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Mr. Dustin Czapla 12
<br /> CDRMS
<br /> September 24, 2021
<br /> Division of Water Resources-Depletion Analysis Example
<br /> "Evaporation: Gross evaporation (free water surface) shall be calculated based upon
<br /> evaporation atlases in NOAA Technical Report NWS 33 or more site-specific information if
<br /> available. Any other estimate should be within 10% of the NOAA estimate. Any credits to offset
<br /> gross evaporation must be pursuant to state statutes and state engineering policy. The total
<br /> gross evaporation estimate from NOAA 33 shall be distributed to all months. The monthly
<br /> distribution for elevations below 6500 feet msl is: Jan-3.0%, Feb-3.5%, Mar-5.5%, Apr-9.0%,
<br /> May-12.0%, Jun-14.5%, Jul-15.0%, Aug-13.5%, Sep-10.0%, Oct-7.0% Nov-4.0% and Dec-
<br /> 3.0%. The monthly distribution for elevations above 6500 feet msl is:Jan-1.0%, Feb-3.0%, Mar-
<br /> 6.0%, Apr-9.0%, May-12.5%, Jun-15.5%, Jul-16.0%, Aug-13.0%, Sep-11.0%, Oct-7.5%, Nov-
<br /> 4.0%, and Dec-1.5%.". (Office of the State Engineer-Policy 20034)"
<br /> In accordance with DWR's policy the annual depletion (evaporation plus sublimation) is
<br /> presented in the following table. As an example, if one acre foot is consumed over a year the
<br /> following water deletion in gallons per month is summarized.
<br /> Table 3
<br /> Representative
<br /> TSF Sublimation and Eva orative Characteristics
<br /> Evaporation TSF Surface Areal Consumptive Use
<br /> Sublimation Factor Total Gallons Acre Gallons/Month
<br /> Foot
<br /> 1.00% 325,829 3,258 Jan
<br /> 3.00% 325,829 9,775 Feb
<br /> 5.50% 325,829 19,550 Mar
<br /> 9.00% 325,829 29,325 Apr
<br /> 12.00% 325,829 40,729
<br /> 14.50% 325,829 50,503
<br /> 15.00% 325,829 52,133
<br /> 13.50% 325,829 42,358
<br /> 1 1.00% 325,829 35,841
<br /> 7.50% 325,829 24,437 Oct
<br /> 4.00% 325,829 13,033 Nov
<br /> 1.50% 325,829 4,887 Dec
<br /> 325,829
<br /> 1. Evaporation/Sublimation Water Right Depletion Factors(Office of the State Engineer Policy 2003)
<br /> 2. TSF—maximum storage capacity surface water area gallons in one acre
<br /> 4 October Through April =Average Winter Sublimation
<br /> 20. Rule 6.4.21 EXHIBIT U — Environmental Protection Plan - Geochemical Data and
<br /> Analysis
<br /> Pursuant to Rule 6.4.21 (14) please submit geochemical evaluations of any material
<br /> that will be placed in on-site solution containment systems or facilities, stockpiled,
<br /> or disposed of on the affected land, and that has the potential to cause acid mine
<br /> drainage or to release designated chemicals, or toxic or acid-forming materials.
<br /> Section 37-92-308,C.R.S. follow the guidance provided for in 37-92-308(e.g. 37-92-308(3))
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