2020-05-28_HYDROLOGY - M2001005

• Permit No: M2001005
• IBM Index Class Name: Hydrology
• Doc Date: 5/28/2020
• Doc Name: Substitute Water Supply Plan
• From: DWR
• To: Bishop-Brogden Associates, Inc.
• Email Name: TC1
• Media Type: D
• Archive: No

Table 3
Castle Concrete Aggregates-Grisenti Pit
2-Year Projected Replacement operations
(all values in acre-feet)
Total Lagged HCU Credit& Projected Lagged HCU Remaining Reservoir
Mining Return Flow Credits Delivered Replacement Excess Delivery
Depletion obligation to the River Requirements Credits Requirements
Month 1 2 3 5
Apr-20 30.11 13.91 7.83 22.28 0.00 22.28
May-20 42.46 40.06 27.88 14.58 0.00 14.58
Jun-20 53.15 42.12 39.81 13.34 0.00 13.34
Jul-20 56.26 47.67 45.14 11.12 0.00 11.12
Aug-20 47.67 33.03 39.13 8.55 0.00 8.55
Sep-20 36.59 24.58 29.06 7.53 0.00 7.53
Oct-20 28.36 20.22 22.58 5.77 0.00 5.77
Nov-20 19.18 -7.61 9.07 17.72 0.00 17.72
Dec-20 15.39 -4.43 1.09 18.73 0.00 18.73
Jan-21 13.09 -3.40 0.00 16.49 0.00 16.49
Feb-21 11.09 -2.57 0.00 13.66 0.00 13.66
Mar-21 14.37 -2.47 0.00 16.84 0.00 16.84
20-21 Total 367.73 201.12 221.60 166.61 0.00 166.61
Apr-21 19.53 13.91 7.83 11.70 0.00 11.70
May-21 28.27 40.06 27.88 0.39 0.00 0.39
Jun-21 35.74 42.12 39.81 0.00 4.07 0.00
Jul-21 31.22 47.67 45.14 0.00 13.92 0.00
Aug-21 26.72 33.03 39.13 0.00 12.41 0.00
Sep-21 23.01 24.58 29.06 0.00 6.05 0.00
Oct-21 18.06 20.22 22.58 0.00 4.52 0.00
Nov-21 9.24 -7.61 9.07 7.78 0.00 7.78
Dec-21 5.22 -4.43 1.09 8.55 0.00 8.55
Jan-22 4.74 -3.40 0.00 8.14 0.00 8.14
Feb-22 5.32 -2.57 0.00 7.89 0.00 7.89
Mar-22 7.28 -2.47 0.00 9.75 0.00 9.75
21-22 Total 214.34 201.12 221.60 54.20 40.98 54.20
Notes
[1] Total lagged mining depletions from Table 1,column[13].
[2] HCU credits from Table 2,columns[12]and[13]. Negative values represent return flow obligation.
[3] HCU credits are diverted through the Lester-Attebury Ditch to the Phase 1 pond where the water is recharged back to the river.
Lagged HCU credits delivered to the River were projected based on lagging factors described in the 2020 SWSP.
[4] Remaining replacement requirements calculated as follows-If[2]<0,equal to maximum of([1]-[2]-[3])and zero.If[2]>0,equal to maximum of
([1]-[3])and zero.
[5] Excess credits calcualted as follows-If[4]>0,then 0,else[3]-[1].
[6] Reservoir release may be occur from Twin Lakes or from Pueblo Reservoir via administrative exchange.
Twin Lakes releases will be assessed 10.3%transit loss based upon a loss of 0.07%per mile over 147.8 miles.
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Printed On:4/16/2020 PJB