2020-09-02_HYDROLOGY - M1986015

• Permit No: M1986015
• IBM Index Class Name: Hydrology
• Doc Date: 9/2/2020
• Doc Name: Substitute Water Supply Plan
• From: DWR
• To: DRMS
• Email Name: JPL
• Media Type: D
• Archive: No

Table 2
Castle Aggregates-Pueblo East Pit Phase 2
Projected Depletion Analysis(June 2020-May 2022)
Surface Area Total Natural Vegetation Credit Net Pond Total Net
of Exposed Gross Gross Effective Effective Phreatophyte Phreatophyte Total Natural Evaporative Unlagged
Ground Water Evaporation Evaporation Precipitation Precipitation CU Reduction Vegetation Depletions Depletion
(ac) Rate(ft) (ac-ft) Rate(ft) Credit(ac-ft) (ft) Credit(ac-ft) Credit(ac-ft) (ac-ft) (ac-ft)
Month [1] [2] [31 [4] [51 [61 [7] [8] [9] [10]
Jun-20 1.0 0.60 0.60 0.08 0.08 - 0.00 0.08 0.52 0.52
Jul-20 1.0 0.63 0.63 0.11 0.11 - 0.00 0.11 0.52 0.52
Aug-20 1.0 0.56 0.56 0.12 0.12 - 0.00 0.12 0.44 0.44
Sep-20 1.0 0.42 0.42 0.05 0.05 - 0.00 0.05 0.37 0.37
Oct-20 1.0 0.29 0.29 0.04 0.04 - 0.00 0.04 0.25 0.25
Nov-20 1.0 0.17 0.17 0.03 0.03 - 0.00 0.03 0.14 0.14
Dec-20 1.0 0.12 0.12 0.02 0.02 - 0.00 0.02 0.10 0.10
Jan-21 1.0 0.12 0.12 0.02 0.02 - 0.00 0.02 0.10 0.10
Feb-21 1.0 0.15 0.15 0.02 0.02 - 0.00 0.02 0.13 0.13
Mar-21 1.0 0.23 0.23 0.05 0.05 - 0.00 0.05 0.18 0.18
Apr-21 1.0 0.3 8 0.3 8 0.07 0.07 - 0.00 0.07 0.31 0.31
May-21 1.0 0.50 0.50 0.08 0.08 - 0.00 0.08 0.42 0.42
Jun-21 1.0 0.60 0.60 0.08 0.08 - 0.00 0.08 0.52 0.52
Jul-21 1.0 0.63 0.63 0.11 0.11 - 0.00 0.11 0.52 0.52
Aug-21 1.0 0.56 0.56 0.12 0.1 1 - 0.00 0.12 0.44 0.44
Sep-21 1.0 0.42 0.42 0.05 0.05 - 0.00 0.05 0.3 7 0.37
Oct-21 1.0 0.29 0.29 0.04 0.04 - 0.00 0.04 0.25 0.25
Nov-21 1.0 0.17 0.17 0.03 0.03 - 0.00 0.03 0.14 0.14
Dec-21 1.0 0.12 0.12 0.02 0.02 - 0.00 0.02 0.10 0.10
Jan-22 1.0 0.12 0.12 0.02 0.02 - 0.00 0.02 0.10 0.10
Feb-22 1.0 0.15 0.15 0.02 0.02 - 0.00 0.02 0.13 0.13
Mar-22 1.0 0.23 0.23 0.05 0.05 - 0.00 0.05 0.18 0.18
Apr-22 1.0 0.3 8 0.3 8 0.07 0.07 - 0.00 0.07 0.31 0.31
May-22 1.0 0.50 0.50 0.08 0.08 - 0.00 0.08 0.42 0.42
2020-2021 Total - 4.17 4.17 0.69 0.69 - 0.00 0.69 3.48 3.48
2021-2022 Total - 4.17 4.17 0.69 0.69 - 0.00 0.69 3.48 3.48
N otes:
[1] Phase 2 maximum anticipated exposed ground water surface area is 1.0 acre.
[2] Gross Evaporation Rate equals 4.17 feet per year,based upon NOAA Evaporation Atlas.Monthly distribution based upon SB-120 Guidelines.
[3] Gross Evaporation equals[1]x[2].
[4] Effective Precipitation Rate equals 70%of total precipitation,based upon NOAA Pueblo Memorial Airport weather station.
[5] Effective Precipitation Credit equals[4]x[1].
[6] Phreatophyte Reduction Credit is not claimed in Phase 2.
[7] Phreatophyte Reduction Credit is not claimed in Phase 2.
[8] Total natural vegetation credit equals[5]+[7].
[9] Net pond evaporation equals[3]-[8].
[10] Phase 2 net unlagged depletion equals net pond evaporation[9].
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