RECOMMENDED PRESSURES FOR GROUTING

TRADITIONAL UNITS

Depth to Bottom of stage PRESSURES at surface
Average Rock Sound Rock Weak Rock
(feet) (psi) (psi) (psi)
5 5 10 5
10 15 20 5
15 20 35 10
20 25 45 15
25 35 60 20
30 40 70 25
35 45 80 30
40 55 95 30
45 60 105 35
50 65 115 40
55 70 125 45
60 75 140 50
65 85 145 50
70 90 160 55
75 110 170 60
80 105 180 65
85 110 190 70
90 120 200 70
95 125 200 75
100 130 200 80
105 135 200 85
110 145 200 85
115 150 200 90
120 150 200 95
125 150 200 100
130 150 200 105
135 150 200 110
140 150 200 110
145 150 200 115
150 150 200 120
150 150 200 120