m³ R R m 3.km R 8.00 R

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1 CLEAN WATER DRAINS SECTION 01 - "CLEAN" WATER DRAINS 1.1 SABS 1200C SITE CLEARANCE Clear and Grub m R R SABS 1200DA EARTHWORKS (SMALL WORKS) b) Excavate in all material and place in berm located along downstream side, stockpile and backfill or dispose for i) Open Drains m R R c) Extra-over items for : ) Intermediate excavation m³ R R ) Hard rock excavation m³ 420 R R mm thick Waste Rock Lining Layer to drain bed. Borrow from stockpile by others ("clean" waste rock from mining operations Stockpiled by "Others"). Rate covers only for hand picking and placing of waste rock overlay. Waste Rock is free in stockpile m³ R R d) Extra-over items hauling borrow material to site (Assumed Haulage Distance = 3.5km) free haul = 1km m 3.km R 8.00 R Topsoiling m R R Grassing m R R SABS1200 MK KERBING AND CHANNELLING Trimming of excavations for Open Drains in: a) Intermediate excavation m R R b) Hard rock excavation m R R SANS 1200 DK GABIONS AND PITCHING SURFACE PREPARATION Surface preparation for bedding of gabions/reno mattresses. m² R R GABIONS BOXES i) 1 x 1 x 1m m³ R ii) 1.5 x 1 x 1m m³ R SUB-TOTAL (CARRIED FORWARD) R

2 CLEAN WATER DRAINS BROUGHT FORWARD GABION MATTRESSES R i) 2 x 1 x 0.3m m³ 120 R R ii) 3 x 1 x 0.3m m³ 116 R R GEOTEXTILE Geofrabric wrapping (A5 Biddim or Similar Approved) m² 780 R R SUB-TOTAL: CLEAN WATER DIVERSION DRAIN & EARTH BERMS (Carried to Summary) R

3 HIGH INTENSITY ENERGY DISSIPERSION STRUCTURES ALONG DRAIN ALIGNMENTS DESCRIPTION UNIT QTY RATE SECTION 02 - HIGH INTENSITY ENERGY DISSIPERSION STRUCTURES ALONG DRAIN ALIGNMENTS AMOUNT 2.1 SANS 1200 DK GABIONS AND PITCHING SURFACE PREPARATION Surface preparation for bedding of gabions/reno mattresses. m² R R GABIONS BOXES i) 1 x 1 x 1m m³ 550 R R ii) 1.5 x 1 x 1m m³ 220 R R GABION MATTRESSES i) 2 x 1 x 0.3m m³ 250 R R ii) 3 x 1 x 0.3m m³ 443 R R GEOTEXTILE Geofrabric wrapping (A5 Biddim or Similar Approved) m² R R SUB-TOTAL: HIGH INTENSITY ENERGY DISSIPATION STRUCTURES (Carried to Summary) R

4 STILLING BASINS AND WASTE ROCK EMBANKMENT SECTION 03 - STILLING BASINS AND WASTE ROCK EMBANKMENT 2.1 SABS 1200C SITE CLEARANCE Clear and Grub m R R SABS 1200DA EARTHWORKS (SMALL WORKS) a) Remove Topsoil to a norminal depth of 300mm, stockpile and maintain or dispose as directed; b) Excavate in all material and place in berm located along downstream side, stockpile and backfill or dispose for; m R R m R R c) Extra-over items for : ) Intermediate excavation m³ R R ) Hard rock excavation m³ 190 R R mm high Waste Rock Berm Complete. Borrow from stockpile by others ("clean" waste rock from mining operations). Rate covers only for placing of waste rock. Waste Rock is free in stockpile. m³ R R d) Extra-over items hauling borrow material to site (Assumed Haulage Distance = 3.5km) free haul = 1km 2.3 SANS GABIONS AND PITCHING 1200 DK SURFACE PREPARATION Surface preparation for bedding of gabions/mattresses. m 3.km R 8.00 R m² R R GEOTEXTILE Geofrabric wrapping (A5 Biddim or Similar Approved) m² R R SECTION 2B: SUBSOIL DRAINAGE 2.4 SABS EARTHWORKS (PIPE TRENCHES) 1200DB Excavation a) Excavate in all materials for trenches, select material, backfill, compact and dispose of surplus material, for pipe sizes: up to160mm dia: for total trench depths: Exceeding but not exceeding.01) 0.0 m 1.0 m m³ 100 R R ) 1.0 m 2.0 m m³ 100 R R b) Extra-over items 8.3.2(a) for : Intermediate excavation m³ 100 R R Hard rock excavation m³ 100 R R c) Excavate and dispose of unsuitable material from trench bottom m³ 100 R R SABS 1200LB PROVISION OF BEDDING PS LB Subsoil drainage in trenches complete as per the drawings a) 110mm diameter HDPE Perforated Drainage Pipe m R R (Wastex or similiar approved) a) 160mm diameter HDPE Perforated Drainage Pipe (Wastex or similiar approved) m R R SUB-TOTAL: STILLING BASINS & WASTE ROCK BERM (Carried to Summary) R

5 NEW STORMWATER MANAGEMENT INFRASTRUCTURE DESCRIPTION AMOUNT (RAND) SECTION 01 - "CLEAN" WATER DRAINS R SECTION 02 - HIGH INTENSITY ENERGY DISSIPERSION STRUCTURES ALONG DRAIN ALIGNMENTS R SECTION 03 - STILLING BASINS AND WASTE ROCK EMBANKMENT R Sub Total (A) R ADD Contingencies (20% of A) R Sub Total (B) R ADD P&G's (20% of A) R TOTAL R