2018-10-16_PERMIT FILE - M2018039 (2)

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i E (5) Crourld•..ater; At tht-1 of icrrestic:a�i^'�, frc-e around- ' wat,2r cocountFred at epproiim.otc depths of tv;o (2) to nine (9) f;:et below the surfac.o. Gr ounr&rjter level; in this area are s:"oject to c:h nge clue to Seasonal variations, upon %vat•:r levels in ti-w Cache La Po►dre +'iv,?r, and upon irrigation deriands on the prop='rty, DISCUSSION The granular material encountered on the silo consists of well-rounded river deposited rocks of a hard durable granite nature. It is our opinion that this material is of suitable size, hardness and quality to be Used as a commercial aggregate source. In addition, there is suitable quantity, being well above the maximum 3: 1 ratio of aggregate to overburden to make extraction economicaliy feasible. Based upon our test borings, it is estimated that approximately two hun- dred eighteen (218) acres of commercial quality aggregate could be obtained totaling over five and one-half (5-) million cubic yards. Approximately nine hundred fifty thousand (�,50,000) cubic yards of overburden would have to be removed in order to recover this gravel . However, much of this material is suitable as filler material in the production of base course material. In addition, the topsoil overlying the site has some economical value. Since a majority of the sand and gravel is below groundwater, excavation would liave to be accom- plished by use of a dragiine or the site would have to be dewatered. GENERAL CcXNAENTS This report has been prepared in order to aid in the evaluation of the mineral resources available on the property. This report does not reflect any variations in the soil which may exist between the horings. The nature and extent of these variations between the borings may not become evident until a later date. If variations do appear, it may be necessary to make a re-evaluation of the quantities as discussed above. To aid in this re-evaluation, additional test borings may be necessary.