2010-03-05_HYDROLOGY - M1996050

• Permit No: M1996050
• IBM Index Class Name: HYDROLOGY
• Doc Date: 3/5/2010
• Doc Name: Substitute Water Supply Plan
• From: OSE
• To: Mr. Forest Leaf, P.E.
• Permit Index Doc Type: Hydrology Report
• Email Name: ECS
• Media Type: D
• Archive: No

Table 1
Logan Sand and Gravel Mine
Evaporative Losses
Percent of New Water
Annual Gross Average Effective Net Surface
Month Evaporation Evaporation Precipitation Precipitation Evaporation Evaporation for
3.7 acres
(inches) (inches) (inches) (inches) (acre-feet)
[1] [2] [3] [4] [5] [6]
Jan-09 3.0% 1.51 0.33 0.23 1.28 0.40
Feb-09 3.5% 1.76 0.28 0.20 1.57 0.48
Mar-09 5.5% 2.77 0.93 0.65 2.12 0.65
Apr-09 9.0% 4.54 1.26 0.88 3.65 1.13.
May-09 12.0% 6.05 2.60 1.82 4.23 1.30
Jun-09 14.5% 7.31 2.75 1.92 5.38 1.66
Jul-09 15.0% 7.56 2.20 1.54 6.02 1.86
Aug-09 13.5% 6.80 1.87 1.31 5.50 1.70
Sep-09 10.0% 5.04 1.12 0.78 4.26 1.31
Oct-09 7.0% 3.53 0.97 0.68 2.85 0.88
Nov-09 4.0% 2.02 0.54 0.38 1.64 0.51
Dec-09 3.0% 1.51 0.28 0.19 1.32 0.41
Total 100.0% 50.40 15.12 10.58 39.82 12.28

Percent of New Water
Annual Gross Average Effective Net Surface
Month Evaporation Evaporation Precipitation Precipitation Evaporation Evaporation for
3.7 acres
(inches) (inches) (inches) (inches) (acre-feet)
Jan-10 3.0% 1.51 0.33 0.23 1.28 0.40
Feb-10 3.5% 1.76 0.28 0.20 1.57 0.48
Mar-10 5.5% 2.77 0.93 0.65 2.12 0.65
Apr-10 9.0% 4.54 1.26 0.88 3.65 1.13
May-10 12.0% 6.05 2.60 1.82 4.23 1.30
Jun-10 14.5% 7.31 2.75 1.92 5.38 1.66
Jul-10 15.0% 7.56 2.20 1.54 6.02 1.86
Aug-10 13.5% 6.80 1.87 1.31 5.50 1.70
Sep-10 10.0% 5.04 1.12 0.78 4.26 1.31
Oct-10 7.0% 3.53 0.97 0.68 2.85 0.88
Nov-10 4.0% 2.02 0.54 0.38 1.64 0.51
Dec-10 3.0% 1.51 0.28 0.19 1.32 0.41
Total 100.0% 50.40 15.12 10.58 39.82 12.28
Notes:
[1] From SB 120, the evaporation percentages are for gravel pits with elevations below 6,500 feet.
[2] From Logan Well Users Decree 03CW195 - Gross Evaporation 72 inches
[3] From Sterling Weather Station - average 1969 - 2007
[4] Equals Column [3] x 0.70. 70 percent value from SB 120.
[5] Equals Column [2] - Column [4]. If value is less than zero than zero, zero is substituted.
[6] Equals Column [5]/12 x # acres.
Reese
12/8/2009 Logan Sand Gravel 09-10 SWSP Reese 09 SWSP v2 09 12 004.xis