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 5
Castle Aggregates-Pueblo East Pit
Projected Depletions,Credits,and Releases(June 2020-May 2022)
(all values in acre-feet)
Replacement Replacement Replacement by Backup Water Net
Net Projected Replacement by Delivery by Delivery Release Required Effect
Unlagged Lagged by Hamp-Bell Under PBWW Under PBWW Delivery Under From Twin Lakes to the
Depletion Depletion Ditch Credits Annual Lease One-Time Lease CWPDA Lease Reservoir River
Month [1] [2] [3] [4] [5] [6] [7] [8]
Jun-20 1 l 5.9 l 91.71 0.00 6.07 0.000 85.65 0.00 0.00
Jul-20 36.13 49.86 0.00 0.00 34.60 15.26 0.00 0.00
Aug-20 30.72 36.35 0.00 0.00 36.35 0.00 0.00 0.00
Sep-20 25.96 29.05 0.00 0.00 29.05 0.00 0.00 0.00
Oct-20 17.86 22.66 0.00 22.66 0.00 0.00 0.00 0.00
Nov-20 1 l.47 15.99 0.00 15.99 0.00 0.00 0.00 0.00
Dec-20 8.70 11.33 0.00 11.33 0.00 0.00 0.00 0.00
Jan-21 8.70 9.3 8 0.00 9.38 0.00 0.00 0.00 0.00
Feb-21 10.90 9.97 0.00 9.97 0.00 0.00 0.00 0.00
Mar-21 14.47 12.43 0.00 12.43 0.00 0.00 0.00 0.00
Apr-21 21.90 17.65 5.00 12.65 0.00 0.00 0.00 0.00
Ma -21 29.36 24.50 5.00 19.50 0.00 0.00 0.00 0.00
Jun-21 36.11 31.45 0.00 6.07 25.39 0.00 0.00 0.00
Jul-21 36.13 34.81 0.00 0.00 34.81 0.00 0.00 0.00
Aug-21 30.72 33.03 0.00 0.00 33.03 0.00 0.00 0.00
Sep-21 25.96 29.05 0.00 0.00 29.05 0.00 0.00 0.00
Oct-21 17.86 22.66 0.00 22.66 0.00 0.00 0.00 0.00
Nov-21 11.47 15.99 0.00 15.99 0.00 0.00 0.00 0.00
Dec-21 8.70 11.33 0.00 11.33 0.00 0.00 0.00 0.00
Jan-22 8.70 9.38 0.00 9.38 0.00 0.00 0.00 0.00
Feb-22 10.90 9.97 0.00 9.97 0.00 0.00 0.00 0.00
Mar-22 14.47 12.43 0.00 12.43 0.00 0.00 0.00 0.00
Apr-22 21.90 17.65 5.00 12.65 0.00 0.00 0.00 0.00
Ma -22 29.36 24.50 5.00 19.50 0.00 0.00 0.00 0.00
2020-2021 Total 332.07 330.91 10.00 120.00 100.00 100.91 0.00 0.00
2021-2022 Total 252.27 252.27 10.00 120.00 122.27 0.00 0.00 0.00
Notes:
[1]Net unlagged depletion from first-fill of Phase 7,evaporation,and dust control at East Pit,equal to Col[13]in Table 4.
[2] Projected lagged depletion,calculated using methodology described in the 2020 SWSP.
[3] Hamp-Bell Ditch credits available to Castle Aggregates and provided by PBWW.PBWW has the right to store the Hamp-Bell Ditch credits,therefore Castle Aggregates no longer has to replace
the winter time return flow obligation and is only entitled to the net excess credit after full augmentation of Chain of Lake depletions(determined per Case No.03CW8)and replacement of
winter time delayed return flows.Actual timing of delivery may differ from what is specified in table.
[4] Replacement requirement met by storage delivery under 10-year PBWW lease(limited to 120 ac-ft/year from Oct-Sep).Subject to transit loss,as determined by the DWR.Actual
[5] Replacement requirement met by storage delivery under one-time PBWW lease. Subject to transit loss,as determined by the DWR.Actual delivery may vary from projected releases shown in
this table.
[6] Replacement requirement met by delivery of replacement water from CWPDA. May be subject to transit loss,as determined by the DWR.Actual delivery may vary from projected releases
shown in this table.
[7] Backup water release required from Twin Lakes Reservoir equals the remaining replacement requirements that are not met by Hamp-Bell Ditch credits and leased water from PBWW and
CWPDA.Transit losses are included and estimated to be the same as from Clear Creek Reservoir.No Twin Lakes Reservoir water is projected to be required for this SWSP.
[8]Net effect to the river is a balance of projected lagged depletions and replacement sources,equal to[2]subtracted from the sum of[3],[4],[5],and[6].
- 5/13/2020 1:18 PM PJB
a.