2009-08-28_REVISION - M1987049

• Permit No: M1987049
• IBM Index Class Name: REVISION
• Doc Date: 8/28/2009
• Doc Name: Adequacy Review Response- Approved Substitute water supply plan AR02
• From: Hart Environmental
• To: DRMS
• Type & Sequence: AR2
• Media Type: D
• Archive: No

Table 1A
Ready Mixed - Bromley Lakes Pit
SWSP Projected Depletions (August 2009 - July 2010)
all values in acre-feet unless specified)
[1] Surface Area of Exposed Ground Water is 44 ac.
[2] Gross Evaporation Rate equals 42 inches (3.5 feet) per year, based upon NOAA Evaporation Atlas. Monthly distribution based upon SB -120
Guidelines.
[3] Gross Evaporation equals [1] x [2]/12.
[4] Effective Precipitation Rate equals 70% of total precipitation, based upon the Brighton weather station and NOAA Colorado Annual Average
Precipitation 1951-1980 Map.
[5] Effective Precipitation Credit equals [1] x [4]/12.
[6] Net Evaporation equals [3] - [5].
[7] Projected dust control depletion (Dust control water continues to be pumped from Cell 2 during the mining of Erger's Pit).
[8] Total depletions equal [6] + [7].
BBA
H \0430 - BonRBromley\NTP&BL SWSP renewal 69-09.x1, BL
Surface Area
of Exposed
Ground Water
(acres)
Gross Total
Evaporation Gross
Rate Evaporation
(inches)
Effective Effective
Precipitation Precipitation
Rate Credit
(inches)
Net
Evaporation
Dust
Control
Depletion
Total
Depletions
Month
[11
[2] [31
[4] [51
[6]
[71
[8]
Aug
44.0
5.67 20.8
0.6 2.3
18.5
0.2
18.7
Sep
44.0
4.20 15.4
0.6 2.3
13.1
0.2
13.3
Oct
44.0
2.94 10.8
0.4 1.3
9.5
0.1
9.6
Nov
44.0
1.68 6.2
0.4 1.3
4.9
0.1
5.0
Dec '09
44.0
1.26 4.6
0.3 1.0
3.6
0.1
3.7
Jan'10
44.0
1.26 4.6
0.8 3.1
1.5
0.1
1.7
Feb
44.0
1.47 5.4
1.1 4.1
1.3
0.1
1.4
Mar
44.0
2.31 8.5
2.0 7.2
1.3
0.1
1.4
Apr
44.0
3.78 13.9
1.3 4.9
9.0
0.2
9.2
May
44.0
5.04 18.5
0.8 3.1
15.4
0.2
15.6
Jun
44.0
6.09 22.3
1.1 3.9
18.5
0.2
18.7
Jul
44.0
6.30 23.1
0.6 2.3
20.8
0.2
21.0
09-10 Total
-
42.00 154.0
10.0 36.7
117.3
2.0
119.3
[1] Surface Area of Exposed Ground Water is 44 ac.
[2] Gross Evaporation Rate equals 42 inches (3.5 feet) per year, based upon NOAA Evaporation Atlas. Monthly distribution based upon SB -120
Guidelines.
[3] Gross Evaporation equals [1] x [2]/12.
[4] Effective Precipitation Rate equals 70% of total precipitation, based upon the Brighton weather station and NOAA Colorado Annual Average
Precipitation 1951-1980 Map.
[5] Effective Precipitation Credit equals [1] x [4]/12.
[6] Net Evaporation equals [3] - [5].
[7] Projected dust control depletion (Dust control water continues to be pumped from Cell 2 during the mining of Erger's Pit).
[8] Total depletions equal [6] + [7].
BBA
H \0430 - BonRBromley\NTP&BL SWSP renewal 69-09.x1, BL