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 3
Castle Aggregates-Pueblo East Pit Phase 7
Projected Depletion Analysis(June 2020-May 2022)
Surface Area Total Natural Vegetation Credit Net Pond Aggregate Initial Total Net
of Exposed Gross Goss Effective Effective Phreatophyte Phreatophyte Total Natural Evaporative Moisture Fill Llnlagged
Ground Water Evaporation Evaporation Precipitation Precipitation Cu Reduction Vegetation Depletions Content Depletion Depletion Dcplction
(ac) Rate(ft) (ac-ft) Rate(ft) Credit(ac-ft) (ft) Credit(ac-ft) Credit(ac-ft) (ac-ft) (ac-ft) (ac-ft) (ac-ft)
Month [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12]
Jun-20 10.0 0.60 6.00 0.08 0.58 0.60 1.62 2.20 3.80 0.00 79.80 83.60
Jul-20 10.0 0.63 6.30 0.11 0.80 0.63 1.70 2.50 3.80 0.00 0.00 3.80
Aug-20 10.0 0.56 5.60 0.12 0.88 0.56 1.51 2.39 3.21 0.00 0.00 3.21
Sep-20 10.0 0.42 4.20 0.05 0.37 0.42 1.13 1.50 2.70 0.00 0.00 2.70
Oct-20 10.0 0.29 2.90 0.04 0.29 0.29 0.78 1.08 1.83 0.00 0.00 1.83
Nov-20 10.0 0.17 1.70 0.03 0.22 0.04 0.11 0.33 1.37 0.00 0.00 1.37
Dec-20 10.0 0.12 1.20 0.02 0.15 0.00 0.00 0.15 1.05 0.00 0.00 1.05
Jan-21 10.0 0.12 1.20 0.02 0.15 0.00 0.00 0.15 1.05 0.00 0.00 1.05
Feb-21 10.0 0.15 1.50 0.02 0.15 0.00 0.00 0.15 1.35 0.00 0.00 1.35
Mar-21 10.0 0.23 2.30 0.05 0.37 0.08 0.22 0.58 1.72 0.00 0.00 1.72
Apr-21 10.0 0.38 3.80 0.07 0.51 0.38 1.03 1.54 2.26 0.00 0.00 2.26
May-21 10.0 0.50 5.00 0.08 0.58 0.50 1.35 1.93 3.07 0.00 0.00 3.07
Jun-21 10.0 0.60 6.00 0.08 0.58 0.60 1.62 2.20 3.80 0.00 0.00 3.80
Jul-21 10.0 0.63 6.30 0.11 0.80 0.63 1.70 2.50 3.80 0.00 0.00 3.80
Aug-21 10.0 0.56 5.60 0.12 0.88 0.56 1.51 2.39 3.21 0.00 0.00 3.21
Sep-21 10.0 0.42 4.20 0.05 0.37 0.42 1.l 3 1.50 2.70 0.00 0.00 2.70
Oct-21 10.0 0.29 2.90 0.04 0.29 0.29 0.78 1.08 1.83 0.00 0.00 1.83
Nov-21 10.0 0.17 1.70 0.03 0.22 0.04 0.11 0.33 1.37 0.00 0.00 1.37
Dec-21 10.0 0.12 1.20 0.02 0.15 0.00 0.00 0.15 1.05 0.00 0.00 1.05
Jan-22 10.0 0.12 1.20 0.02 0.15 0.00 0.00 0.15 1.05 0.00 0.00 1.05
Feb-22 10.0 0.15 1.50 0.02 0.15 0.00 0.00 0.15 1.35 0.00 0.00 1.35
Mar-22 10.0 0.23 2.30 0.05 0.37 0.08 0.22 0.58 1.72 0.00 0.00 1.72
Apr-22 10.0 0.38 3.80 0.07 0.51 0.38 1.03 1.54 2.26 0.00 0.00 2.26
May-1 2 10.0 0.50 5.00 0.08 0.58 0.50 1.35 1.93 3.07 0.00 0.00 3.07
2020-2021 Total - 4.17 41.70 0.69 5.04 3.50 9.45 14.49 27.21 0.00 79.80 107.01
2021-2022 Total - 4.17 41.70 0.69 5.04 3.50 9.45 14.49 27.21 0.00 0.00 27.21
Notes:
[1]Phase 7 inaximu7n anticipated exposed ground water surfacc area.is 10.0 acres after completion of the first-till of the pit.
[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]-2.7),based upon 2.7 acres of phreatophyte area in Phase 1.
[6]Average monthly potential consumptive use in Blancy-Criddle analyses for Phase 7 based.on a depth to ground water of 4 feet.Values limited on monthly basis to gross evaporation in[2].
[7]Phreatophyte Reduction Credit equals[6]x 2.7 ac,based upon 2.7 acres of 100%canopy cover.
[8]Total natural vegetation credit equals[5]+[7].
[9]Net pond evaporation equals[3]-[8].
[10] Sand.and gravel production will not occur at Phase 7 as the pit has transitioned into reclamtion operations.
[11]Phase 7 net unlagged depletion equals net pond evaporation plus water loss with aggregate removal[9]+[10].
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