Summary of Rock Armour Cost for Option A , B & C

S/No Description Unit Rate Qty Amount

1 Option A - Based on Contract Design (Full

height with rock at 500mm width)

m3 40.00$ 7,480 299,180.00$

2 Option B - Based on Koon's Method

Statement 1:1.5

m3 40.00$ 109,145 4,365,780.00$

3 Option C - Based on RJC revised design of 1:3

and 1:5 slope c/w 4m Rock Bun

m3 40.00$ 244,936 9,797,440.00$

4 Option D - Based on RJC revised design of 1:3

and 1:2 slope c/w 2m Rock Bun 4m height

MPA comment

m3 40.00$ 141,303 5,652,120.00$

Note:

1) Based on RJC's given length and depth via email on 22/9/2015

2) Based on RJC's rock profile proposal via email on 22/9/2015

3) Length furnish by RJC at 4,237m for stretch 'A'

Rock Armour Detailed Calculation

Option A - Based on Contract Design (Full height with rock at 500mm width)

Base on contract provision Depth Width Area Length Volume

0 0.50 0.00 - -

1 0.50 0.50 592 296

2 0.50 1.00 1,244 1,244

3 0.50 1.50 902 1,353

4 0.50 2.00 150 300

5 0.50 2.50 484 1,210

6 0.50 3.00 282 846

7 0.50 3.50 282 987

8 0.50 4.00 222 888

9 0.50 4.50 79 356

7,480 m3

Option A - Based on Contract Design (Full height with rock at 500mm width)

7,480 40.00$ 299,180.00$

Option B - Based on Koon's Method Statement 1:1.5

Based on Koon's Method

Statement 1:1.5

Depth Slope Area Length Volume

0 1.50 0.00 - -

1 1.50 1.50 592 888

2 1.50 6.00 1,244 7,464

3 1.50 13.50 902 12,177

4 1.50 24.00 150 3,600

5 1.50 37.50 484 18,150

6 1.50 54.00 282 15,228

7 1.50 73.50 282 20,727

8 1.50 96.00 222 21,312

9 1.50 121.50 79 9,599

109,145 m3

Option B - Based on Koon's Method Statement 1:1.5

109,145 40.00$ 4,365,780.00$

Option C - Based on RJC revised design of 1:3 and 1:5 slope c/w 4m Rock Bun

Range Depth Length

0.50 28.00 4.00 1499.00 83,944

0.50 20.00 4.00 1499.00 59,960

0.50 18.00 2.00 1244.00 22,392

0.50 14.00 2.00 1244.00 17,416

0.50 23.00 3.00 902.00 31,119

0.50 17.00 3.00 902.00 23,001

0.50 13.00 1.00 592.00 3,848

0.50 11.00 1.00 592.00 3,256

244,936 m3

Option C - Based on RJC revised design of 1:3 and 1:5 slope c/w 4m Rock Bun

244,936 40.00$ 9,797,440.00$

1m

Based on RJC revised

design of 1:3 and 1:5 slope

c/w 4m Rock Bun

Area

4m-9m

2m

3m

Option D - Based on RJC revised design of 1:3 and 1:2 slope c/w 2m Rock Bun 4m height MPA comment

Range Depth Length

0.50 12.00 4.00 1499.00 35,976

0.50 16.00 4.00 1499.00 47,968

0.50 10.00 2.00 1244.00 12,440

0.50 8.00 2.00 1244.00 9,952

0.50 13.00 3.00 902.00 17,589

0.50 10.00 3.00 902.00 13,530

0.50 7.00 1.00 592.00 2,072

0.50 6.00 1.00 592.00 1,776

141,303 m3

Option D - Based on RJC revised design of 1:3 and 1:2 slope c/w 2m Rock Bun 4m height MPA comment

141,303 40.00$ 5,652,120.00$

1m

Area

Based on RJC revised

design of 1:3 and 1:2 slope

c/w 2m Rock Bun

4m-9m

2m

3m