2021-02-24_HYDROLOGY - M1997054

• Permit No: M1997054
• IBM Index Class Name: Hydrology
• Doc Date: 2/24/2021
• Doc Name: Substitute Water Supply Plan
• From: DWR
• To: DRMS
• Email Name: TC1
• Media Type: D
• Archive: No

Table-1
Applegate-
Martin Marietta Materials Group,
Parkdale Project M-97-054
Substitute Supply Plan -Evaporative Losses
(1) (2) (3) (4) (5) (6) (7)
Percent of Exposed Surface Gross Lake Effective Net Lake Total Evaporative
Month Annual Area Evaporation Preciptation Preciptation Evaporation Consumptive Use
Evaporation (ac) (ft) (in) (ft) (acre-ft/acre) (ac-ft)
Oct 7.0% 5.0 0.27 0.80 0.05 0.22 1.11
Nov 4.0% 5.0 0.15 0.50 0.04 0.12 0.59
Dec 3.0% 5.0 0.12 0.49 0.03 0.09 0.43
Jan 3.0% 5.0 0.12 0.41 0.02 0.09 0.45
Feb 3.5% 5.0 0.13 0.50 0.03 0.11 0.53
Mar 5.5% 5.0 0.21 0.85 0.05 0.15 0.80
Apr 9.0% 5.0 0.35 1.40 0.08 0.25 1.32
May 12.0% 5.0 0.45 1.50 0.09 0.37 1.83
Jun 14.5% 5.0 0.55 1.13 0.07 0.49 2.45
Jul 15.0% 5.0 0.58 1.80 0.11 0.47 2.35
LAug 13.5% 5.0 0.52 1.88 0.11 0.41 2.04
Sep 10.0% 5.0 0.38 1.01 0.05 0.32 1.52
Total 100% - 3.83 12.5 0.73 3.11 15.53
Maximum Exposed Water Surface= 5.0 acres -Settling ponds,a gravel washing pond,and dewatering trenches
Annual Precipitation = 12.5 inches -Taken from Western Regional Climate Center
Gross Annual Evaporation = 45 inches -Taken from NOAA Technical Report NWS 33
Notes
(1)Taken from State Engineer's Guidelines for Gravel Pits at elevations below 6500 feet.
(2) Estimate of exposed water surface area for 2018-19
(3)Taken from NOAA Tec hni ca I Report NWS 33 Map 3 and distributed monthly according to Percent of Annual Evaporation(1).
(4) From Western Regional Climate Center Canon City station#51294(1948-2005).
(5) Effective Precipitation equals 70%of Average Annual Precipitation,70%*(4).
(6) Gross Evaporation minus Effective Precipitation converted to units of feet,(3)-(5).
(7)Total Evaporative Loss is the product of Net Evaporation(6)and Exposed Water Surface(2)and%of month Not Frozen