PERMFILE42896 - Laserfiche WebLink

Home Browse Search

i :, 4- III IIIIIIIIIIIII III 999 ~~ r~ ~~ ~~ ~~ TUTTLE APPLEGATE RINDAHL, INC. Consultants for Land and Resource Development Juiy 19, 198E ~~~~~~ J U L 2 2 1988 Mr. R. A. Ever ist, Jr•. L. G. Ever•ist, Inc. 3555 Youngf ie ld Golden, Colo+•ado 80 ~rN 7. NiINrD LA~1L; f7tCLAPAATION D11115iON RE: Gr••~undwater Investigation for Car•r• pit Weld County, Colorado Dear Rick: Tuttle gpplegate Rindah 1, Inc, has c•~nroleted a st•_~dy of the alluvial gr•oundwat er in the Carr, Colt~r•ad•~ area and evaluated then p~~tentlal impacts the proposed mining operati~~n would have on sur•r•ounding property owners. The n+a~or points that arse addr•essec:f 1n this r•e pert ere (17 will groundwater be exp~~sed by this mining operation, <27 will flows in Lone Tree Creek. be impacted by thEz mining operation, <31 wiil water demands f~~r the proposed operation impact other water right owners in the area, and C47 will the pr•~~posed mining plan create a wet mining oper•at ion that will allow waters from Lone Tree Creek t~r• the gr•oundwat er to bea ponded and create Susses t~~ the hydrologic system. This letter report contains our- t'ind ings and s~appor•t ing data compiled f•~r• thea st udy. Our inf~~rnrat ion is based on three sources of data: 1. Research data and maps found in the U. 5. Geological Su+•vey Li br•ar•y l~~cat ed in Denver, C~~l~~r^ado. 2. Water well information found at the State Engineers Office in Denver, C•~lorad~~. 3. B•~rehole data taken by your firm during the gent echnical investigation of the pr•opused mining site. The proposed mining plan for- this operation calls for rem•~ving and stockpiling approximately 1 to 2 feet of over•bur•den, mining a 6 t~~ 8 foot deep lens of sand end gr^evel, replacing approximately 3 to 6 feet of E/B lnch minus nrater•ial that is unusable and then replacing the prig inel I to c feet of~overburden. The net effect this oper•at ion will have is to lower- the mining area by 3 to E; feet. Based on this plan, anywhere the existing groundwater table is less than I0 feet below the existing ground surface, groundwater would tie exposed during the mining operation. ..no.w r_.,.....~ r~.___~ c...._ .... n_...._._ ... ...~.___ -_ _.