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Response to Adequacy Review No. 2 124'" Estates Sand and Gravel Mine, File Number M-2001-085 The applicant states that any discharge into the Fulton Ditch will be in accordance with the Crossings Agreement executed between the Fulton Ditch Company and Dacoa, Inc.. Please be aware that all agreements need to be established between the applicant, which is Adams County RV Park, LLC, dba 124`" Estates Partners. Dacoa, Inc. is neither the applicant nor the permittee, therefore the Division cannot accept any agreements unless they are execute by Adams County RV Park, LLC, dba 124'" Estates Partners. The applicant and the Fulton Ditch Company will execute an addendum to the Crossings Agreement in which both parties recognize the 124'" Estates Partners as a party to the Agreement with the same rights as granted to Dacoa, Inc. by the contract. The applicant revised the seed mixture to include Western Wheatgrass, Sideoats Grama, Needle and Thread, Streambank VVhea!grass and Slender Wheatgrass. Please specifiy the quantity of each species to be planted in LBS PLS/acre. The applicant will use the grass seed mix and the application rates as indicated in the following table. Common Name PLS - Lbs/Acre Percent of Mix Western Wheatgrass 3.6 20 Sideoats Grama 1.5 15 Blue Grama 0.4 15 Needle and Thread 1.7 10 Streambank Wheatgrass 2.5 20 Slender Wheatgrass 2.5 20 Note: The seeding rate represents a drill rate. Broadcast rate would be two times the dril l rate. 3. The applicant acknowledges that shallow wells along 124"' Avenue and the water ski club pond will likely be impacted by dewatering of the mine site. The applicant proposes a mitigation plan to address the impacts to the wells and the pond. Please clarify the following regarding the mitigation plan: The applicant implies the dewatering into the Fulton Citch will recharge the groundwater down gradient of the mine. However, the applicant also states that the Fulton Ditch has likely sealed itself by the settling o(fine solids, which create a lining for the ditch. Please clarify if the Fulton Ditch is lined to allow a recharge to the groundwater system, or lined to prevent seepage through the ditch. No implication that the Fulton Ditch will noticeably recharge groundwater has been intended; and the applicant has no expectation that seepage from the ditch will significantly compensate groundwater in the immediate area of the mine for losses attributable to dewatering activity within the mine. Through many years of use, the ditch has likely sealed itself to some extent through the settling of fine solids.