2009-01-09_REPORT - M2007044

• Permit No: M2007044
• IBM Index Class Name: REPORT
• Doc Date: 1/9/2009
• Doc Name: As built site report
• From: Energy Fuels Resources Corp.
• To: DRMS
• Email Name: GRM
• Media Type: D
• Archive: No

• REVISED 100 Yr POND-F Type // 24-hr 100 FULL YEAR Rainfall=2.90"
Prepared by Greg Lewicki & Associates Printed 11/4/2008
HydroCAD® 8.50 s/n 004412 02007 HydroCAD Software Solutions LLC Page 11
Summary for Pond 1P: SEDIMENT POND
Inflow Area = 14.440 ac, 0.00% Impervious, Inflow Depth = 1.98" for 100 FULL YEAR event
Inflow = 30.39 cfs @ 12.00 hrs, Volume= 2.380 of
Outflow = 0.66 cfs @ 18.64 hrs, Volume= 1.894 af, Atten= 98%, Lag= 398.5 min
Primary = 0.66 cfs @ 18.64 hrs, Volume= 1.894 of
Routing by Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.05 hrs
Peak Eiev= 7,027.09'@ 18.64 hrs Surf.Area= 0.000 ac Storage= 1.806 of
Plug-Flow detention time= 1,423.0 min calculated for 1.893 of (80% of inflow)
Center-of-Mass det. time= 1,342.2 min ( 2,156.1 - 814.0 )
Volume Invert Avail.Storage Storage Description
#1 7,022.00' 2.238 of Custom Stage DataListed below
Elevation Inc.Store Cum.Store
(feet) (acre-feet) (acre-feet)
7,022.00 0.000 0.000
7,022.50 0.132 0.132
7,023.00 0.142 0.274
7,024.00 0.312 0.586
7,025.00 0.352 0.938
7,026.00 0.392 1.330
7,027.00 0.433 1.763
7,028.00 0.475 2.238
Device Routing Invert Outlet Devices
#1 Primary 7,023.50' 1.0" Vert. Orifice/Grate X 4.00 columns X 4 rows with 8.0" cc spacing
C= 0.600
Primary OutFlow Max=0.66 cfs @ 18.64 hrs HW=7,027.09' (Free Discharge)
L1=Orifice/Grate (Orifice Controls 0.66 cfs @ 7.60 fps)
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