2011-09-26_HYDROLOGY - M2002120

• Permit No: M2002120
• IBM Index Class Name: HYDROLOGY
• Doc Date: 9/26/2011
• Doc Name: SWSP
• From: OSE
• To: Civil Resources, LLC
• Permit Index Doc Type: Hydrology Report
• Email Name: ECS
• Media Type: D
• Archive: No

Percent of
Month Annual
Aggregate
Production
Amount of
Aggregate
Production
Water Lost
With Mined
Aggregate
Percent of
Annual
& Concrete
Production
Amount of
Concrete
Production .
1
Water Used
in Concrete
Batching
Water Used
for Dust
Control
Total
Evaporative
& Operational
Losses
(inches)
(inches)
(tons) )
(acre -feeq
(acre -feet)
(cubic yards)
(acre -test)
(acn; -feet)
(acre -feet)
[
V]
[
[
[10]
[11]
(121
[13]
[14]
January
0.0%
0
0.00
0.0%
0
0.00
0.00
0.33
February
0.0%
0
0.00
0.0%
0
0.00
0.00
0.40
March
0.0%
0
0.00
5.5%
550
0.07
0.37
0.96
April
10.4%
0
0.00
9.0%
900
0.11
0.37
1.38
May
14.4%
0
0.00
13.0%
1,300
0.16
0.37
1.65 -
June
17.9%
0
0.00
16.5%
1,650
0.20
0.37
2.22
July
19.4%
0
0.00
18.0%
1,800
0.22
0.37
2.44
August
16.4%
0
0.00
15.0%
1,500
0.18
0.37
2.16
September
12.4%
0
0.00
11.0%
1,100
0.14
0.37
1.63
October
9.4%
0
0.00
8.0%
800
0.10
0.37
1.26
November
0.0%
0
0.00
4.0%
400
0.05
0.37
0.83
December
0.0%
0
0.00
0.0%
0
0.00
0.00
0.31
Total
100.0%
0
0.00
100.0%
10,000
1.23
3.33
15.57
Percent of
Month Annual
Evaporation
Gross
Evaporation
Average
Precipitation
Effective
Precipitation
Net I
Evaporation
i
Net Water Surface
Evaporation for
3.82
(inches)
(inches)
(inches)
(inches) ',
(acre -feet)
[
[
[3]
[
[5] _
[6]
January
3.0%
1.32
0.40
0.28
1.03 '
0.33
February
3.5%
1.53
0.39
0.28
1.26
0.40
March '
5.5%
2.41
1.10
0.77
1,65
0.52
April
9.0%
3.95
1.60
1.12
2.82
0.90
May
12.0%
5.26
2.51
1.76
3.50
1.12
June •
14.5%
6.36
1.68
1.18
5.18
1.65
July
15.0%
6.58
1.11
0.77
5.80
1.85
August
13.5%
5.92
1.24
0.87
5.05
1.61
September
10.0%
4.39
1.24
0.87
3.51
1.12
October
7.0%
3.07
0.85
0.59
2.48
0.79
November
4.0%
1.75
0.68
0.47
1.28
0.41
December
3.0%
1.32
0.47
0.33
0.99
0.31
Total
100.0%
43.86
13.27
9.29
34.57
11.01
T
ble 1
Bernhardt Pit
Evaporative and Operational Losses
Notes:
[1] From SB 120, the evaporation percentages are for gravel pits with elevations below 6,500 feet.
[2] Equals Percent of Annual Evaporation times 29.05 inches.
[3] From Colorado State University's Colorado Climate Center web page, http: / /ecc.atmos.colostate.edu for Longmont Weather SL tion.
[4] Equals Column (3) times 70 percent. 70 percent value was taken from SB 120.
[5] Equals Column (2) minus Column (4). If the resultant value is less than zero then a zero is substituted.
[6] Equals Column (5) divided by 12 times 11.11 acres. Includes Pond 1(4.97 ac), Pond 2 (5.43 ac), Processing pond (040 ac) an dewatering trench (0.31 ac).
[7) Based on information from Hall - Irvin.
[8] Equals Column (7) times 400,000 tons per year. Production based on information from Hall- Irwin. This is production from the 2. acres mining operation.
(9] Equals Column (2) times 2000 times 4% divided by 62.4 divided by 43,560.
[10] Based on information from Hall - Irvin.
[11] Equals Column (10) times 100,000 cy per year. Production based on information from Hall- Irwin.
[12] Equals Column (11) times 40 gallons divided by 325851. Assume a use of 40 gallons per cubic yard of concrete production.
[13] Equals 6000 gallons per day times number of operating days (20 days) in the month divided by 325851, during production mon hs (March thru November).
[14] Equals Column (6) plus Column (9).
BERN_SW S P2011.xIs
MAR 1 1 200
'tVAlfEf RtSOURCES
STATE ENGINEFP
':0' Ci
Civil Resources, LLC, 3/8/2011