2010-06-04_HYDROLOGY - M1985218

• Permit No: M1985218
• IBM Index Class Name: HYDROLOGY
• Doc Date: 6/4/2010
• Doc Name: Substitute Water Supply Plan
• From: OSE
• To: Applegate Group, Inc.
• Permit Index Doc Type: Hydrology Report
• Email Name: BMK
• Media Type: D
• Archive: No

Table No. 2
Lafarge West, Inc.
Rich Pit, M-85-218
Applegate
Group, ina.
Substitute Water Supply Plan - Evaporative Losses from the Freshwater Pond at the Old Aggregate Sales Area

Month Percent of
Annual
Evaporation
A Gross Lake
Evaporation
(ft)
B
Precipitation
(in)
C Effective
Precipitation
(ft)
D Net Lake
Evaporation
(acre-ft/acre)
E Total Lake
Evaporation
(ac-ft)
F Steady State Lagged
Depletions
(ac-ft)
G
Apr 9.0% 0.38 1.23 0.07 0.30 0.15 0.11
May 12.0% 0.50 1.48 0.09 0.41 0.21 0.13
June 14.5% 0.60 1.37 0.08 0.52 0.26 0.15
July 15.0% 0.63 1.92 0.11 0.51 0.26 0.17
Aug 13.5% 0.56 2.09 0.12 0.44 0.22 0.18
Sept 10.0% 0.42 0.84 0.05 0.37 0.18 0.18
Oct 7.0% 0.29 0.74 0.04 0.25 0.12 0.17
Nov 4.0% 0.17 0.52 0.03 .0.14 0.07 0.16
Dec 3.0% 0.13 0.34 0.02 0.10 0.05 0.14
Jan 3.0% 0.13 0.32 0.02 0.11 0.05 0.12
Feb 3.5% 0.15 0.30 0.02 0.13 0.06 0.11
Mar 5.5% 0.23 0.85 0.05 0.18 0.09 0.11
Total 100% 4.17 12.00 0.70 3.47 1.73 1.73
Total Exposed Water Surface = 0.5 acre - (0.5 acres for unused wash pond)
Annual Precipitation = 12.00 inches -Estimated using CDSS website
Gross Annual Evaporation = 50 inches - Taken from NOAA Technical Report NWS 33
(A) Percent of annual evaporation from SEO guidelines for elevations < 6,500 feet
(B) Gross lake evaporation, (B) = (A)' [gross annual evaporation/12]
(C) Annual total from CDSS, monthly distribution estimated using precipitation data from Colorado Climate Center website for Pueblo, CO Weather Station
(D) Effective precipitation, (D) = [(C)/12]' 70%
(E) Net lake evaporation, (E) = (B) - (D)
(F) Total lake evaporation, (F) = (E)' exposed surface area
(G) Lagged evaporative depletions from Appendix B
NA 0105 LefaW SWSP5%SWSPsVUkanseelSupply Demand-Rich P9- WY 200912.15.09.adsx
2/12/2010