2022-12-09_PERMIT FILE - M2022001 (2)

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Table 6 Base Model and Modeled Site Groundwater Level Full Buildout Both Sites Full Buddout and Mitigation Difference From Location Baseline All SW Baseline Conditions Patrid a House 47363 47360 -0.33 Cline House 47368 4737.3 0.50 Harding House 4736.6 4737.8 1.25 Wiedeman House 13434 47382 47396 140 Wiedman House 13218 4738.5 47381 -0.40 Sharp House 47384 4738.0 -0.44 HS Land and Cattle 4732.6 4732.1 -0.50 Karbowski Brave House 4725.5 4722.9 -2.55 Schmidt Well 4714.4 4708.9 -5.54 United Well 4712.0 4706.3 -5.69 Owens Well 4714.2 47102 -4.00 Wright House 47174 47111 -6.30 Schmidt House 4718.4 4715.3 -3.10 Smit House 47188 47165 -2.30 Kissler House 4729.5 47294 -0 10 Woolverton House 47308 47307 -0 10 Shimon House 4733.0 47331 010 Kern House 47338 4733.9 0.10 Rainbolt House 47359 47360 008 Gilcrest Valley HS 47370 4736.6 -0 37 6.3.3 Mitigation With Recharge It is not expected that the drop in groundwater head elevations to the north of the site will have a negative impact on the property or well owners in this area because the saturated thickness after full build out of both sites was between eighteen (18)and twenty(22)feet at the approximate well locations. If there is a complaint from the property and/or well owners, a recharge underdrain or recharge pond will be constructed north of the site (see Figure 7). The groundwater from the underdrain and/or wells to the south will be piped from the southern end of the site to the north underdrain or recharge pond to mitigate the drop in groundwater head elevation. The water would drop into a five (5)acre infiltration pond approximately twenty five (25)feet in depth north of Cell 7. The infiltration pond would be completed in native aggregate. Figure 7 depicts the modeled layout for the infiltration pond. The infiltration pond was modeled using the Recharge Module where a recharge zone was set at the approximate location of the recharge pond. The recharge rate was set to 1.45 ft/day which added 562,089 cubic feet per day into the water table and had the following effects on the wells north of the site: Table 7 Recharge Through Infiltration Pond Option Location Baseline With Recharge Change Schmidt Well 47144 4713.4 -1.00 United Well 47120 4714.0 2.00 Owens Well 47142 4712.3 -1.90 Wiedeman Well 47174 47166 -0.80 Groundwater Model Report-Section 20 Gravel Mine Site -12- August 2022