2010-05-20_HYDROLOGY - M1978052

• Permit No: M1978052
• 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: DB2
• 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 Lae
Evaporation
(ft)
B
Precipitation
(in)
C Effective
Precipitation
(ft)
D Net Lake
Evaporation
(acre-ft/acre)
E Tota La e
Evaporation
(ac-ft)
___L
A r-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-30 7.0% 0.26 1.26 0.07 0.19 1.89
Total 81 3.0 10. 0. .4 24.0
Total Exposed Water Surface = 10.0 acres
Annual Precipitation = 13. Inches - Estimated using the CDSS website'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 precipite
(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
A
Aggregate
Production
(tons)
B WaWi"U""
For Dust
Conh-ni
(ac-ft) : WOkr Use
For
Washing . '
(ac-ft), Tdta
Operational'
. Consurripdve Use
(ac-ft) '
E Total
Evaporative
CU
(ac-ft)
F Tot`dl.
Consumptive
Use
(ac ft)
G nEd
Lagged
Depletions
(ac ft)
H
Apr-10 9.0°h 108 000 3,00: 0.00 .. 3:00 3.38 6:38 < 6.68
May-10 13.0% 156,000 500::• :.-.8.57 -13.57. 4.50 18.07 8.07
Jun-10 16.0% 192,000 5:00 10.13 " 1513 3.84 18.97 10.35 :.
Jul-10 17.0% 204,000 5:78 4.13 9.91 .' ".11.62
Aug-10 15.0% 180,000 5.N" 0.00 5.00 3.48 8.4-8' 10.54
Se 10 9.0% 108,000 5.00 :'10.90-- 15.90 2.80 18.70. 10.42.
Oct-10 7.0% 84,000 5.00: 0.00 5.00, 1.89 6.89 .' 11.76
Total I 8690o 1,032,000 .}'," 6653' 24.0 87. 6
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.
1,1:109100 Lafarge SWSPs'Disciplines (Technical) WRPMTWater RlphtB%SWSPs%Sestt1 Platte Combined12010 AMENDMENT12010 Estimated Combined Renewal CU 04 28 10 Revisions need where shown.ds