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(approximately 60 gpm average annual rate),with a range of about 50 to 150 acre-feet(30 to 90 <br /> gpm). <br /> F. Overburden Storage Area: Final reclamation of the OSF areas will include an evapo- <br /> transpirative cap. This is expected to reduce the volume of process water seepage from the <br /> area. A detailed analysis of expected post-reclamation seepage flow has not been performed. <br /> Forthis analysis it is assumed that the seepage flow after final reclamation will be approximately <br /> 50 acre-feet per year, with a range of about 20 to 80 acre-feet (10 to 50 gpm). <br /> G. Robinson Dam: Impacted runoff and seepage from the downstream face of Robinson Dam is <br /> expected to continue for several years after final reclamation of Robinson Reservoir, like Eagle <br /> Park Reservoir. Flow meter records from the Robinson Lake Seepage Pump Station indicate <br /> that the volume of process water from the Robinson Dam area has been about 52 acre-feet per <br /> year over the last 9 years (approximately 30 gpm average annual rate). It is assumed that this <br /> flow volume will not change after final reclamation, although it may eventually be clean water. <br /> The estimated range of impacted flow is about 30 to 80 acre-feet (20 to 50 gpm) from this <br /> source. <br /> H. Total Process Water Volume: The total of all the sources described above is 5,071 acre-feet <br /> (approximately 3,200 gpm average annual rate). Subtracting the future water pool evaporation <br /> (254 acre-feet) results in an estimated annual treatment volume of 4,818 acre-feet per year <br /> (approximately 3,000 gpm average annual rate)afterfinal reclamation is complete. This is about <br /> 52 percent of the current annual water treatment volume. It would be reasonable to use this <br /> volume for future water treatment costs, but the actual volume is expected to vary. Considering <br /> the ranges described about, the total volume is expected to be in the range of 3,720 to 6,570 <br /> acre-feet per year (2,300 to 6,600 gpm). Many factors will impact the annual total each year, <br /> including climate variability and reclamation configuration details. <br /> Exhibit G G-16 May 2024 <br />