2012-12-12_HYDROLOGY - M1983176

• Permit No: M1983176
• IBM Index Class Name: HYDROLOGY
• Doc Date: 12/12/2012
• Doc Name: SWSP
• From: OSE
• To: Asphalt Specialties Co.
• Permit Index Doc Type: Hydrology Report
• Email Name: BMK
• Media Type: D
• Archive: No

Table AI.3 - Evaporative Depletions Year 3 (2013)
Month
(1) (2) (3) (4) (5) (6) (7)
Gross Free Free Water Monthly Net
Surface Mean Effective Monthly Net Surface Volumetric
Monthly Fraction of Evaporation Rainfall Precipitation Evaporation Area Evaporation
Evaporation [in] [in.] [in.] [in] [acre] [acre -feet]
January 0.03 44.50 0.43 0.30 1.03 17.59 1.52
February 0.04 44.50 0.37 0.26 1.30 17.14 1.85
March 0.06 44.50 1.17 0.82 1.63 16.68 2.26
April 0.09 44.50 1.76 1.23 2.77 16.23 3.75
May 0.12 44.50 2.30 1.61 3.73 15.77 4.90
June 0.15 44.50 1.67 1.17 5.28 15.32 6.74
July 0.15 44.50 1.56 1.09 5.58 14.86 6.92
August 0.14 44.50 1.75 1.23 4.78 14.41 5.74
September 0.10 44.50 0.99 0.69 3.76 13.96 4.37
October 0.07 44.50 0.89 0.62 2.49 13.50 2.80
November 0.04 44.50 0.78 0.55 1.23 13.05 1.34
December 0.03 44.50 0.52 0.36 0.97 12.59 1.02
Notes
(1) = Monthly fraction of evaporation for elevations below 6500 ft from Guidelines
for Substitute Water Supply Plans.
(2) = Gross free water surface evaporation from NOAA Technical Report NWS 33
(3) = Mean Rainfall - See AI.5
(4) = Effective Rainfall = 70% Mean Rainfall
(5) = Columns (1) x (2) - (4)
(6) = Total free water surface area of pit based on 5 acre /year backfill rate
(7) = Column (5)/12 x Column (6)
43.22