the eastern half of the main shaft platform where it will be spread in layers by dozer and compacted using a self-propelled vibrating roller. Once sufficient area of Bund F has been completer to the required level, topsoil and subsoil stripping will commence for Bund D, the soils being transported directly to Bund F for use in restoration. will be spread using a low ground pressure dozer; topsoil will by placed by tracked excavator by loose tipping. Bund B will be completed using superficial soils excavated from the main shaft platform. Bunds A and B will be restored by spreading subsoil and topsoil. Soils will be excavated from stockpile by J:\20000\ \0 ARUP\0-01 CIVIL\ RECORD COPIES\ MINEHEAD EARTHWORKS PHASING NARRATIVE\TN-P2-CE-001-REV 01 EARTHWORKS - OUTLINE DESCRIPTION OF ASSUMED WORKING METHOD DOCX Arup F0.1 Page 2 of 8

3 Date 1 May 2014 Job No/Ref TN-P2-CE-001 tracked excavator and transported in ATD s. will be spread using a low ground pressure dozer; topsoil will by placed by tracked excavator by loose tipping. Construction of the recharge borehole will continue. Typical plant in use during this stage would be: 4Nr tracked excavators ( x CAT 20 or similar, 1 x CAT6) 8Nr ATD s (4 xvolvo A0 or similar, 4 x Volvo A40 or similar) 4nr Dozers ( x CAT D6 or similar, 1 x CATD9 or similar) 1Nr towed vibrating roller (Bomag BW6 or similar) 1Nr self propelled single drum vibrating roller (Bomag BW21 or similar) 1Nr motor grader (CAT 120M2 or similar) 1Nr crusher, e.g Sandvik QJ 0. Phase 1, Month 4 Excavation of superficial soils from the main shaft platform will continue using the plant and methods described above. Where excavation below rockhead cannot be achieved using tracked excavators, the rock will be ripped using a heavy dozer equipped with a ripper. This will be confined to the western half of the shaft platform. Rock will be loaded into ATD s and transported to a crusher which will be located within the shaft platform area. Crushed rock will be loaded into ATD s using a tracked excavator and used to make up levels beneath the eastern half of the main shaft platform where it will be spread in layers by dozer and compacted using a self-propelled vibrating roller. Construction of Bund F will continue using arisings from the main shaft platform. As the height of the bund increases, successive lifts will be commenced by depositing material to form an attenuation/screening bund around the eastern and northern margin behind which the arisings from the shaft platform will be spread and compacted, as illustrated on drawings YP-P2-CX-61 to YP- P2-CX-6. As areas of the Bund F are completed to the required level, subsoil and topsoil will be taken from stockpile using a tracked excavator, loaded into ATD's and transported to Bund F for use in restoration. In addition soil stripping for Bund E will commence using the techniques described previously, the soils being transported directly to Bund F for use in restoration. will be spread using a low ground pressure dozer; topsoil will by placed by tracked excavator by loose tipping. Construction of Bund D will commence using arisings from the main shaft platform. The methods for excavation transport and deposition will be as described previously. will be taken from stockpile using a tracked excavator, loaded into ATD's and transported to the ponds where it will be spread using a dozer. Construction of the recharge well will be completed and construction of headworks will be commenced. J:\20000\ \0 ARUP\0-01 CIVIL\ RECORD COPIES\ MINEHEAD EARTHWORKS PHASING NARRATIVE\TN-P2-CE-001-REV 01 EARTHWORKS - OUTLINE DESCRIPTION OF ASSUMED WORKING METHOD DOCX Arup F0.1 Page of 8

4 Date 1 May 2014 Job No/Ref TN-P2-CE-001 Typical plant in use during this stage would be: 4Nr tracked excavators ( xcat 20 or similar, 1 x CAT6) 8Nr ATD s (4 xvolvo A0 or similar, 4 x Volvo A40 or similar) 4nr Dozers ( x CAT D6 or similar, 1 x CATD9 or similar) 1Nr towed vibrating roller (Bomag BW6 or similar) 2Nr self propelled single drum vibrating roller (Bomag BW21 or similar) 1Nr motor grader (CAT 120M2 or similar) 1Nr crusher, e.g Sandvik QJ 0. 4 Phase 1, Month 5-6 and subsoil from the laydown area will be excavated and transported to temporary stockpile using tracked excavators and ATD s as described above. The laydown area will be prepared by spreading crushed stone. The stone will be transported from stockpile using ATD's, spread using a dozer and compacted using a self propelled vibrating roller. The completed eastern part of Bund D will be restored using subsoil and topsoil taken from the MTS shaft laydown areas, from stockpile and from the ventilation exhaust shaft platform area. Soil placement will be as described previously. Construction of Bund E will commence using arisings from the construction of the laydown area. As the eastern slope of Bund E is completed to level, it will be restored using subsoil and topsoil taken from the MTS shaft laydown areas and from stockpile. Construction of the groundwater interceptor and reinfiltration layer will be undertaken on the main shaft platform. Imported drainage media will be spread using a dozer and compacted using a self propelled vibrating roller. On completion of the groundwater drainage and recharge layer a geosynthetic layer will be placed using a tracked excavator fitted with a spreader bar to lift and transport the geosynthetic rolls. The geosynthetic will be covered immediately after placing with a layer of crushed rock which will be spread by dozer and compacted using a self-propelled vibrating roller. The surface water collector drain will be constructed using a tracked excavator to form a trench, place pipe sections and place backfill materials. Surface water drainage will be constructed. A tracked excavator will be employed to excavate trenches, stacking the arisings at the side of the excavation. A tractor and trailer will be used to transport pipe sections. Pipe bed and surround materials will be transported using a 6 tonne dumper and placed using the tracked excavator. Excavated material will be placed back into the trenches using the tracked excavator and compacted using a trench roller. Surplus spoil will be spread using a dozer and compacted using a self-propelled vibrating roller. Typical plant in use during this stage would be: 4Nr tracked excavators ( xcat 20 or similar) 10Nr ATD s (6 xvolvo A0 or similar 4 x Volvo A40 or similar) J:\20000\ \0 ARUP\0-01 CIVIL\ RECORD COPIES\ MINEHEAD EARTHWORKS PHASING NARRATIVE\TN-P2-CE-001-REV 01 EARTHWORKS - OUTLINE DESCRIPTION OF ASSUMED WORKING METHOD DOCX Arup F0.1 Page 4 of 8

5 Date 1 May 2014 Job No/Ref TN-P2-CE-001 1Nr 6 tonne dumper nr Dozers ( x CAT D6 or similar) 1Nr self-propelled single drum vibrating roller (Bomag BW21 or similar) 1 Nr trench roller (Bomag BMP8500 or similar) 1Nr motor grader (CAT 120M2 or similar) 1 Nr tractor and trailer 5 Phase 2 Month 6 17 and subsoil will be stripped from the central part of Bund E and transported to temporary stockpile using the methods described previously. Trees and topsoil will be stripped from the temporary stockpiling area adjacent to the welfare facility using the methods described previously. will be stockpiled adjacent to the temporary storage area. The basal area of the Bund D pyritic mudstone storage area will be prepared by excavating and relaying the top 1m of the glacial till. The clay will be excavated using a tracked excavator, transported in ATD's and replaced in layers compacted using a self propelled vibrating sheepsfoot roller. Refer to YPL summary for excavation and construction methods for the box cuts, headframe chambers and shafts. Suitable rock from the excavations will be transported to a processing area on the process plant platform where it will be crushed and stockpiled for re-use. Plant in use in the rock processing area is expected to include 1 tracked excavator and 1 crusher. The excavator will be used to load the crusher and to load the crushed rock into ATD s for distribution around the site. Other excavated material will be loaded into ATD s and transported either to temporary storage or to Bunds D and E, where it will be spread using a dozer and compacted using a self-propelled vibrating roller. and subsoil will be stripped from the southern access road and used to restore Bund E. Soil stripping and placement will be undertaken using the methods described previously. The haul road will be constructed using crushed rock from stockpile. haul road construction material will be loaded using a tracked excavator, transported in ATD's spread using a dozer and compacted using a self propelled vibrating roller. Restoration of Bund E will be completed towards the end of the period using topsoil and subsoil taken from stockpile using the same plant and methods described previously. Typical plant in use during this stage (in addition to plant within the headframe and box cut excavations) would be: 4Nr tracked excavators (2 xcat 20 or similar) 14Nr ATD s (10 xvolvo A0 or similar 4 xvolvo A40 or similar) nr Dozers (2 x CAT D6 or similar) 2Nr self-propelled single drum vibrating roller (Bomag BW21 or similar) J:\20000\ \0 ARUP\0-01 CIVIL\ RECORD COPIES\ MINEHEAD EARTHWORKS PHASING NARRATIVE\TN-P2-CE-001-REV 01 EARTHWORKS - OUTLINE DESCRIPTION OF ASSUMED WORKING METHOD DOCX Arup F0.1 Page 5 of 8

6 Date 1 May 2014 Job No/Ref TN-P2-CE-001 1Nr motor grader (CAT 120M2 or similar) 1Nr crusher, e.g Sandvik QJ 0. 6 Phase Month The central part of bund F will be prepared for the deposit of pyritic mudstone. temporarily stored in this area will be removed using tracked excavator and ATD's and used to restore the western area of Bund D and the ventilation exhaust shaft platform where it will be spread using a dozer. The basal area will be prepared by excavating and re-laying the top 1m of the glacial till. The clay will be excavated using a tracked excavator, transported in ATD's spread in layers using a dozer and compacted using a self propelled vibrating sheepsfoot roller. The temporary non-hazardous non-inert storage area will be prepared by re-engineering a 1m thick layer of clay to form a basal liner using similar methods to those described above. Spoil from the main shafts will be transported in ATD s to temporary store or to Bunds D and F where it will be spread using a dozer and compacted using a self propelled vibrating roller. Restoration of the western part of Bund D will commence using subsoil and topsoil taken from temporary stockpile. All working methods will be as described previously. It is noted that the extent to which this is completed will be dependent upon weather and ground conditions during the second half of this period. Typical plant in use during this stage (in addition to plant within the shaft excavations) would be: 2Nr tracked excavators (2 xcat 20 or similar) 10Nr ATD s (6 xvolvo A0 or similar 4 x Volvo A40 or similar) nr Dozers (2 x CAT D6 or similar) 2Nr self-propelled single drum vibrating rollers (Bomag BW21 or similar) 1Nr motor grader (CAT 120M2 or similar) 7 Phase 4 Month 25 2 The western area of Bund F and the first quarter of Bund C will be prepared for the deposition of pyritic mudstone. and subsoil will be stripped and transported to temporary stockpile using the methods described previously, following which the basal areas will be prepared by excavating and re-laying the top 1m of the glacial till. The clay will be excavated using a tracked excavator, transported in ATD's and replaced in layers compacted using a self propelled vibrating sheepsfoot roller. Restoration of Bund D will be completed once weather and ground conditions permit using a tracked excavator to load subsoil/topsoil from stockpile into ATD s for transport, subsoil being spread using a low ground pressure dozer and topsoil placed by tracked excavator. Spoil from the shafts will continue to be transported in ATD s to Bund F and Bund C where it will be spread using a dozer and compacted using a self propelled vibrating roller. J:\20000\ \0 ARUP\0-01 CIVIL\ RECORD COPIES\ MINEHEAD EARTHWORKS PHASING NARRATIVE\TN-P2-CE-001-REV 01 EARTHWORKS - OUTLINE DESCRIPTION OF ASSUMED WORKING METHOD DOCX Arup F0.1 Page 6 of 8

7 Date 1 May 2014 Job No/Ref TN-P2-CE-001 The north-western part of Bund F will be completely filled and restored during this period. All working methods as described previously. and subsoil will be stripped from the footprint of the Welfare Area and transported to stockpile using the plant and methods described previously. The welfare area construction platform will be constructed using crushed rock from stockpile in the process. The crushed rock will be loaded using a tracked excavator, transported in ATD s, spread using a dozer and compacted using a self-propelled vibrating roller. Non-hazardous, non-inert waste will be transported in ATD s from the main shaft excavations to the temporary storage area where it will be spread, graded and compacted using a dozer towed vibrating roller. Non-hazardous non-inert material for disposal off-site will be loaded from the stockpile into road-going 4-axle tippers using a tracked excavator Typical plant in use during this stage (in addition to plant within the shaft excavations) would be: Nr tracked excavators ( x CAT 20 or similar) 10Nr ATD s (6 xvolvo A0 or similar 4 x Volvo A40 or similar) nr Dozers ( x CAT D6 or similar) 2Nr self-propelled single drum vibrating rollers (Bomag BW21 or similar) 1Nr towed vibrating roller e.g. Bomag BW6. 1Nr motor grader (CAT 120M2 or similar) 8 Phase 5 Month - 40 The footprint of Bund C will be continue to be prepared in stages for the deposition of pyritic mudstone. and subsoil will be stripped and transported to temporary stockpile using the methods described previously, following which the basal areas will be prepared by excavating and re-laying the top 1m of the glacial till. The clay will be excavated using a tracked excavator, transported in ATD's and replaced in layers compacted using a self propelled vibrating sheepsfoot roller. Spoil from the shafts will continue to be hauled in ATD's to Bund C where it will be spread using a dozer and compacted using a self propelled roller. Restoration of Bund C will commence using subsoil and topsoil taken from stockpile and placed using the plant and methods described previously. Non-hazardous non-inert material for disposal off-site will be loaded from the stockpile into roadgoing 4-axle tippers using a tracked excavator Typical plant in use during this stage (in addition to plant within the shaft excavations) would be: Nr tracked excavators (2 xcat 20 or similar) 8Nr ATD s (6 xvolvo A0 or similar) 2nr Dozers (2 x CAT D6 or similar) 2Nr self-propelled single drum vibrating rollers (Bomag BW21 or similar) J:\20000\ \0 ARUP\0-01 CIVIL\ RECORD COPIES\ MINEHEAD EARTHWORKS PHASING NARRATIVE\TN-P2-CE-001-REV 01 EARTHWORKS - OUTLINE DESCRIPTION OF ASSUMED WORKING METHOD DOCX Arup F0.1 Page 7 of 8

8 Date 1 May 2014 Job No/Ref TN-P2-CE-001 1Nr towed vibrating roller e.g. Bomag BW6. 9 Phase 6 Month 41 onward Inert material will be taken from temporary stockpile and transported to complete Bunds G and H. The material will be loaded using a tracked excavator, transported in ATD's, spread using a dozer and compacted using a self propelled vibrating roller. As bunds G and H are completed to the required levels, they will be restored using subsoil and topsoil taken from temporary stockpiles using the same plant and methods described previously. Restoration of Bund C will be completed using subsoil and topsoil taken from stockpile and placed using the plant and methods described previously. Non-hazardous non-inert material for disposal off-site will be loaded from the stockpile into roadgoing 4-axle tippers using a tracked excavator. The temporary inert material storage area will be restored using topsoil from temporary stockpile using the same plant and methods described previously. Typical plant in use during this stage (in addition to plant within the shaft excavations) would be: Nr tracked excavators (2 xcat 20 or similar) 6Nr ATD s (6 xvolvo A0 or similar) 2nr Dozer (CAT D6 or similar) 1Nr self-propelled single drum vibrating rollers (Bomag BW21 or similar) 10 General Notes 1. Drainage attenuation ponds and swales around the eastern and northern site boundary to be formed at commencement of early works. 2. Where temporary storage mounds are used for storage of topsoil, subsoil or other arisings, temporary ditches will be formed around the toe of the mounds to control run-off.. Placing of restoration soils will be limited to suitable seasons when the soils are in a dry, friable condition. 4. When restoration soils are being placed on the areas of the mounds containing pyritic mudstone, a geocomposite drainage layer will be placed beneath the sub-soil. It is anticipated that the geocomposite will be deployed by hand, with a tractor and trailer used to transport rolls and a tracked excavator to lift rolls into position prior to deployment. J:\20000\ \0 ARUP\0-01 CIVIL\ RECORD COPIES\ MINEHEAD EARTHWORKS PHASING NARRATIVE\TN-P2-CE-001-REV 01 EARTHWORKS - OUTLINE DESCRIPTION OF ASSUMED WORKING METHOD DOCX Arup F0.1 Page 8 of 8

9 A B A C D E F G Key: N / subsoil strip Existing 6F2 import forming existing platforms to be re-used for access road construction 1 Temporary subsoil storage bund Temporary topsoil bund Temporary non hazardous, non inert bund 12,474m (891) Temporary inert bund BUND B BUND A 45,802m 12,474m 17,98m 7,261m (519) BUND C Demolition,226m (17) Strip topsoil / subsoil 28,91m (2,065) 10,17m (724) 2 7,810m (559) 2,487m (19),615m,615m 1,066m (62) 2,482m (169) Strip topsoil, subsoil & inert material 62m (4) 7,819m 7,817m,0m,0m,0m (180) 21,15m 4, 12 5,000m (268) Access Road Construction Total capacity 40,000m Quantity in bund 18,812m Inert material Other 12,927m (62) Ongoing earthworks Temporary Platform Strip topsoil / subsoil Potential ecology relocation between month 2 and month 12 Restoration complete 4,72m 28,91m Number of loads 11/04/14 28/0/14 1/0/14 Date By Chkd Appd m 0 (57) 5,147m (68) 02,11m (2,8) Demolition Form access road 8m ), 9 (2 ) (29 Rev 0 Rev ,649m 6,649m Rev 01 Tree clearance BUND E Tree clearance,498m BUND D BUND F 4 Strip topsoil / subsoil 1,401m Proposed men and materials drift portal location, works start during phase 2 Strip topsoil / subsoil from pond area retained for re-use within pond construction Existing power cable to be diverted Notes: 5» Form noise / screening bunds A and B following topsoil / subsoil strip» Bund A complete except for top soiling / subsoiling to be undertaken during month» Bund B construction commenced» Bund F commence topsoil strip within area of temporary subsoil storage bund 6» Existing imported 6F2 aggregate forming the temporary platforms to be re-used to create the haul road formation.» Other site clearance works including demolition of farm buildings and tree clearance Do not scale» Partial strip of topsoil from Bund C area» Temporary surface water drainage will need to be provided during construction until the permanent surface water attenuation ponds are constructed» Refer to the Landscape Architects landscaping proposals for the location of access roads leading to the attenuation ponds from pond area retained for re-use within pond construction Admiral House, Rose Wharf 78 East Street, Leeds, LS9 8EE Tel: +44 (0) Fax: +44 (0) Client York Potash Ltd Job Title York Potash Proposed Minehead Site Proposed Site Earthworks MTS Phasing Strategy Phase 1 - Month 2 February 2015» All existing springs / discharges within the earthworks footprint are to be permanently drained Scale at A» The number of loads assumes a vehicle with a payload of 28 tonnes Job No Drawing Staus Not to scale Discipline Drawing No YP-P2-CX Arup

10 A A B C D E F G Key: N / subsoil strip Temporary subsoil storage bund 1 Temporary topsoil bund 14,589m (1,042) Temporary non hazardous, non inert bund Temporary inert bund Restoration complete Ongoing earthworks BUND B 7,817m (559) 2 4,72m 4,72m 4,685m (251) Potential ecology relocation between month 2 and month 12 14,054m (1,004) 45,802m 45,802m,025m (216) BUND A,615m (194),615m 0m,44m 7,819m 0m BUND C Platform Temporary Platform Access Road Construction Total capacity 40,000m Quantity in bund 18,812m Inert material Other 16,468m,0m,0m Number of loads 0,8m (29) 1,066m (62) 4,061m (218) 11,006m 11,006m 02 Form Access Road 28/0/14 BUND E 1/0/14 Date By Chkd Appd Rev ,649m 6,649m 20,216m Rev 01 1,087m (5 (59) BUND F 244,24m 82,42m BUND D 1,401m 74m 194,286m 0m Permanent drainage to be provided to drain an existing spring / discharge Form drainage attenuation ponds Permanent drainage to be provided to drain wet area Form drainage attenuation ponds 2,96m (210) 16,878m (1,205) 47,5m (,81),498m 1,218m S 17 oft,6 so 00 ils m Form drainage attenuation ponds 5 11/04/14 Rev 0 4 (57) Admiral House, Rose Wharf 78 East Street, Leeds, LS9 8EE Tel: +44 (0) Fax: +44 (0) Client York Potash Ltd Excavate soft soils, store on site and condition for use in Bund F construction 5,879m (15) Job Title York Potash Proposed Minehead Site 2,041m (146) 4,19m (22) Notes:» Bund A and B complete» Bund F - ongoing topsoil and subsoil strip and start bund formation from north eastern corner of the site. Towards end of peroid start placing restoration subsoil and topsoil» Ongoing formation of drainage attenuation ponds 6» Create temporary topsoil and subsoil storage bund within the outline of the future Bund C area» The number of loads assumes a vehicle with a payload of 28 tonnes Do not scale 1,169m (926) Proposed Site Earthworks MTS Phasing Strategy Phase 1 - Month March 2015 Scale at A Not to scale Discipline Job No Drawing Staus Drawing No YP-P2-CX Arup

11 A A B C D E F G Key: N / subsoil strip Temporary subsoil storage bund 1 Temporary topsoil bund Temporary non hazardous, non inert bund Temporary inert bund Restoration complete Ongoing earthworks Temporary Platform BUND B BUND A Potential ecology relocation between month 2 and month 12 2 Access Road Construction 40,000m Quantity in bund 18,812m,44m Inert material Laydown Area Platform & Earthworks Other BUND C Total capacity 16,468m Number of loads (57) 0m 0 BUND E 10,2m 75,815m 14,98m 49,407m (,529),0m (181) 14,98m (1,029) 6,649m 6,649m 11/04/14 28/0/14 1/0/14 Date By Chkd Appd Rev 0 02 Rev Rev 01,42m BUND F BUND D 194,286m 49,407m,498m 0m 1,027m 0m 942m (51) 244,24m 112,018m 16,79m (1,200) 76m (4) 6,906m (494) 65m (5) 1,60m (7) 74m (21) 1,218m (66) 4 146m (11) 1,087m (59) Admiral House, Rose Wharf 78 East Street, Leeds, LS9 8EE Tel: +44 (0) Fax: +44 (0) Client York Potash Ltd Job Title York Potash Proposed Minehead Site 44m () 2,96m (210) 2,041m (146) 5 from pond area retained for re-use within pond construction Proposed Site Earthworks MTS Phasing Strategy Phase 1 - Month 4 April 2015 Scale at A Not to scale Discipline 6 Notes:» The number of loads assumes a vehicle with a payload of 28 tonnes Do not scale Job No Drawing Staus Drawing No YP-P2-CX Arup

12 A A B C D E F G Key: N / subsoil strip Temporary subsoil storage bund 1 Groundwater reinfiltration provision to be constructed beneath the main shaft platform and platform drainage installed Temporary topsoil bund Hardstanding area to be formed for ventilation exhaust shaft construction Temporary non hazardous, non inert bund Temporary inert bund 1,570m (85) Restoration complete Ongoing earthworks Temporary Platform BUND B BUND A Potential ecology relocation between month 2 and month ,786m (42) 6,181m (442),84m (249) 16,80m (1,200) 26,28m 40,000m Quantity in bund 18,812m 9,042m (646) BUND C Platform 1,609m (64) 0,959m 5,5m (287) Inert material Other Number of loads 4,585m (78) 5,000m (268) 0 (57) 11/04/14 28/0/14 1/0/14 Date By Chkd Appd Rev 0 9m ) (5 BUND E 8,826m 26,906m 0m 0m,42m (245) BUND D 5,765m (09) 194,286m 72,978m,509m (188) 64m (46) 4,414m (15) 8,819m (60) Total capacity Laydown Area 4 Access Road Construction Rev ,649m 6,649m Rev 01 BUND F 244,24m 112,018m Admiral House, Rose Wharf 78 East Street, Leeds, LS9 8EE Tel: +44 (0) Fax: +44 (0) ,90m (5) Client York Potash Ltd Job Title York Potash Proposed Minehead Site 5 Notes:» Finish profiling the laydown area» Complete main shaft platform to level and undertake drainage works to platform and laydown area 6 Proposed Site Earthworks MTS Phasing Strategy Phase 1 - Month 5-6 May - June 2015 Scale at A Not to scale» The number of loads assumes a vehicle with a payload of 28 tonnes Discipline Job No Drawing Staus» and subsoil strip of main shaft platform laydown area and exhaust ventilation shaft platform, including installation of drainage Do not scale Drawing No YP-P2-CX-07 0 Arup

13 A B A C D E F G Key: N / subsoil strip 1 Processed rock to access road and welfare platform Temporary subsoil storage bund Potential construction laydown area for works associated with the box cut, including potential temporary spoil storage area Temporary topsoil bund Temporary non hazardous, non inert bund Temporary inert bund Restoration complete Ongoing earthworks Temporary Platform BUND B 2 Vegetation clearance to be followed by top soil strip. (Assume this occurs after month 12) BUND A Rock to stockpile 42,655m 1,169m (941) BUND C Head frame chambers & associated ventilation shaft construction 6,24m (452) 4,872m (48) 7,180m (51) 40,000m Quantity in bund 18,812m Laydown Area Inert material 1,907m (102) Other 451m (24) Total capacity 4,51m 1,624m (87) Access Road Construction Number of loads 4,09m (57) 5,016m (269) Second phase of access road construction (2,8 m 8,826m 8,826m 28/0/14 1/0/14 Date By Chkd Appd MTS , BUND E 11/04/14 Rev 0 Rev Rev 01 6,649m 6,649m BUND F 244,24m 112,018m d BUND D 194,286m 88,620m 4 Pyritic mudstone 15,642m (1,118) Box cut Inert to access road 10,294m 81,269m 0 92) 5,016m ne chur Clay ing n for li Admiral House, Rose Wharf 78 East Street, Leeds, LS9 8EE Tel: +44 (0) Fax: +44 (0) Client York Potash Ltd Proposed men and materials drift portal construction. Construction works commence and are complete during phase 2 Job Title York Potash Proposed Minehead Site 2,10m (114) 5 6,675m (477) Notes:» Commence head frame chamber, box cut and drift construction, (unsuitable rock to be placed within temporary stockpile)» Useable rock to be processed and stockpiled for future construction use 6» Drift box cut works commenced and completed during this phase Proposed Site Earthworks MTS Phasing Strategy Phase 2 - Month 7-17 July May 2016 Scale at A Not to scale Discipline» The number of loads assumes a vehicle with a payload of 28 tonnes Job No Drawing Staus » Pyritic mudstone waste to be placed in Bund D Drawing No YP-P2-CX Do not scale Arup