REP50256

• Permit No: M1996049
• IBM Index Class Name: Report
• Doc Name: SUBSTITUTE SUPPLY PLAN FOR THE L G EVERIST MARYLAND CREEK RANCH AGGREGATE OPERATION M-96-049
• Media Type: D
• Archive: No

TABLE 1B
NET EVAPORATION CALCULATIONS
FOR SECOND YEAR OF OPERATION

Month Monthly
Evaporation
Distribution
(%~~' Gross
Evaporation
(inches)01 Average Year
Precipitation
(inches)ot Effective
Precipitation
(inches)t" Net Unit
Evaporation
(inches)" t Net Unit
Evaporation
(feet) Total
Evaporation
(acre-feet°7
January I.0 0.34 1.06 0.74 0.00 0.00 0.00
February 3.0 I.00 1.08 0.76 0.24 0.02 0.26
March 6.0 2.01 1.31 0.92 I.09 0.09 1.17
Apri! 9.0 3.02 1.35 0.95 2.07 0.17 2.21
May 12.5 4.19 1.40 0.98 3.21 0.27 3.51
June I5.5 5.19 1.I0 0.77 4.42 0.37 4.81
July 16.0 5.36 1.64 1.15 4.21 0.35 4.55
August 13.0 4.36 1.63 1.14 3.22 0.27 3.51
September 11.0 3.68 I.28 0.90 2.78 0.23 2.99
October 7.5 2.51 0.83 0.58 I.93 0.16 2.08
November 4.0 1.34 0.97 0.68 0.66 0.06 0.78
December I.5 0.50 1.10 0.77 0.00 0.00 0.00
Annual 100.0 33.50 14.75 10.34 23.83 1.99 25.87
(l) State Engineer's Ollice distribution above 6500 feet msl (February 28, 1995, Cravel Pit General Criteria for Substitute Supply Plans).
(2) From NOAA Technical Release NWS 33 distributed as per SEO distribution.
(3) From NOAH Annual Climatological Data, Dillon, Colorado (1952-1992).
(4) Equal to 70 percent o(the average year precipitation.
(5) Equal to gross evaporation minus elTective precipitation.
(6) Calculated for 8 surface acres ofexposed groundwater in Mining Cell I and 5 surface acres of exposed groundwater in Mining Cell 2 (i.e. total of 13.0 acres).