2015-08-25_HYDROLOGY - M1987038

• Permit No: M1987038
• IBM Index Class Name: HYDROLOGY
• Doc Date: 8/25/2015
• Doc Name: Substitute Water Supply Plan
• From: DWR
• To: Wright Water Engineers, Inc
• Email Name: LJW
• Media Type: D
• Archive: No

Table 2
Four Corners Materials - Bayfield Gravel Operation
Water Depletions for Years Seven and Eight
Month
Evaporation from
Exposed Ground
Water
Depletions from Dust
Suppression
Depletions from
Material Mined Below
Groundwater Table Concrete
Depletions from
Batch Plant
Depletions for
Existing and
Expanded
Operations
(acre feet)
(acre feet)
(acre feet)
(acre feet)
(acre feet)
1
2
3
4
5
Jan
0.00
0.00
0.29
0.27
0.57
Feb
1.85
0.00
0.29
0.25
2.39
Mar
5.83
0.00
0.29
0.27
6.40
Apr
10.83
0.18
0.29
0.26
11.57
May
15.98
0.19
0.29
0.27
16.74
Jun
21.35
0.18
0.29
0.26
22.09
Jul
19.79
0.00
0.29
0.27
20.35
Aug14.66
0.00
0.29
0.27
15.23
Sep
12.43
0.00
0.29
0.26
12.99
Oct
7.09
0.00
0.29
0.27
7.66
Nov
3.10
0.00
0.29
0.26
3.66
Dec
0.00
0.00
0.29
0.27
0.57
Annual
112.90
0.56
3.53
3.22
120.21
Column Notes
(1) From Table 1, Column 7.
(2) Based on 2,000 gallons per day, three months per year. The distribution through the year may vary from the months shown and will be addressed
in the accounting.
(3) Equals 120,000 tons of gravel removed below groundwater table per year. Up to 120,000 tons amount may also be washed, which does not
accrue any additional depletion. Depletions are determined using the following formula:
(10,000 tons per month) x 4% x (2,000 lbs. / ton) / (62.5 lbs. / ft') / (43,560 ft' / AF).
(4) Equals 35,000 yd3/yr x 30 gal/yd 3/325,851 gal/AF. Distributed evenly through year.
(5) Sum of Columns 1 through 4.
P:\031-007\100 - Pine River\Bayfield Facility\SWSP\SWSP Renewal 2015\
Bayfield Pit SWSP 2015 Tables and Appx Wright Water Engineers, Inc. Des by: RKH
Table 2 Depletions March 2015 Ckd by: PRF