2023-01-04_PERMIT FILE - M2022013 (16)

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Page 14 6.4.7 EXHIBIT G - Water Information 7Included as an addendum is the Headwaters Corporation report (July 2019) for what is generally referred to as the Westervelt project which was a stream and floodplain restoration project downstream and adjacent to the Two Rivers project at the confluence of the South Platte and Big Thomson rivers. As described in Exhibit I-J, approximately 200,000± cu.yd. of material excavated in the execution of this project was stockpiled in a 28f acre area comprising most of the North- East section of the Central Field. The Headwaters report discusses the excavation and placement of this material and expected hydrological impacts. 8A groundwater monitoring plan has been prepared for the Two Rivers project and is attached as an addendum to this Exhibit G. (3) The three components of the project water requirements are water removed for dust control, water removed with the product, and evaporation from exposed ground water. Dust will be controlled using truck sprinklers, and the estimated frequency is one to ten loads per day depending upon field conditions. Dust will be controlled using truck sprinklers, and the estimated frequency varies daily according to seasonal influences of rain, snow, freezing, and temperatures (Refer to Seasonal Temperatures and Precipitation. At 3,000 gallons of truck capacity, the annual demand is 10.6 acre-feet. (Refer to following Chart (days of hot, freezing, rainy and snowy days derived from; https://www.bestplaces.net/weather/county/colorado/weld): *not 3,000 including gallons per Dust Suppression Sundays& Truck Holidays Month Active Hot Freezing Rainy Snowy #Days #Trucks Total Trucks #gallons total gallons Total Acre Feet Days* Days Days Days Days per day per month per Month per year January 25 0 31 4 3 39 18 1 18 54,000 0.16 February 23 0 27 4 3 34 16 1 16 48,000 0.15 March__________28_____0 ___ 26____ 6 4 ___ 36 17 2 34 102,000 0.31 April 26 0 14 8 2 24 16 3 48 144,000 _._._._._._. ._._._._.-.. ................ 0.44 May 25 1 2 10 0 9 14 5 70 210,000 0.64 June 26 7 0 9 0 2 24 10 240 720,000 2.21 July 25 16 0 7 0 -9 25 10 250 750,000 2.3 August 27 12 0 8 0 -4 27 10 270 810,000 2.48 September 25 4 1 7 0 4 21 5 105 315,000 0.97 October 25 0 ___ 13 ____ 5 1 ___ 19 19 3 57 1711, 00 0.52 November ——.—.—.—.—.-23 0 26 5 3 34 .. 2 30 90.000..........................0.28............... December 25 0 31 4 3 38 18 11 18 54,0001 0.16 3031 401 1711 771 19 2261 2301 1 11561 Annually 1 3,468,0001 10.6 Acre Feet 1040 Trucks Apr-Oct= 3,120,000 90%or 9.6 Acre Feet Adequacy Item 45:Headwaters addendum explanation s Adequacy Item 46 VARRA COMPANIES, INC. TWO RIVERS SAND GRAVEL AND RESERVOIR PROJECT MARCH 2O22 A REGULAR IMPACT[1121 CONSTRUCTION PERMIT APPLICATION—COLORADO DIVISION OF RECLAMATION KING&SAFETY OFFICE OF MINED LAND RECLAMATION