2010-05-20_HYDROLOGY - M2000016

• Permit No: M2000016
• IBM Index Class Name: HYDROLOGY
• Doc Date: 5/20/2010
• Doc Name: Combined Replacement Plan- Amendment
• From: OSE
• To: Applegate Group, Inc.
• Permit Index Doc Type: Hydrology Report
• Email Name: JLE
• Media Type: D
• Archive: No

Appendix A Amendments are highlighted in green
Lafarge West, Inc.
Riverbend East
Substitute Water Supply Plan - Evaporative Losses

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 Totes Lake
Evaporation
(ac-ft)
F
Apr-10 9.0% 0.34 0.00 0.00 0.34 3.38
May-10 12.0% 0.45 0.00 0.00 0.45 4.50
Jun-10 14.5% 0.54 2.73 0.16 0.38 3.84
Jul-10 15.0% 0.56 2.56 0.15 0.41 4.13
Aug-10 13.5% 0.51 2.71 0.16 0.35 3.48
Se 10 10.0% 0.38 1.63 0.10 0.28 2.80
Oct-10 7.0% 0.26 1.26 0.07 0.19 1.89
Totes 810/o 3.0 10.9 0.6 2.4 24.0
Total Exposed Water Surface = 10.0 acres
Annual Precipitation = 13.0 inches - Estimated using the CDSS webslte's isohyet map
Gross Annual Evaporation = 45 inches -Taken from NOAA Technical Report NWS 33
(A) Taken from General Guidelines for Substitute Water Supply Plans for Sand and Gravel Pits Submitted to The State Engineer
(B) Gross lake evaporation = (A) *(Gross Annual Evaporation / 12)
(C) Annual precipitation estimated using CDSS isohyets. Mean monthly precipitation values based on distribution of the Brighton weather station precipitz
(D) Effective precipitation = 0.7*(C)/12
(E) Net lake evaporation from exposed water surfaces = (B) - (D)
(F) Total lake evaporation from exposed water surfaces = (E) * Total Exposed Water Surface

Month Percent o
Annual
Aggregate
Production
Aggregate
Production
(tons) Water US `
Oorpust
Contml
(ac-ft) Nfa
Fo)
Washing
(ac-ft),,
P 7-()n
Operational'
Consumptive Qset,
(ac ft)
E. Tota
Evaporative
CU
(ac-ft)
F oYa
C8nsump6-
Use
(ac ft) '
G
Lagged
Depletions'
(ac-ft)
H,
Apr-10 9.0% 108,000 3.00. 0.00 _ 3.06 3.38 6.36, 6.68
May-10 13.0% 156,000 5;60.: 8.57 -, 13.5 4.50 18V- c' 8.07
Jun-10 16.0% 192,000 5;01U* 10.13 ` - 15.13 3.84 18.97 1035
Jul-10 17.0% 204,000 5 0178' 5.78 4.13 9.91 .- " ' 1 :62'
Aug-10 15.0% 180,000 5:0D 0.00 5.00 3.48 8.48- 10.54'
Se 10 9.0% 108,000 5. , 10.46 15.90., 2.80 18.70. 16:42, u
Oct-10 7.0°h 84,000 .5.00 _ 0,00 S 0t. 1.89 6.89 11:76
Tote 86% 1,032,000 U7 30.4. 63!! 24.0 { ,• 8,?%: 69_
Total Material Mined = 1 200,000
Moisture Content = 4.0%
(A) Aggregate production percentages
(B) Amount of aggregate production based on percent of annual aggregate production. 2,000,000 tons * Column (A).
(C) Water used for dust control. Monthly amounts where distributed based on estimates from Lafarge
(D) Water Used for washing material. Monthly amounts were distributed based on washing projections from Lafarge, assuming 4% loss
(E) Column (C) + Column (D).
(F) Total lake evaporation from exposed water surfaces = Net Lake Evap * Total Exposed Water Surface
(G) Column (E) + Column (F).
(H) Total lagged mining depletions which reflect existing real time conditions in stream depletion model.
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