2011-01-04_HYDROLOGY - M1984108

• Permit No: M1984108
• IBM Index Class Name: HYDROLOGY
• Doc Date: 1/4/2011
• Doc Name: Proof of ownership for the 26.4 shares of Uncompahgre Valley Water users Association water
• From: Western Gravel, Inc.
• To: DRMS
• Permit Index Doc Type: Hydrology Report
• Email Name: GRM
• Media Type: D
• Archive: No

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Table 2
Water Depletions During Operation - Years 1 and 2
Western Gravel Inc.
1 2 3 4 5
De letlons
Month Evaporation from Material Removed Dust Water Filling the Total
Exposed and Washed Suppression South Pit Depletions
Groundwater ,
(acre feat) (acrsdaet) (scredest) (sets feet) (acre-feet)
gh A r-10 1.4 0.4 1.9 0.0 3.7
3
4
May-10 2.0 0.4 1.9 0.0 .
Jun-10 2.6 0.4 1.9 0.0 4.8
Jul-10 3.6 0.0 OA 15.4 18.9
Au 10 3.1 0.0 0. 0 15,4 18.4
Se 10 2.3 0.0 0. 0 000 2,3
Oct-10 1.8 0.0 0. 0 0.0 1.6
E Nov-10 0.9 0.0 0. 0 0.0 0.9
Doo-10 0,8 0.0 0. 0 0.0 0,8
Jan-11 0.8 0,0 0. 0 0.0 0.6
Feb-11 0.8 0.0 0. 0 010 0,8
Mor_11 1.2 0,0 0. 0 0.0 1.2
Year 1 Total 20.5 1.2 6. T 30.7 58.2
go A r-11 1,4 0.4 11 9 0,0 3.7
3
4
Me -11 2.0 0.4 1. 8 0.0 .
Jun-11 2.6 0,4 1. 9 0.0 4.8
Jul-11 4.3 0.0 0. 0 22.3 26.8
Au 11 3.8 0,0 0. 0 11.1 14.9
So 11 2,8 0.0 0. 0 11.1 13.9
Oct-11 1.9 0.0 0. 0 0.0 1.9
Nov-11 1.1 0.0 0. 0 0.0 1.1
Dec-11 0.8 0.0 0. 0 0.0 0.8
Jan-12 0.8 0.0 0. 0 0.0 018
Feb-12 0.9 0.0 0 .0 0.0 0.9
2 11 1,5 0.0 0 10 0.0 1.5
Ye ar 2 Total Z-3.1 1 1 4
.2
6
.7 44 8
786
11
Column Notes
(1) Net Evaporation of exposed groundwater (see Table 1A and 18 ). During mining exposed groundwater Includes: trenches, wetland, settlint
pod and north pit (4.96 acres); After mining exposed groundwater Includes the surface area of the South pit and north pit (8,77 acres for year
1 and 8.27 acres for year 2). Evaporation from the north pit has been lagged using a transmissivlty of 30000 gpdgl, distance to river equals
270 feet and distance to no-flow boundary equals 4,100 feet.
(2) Equals 40,000 tone of gravel removed over a throe month period (13,333 tons removed per month) x 4% x (2,000lbs / ton) / (52,6 Ibe / 0)
/ (43,6801131 AF),
(3) Based on 28,000 gallons of water applied 24 days per month over a twee month period.
In two months for year 1 and three
(below the groundwater ever( 89,290 tons for year I and 29,290 for year 2) (estimated pthat the pit fifllsI d
months for year 2).
(6) Sum of Columns (1) through (4)
P:1091-011100MSWSP%R6d DoNWSP-tena"L.Deeember_200ah1 , Inc. Dee. by: EKE
Weetem Greve) both pKe SWSP Tebbe 12.10-09 EKG WrIpM Water EnDecemberalnelnasn Ck by: PRF 2000 .
T-2 Dap (YO)