Laserfiche WebLink
• This ground rater data presented in Table 7-1, 7-2 erxi 7-3 clearly indicates that the alluvial squifer in <br />the immediate vicinity oP the loeda~t has not historically had axed does not presently haw airy irrigation <br />or liwetoclc rater use potential. <br />Ground Water Flor, PBCharge and Aquifer Chazactarietica. The recharge, diac]:arga aM movement of ground <br />water in the sllwial aquifer ie controlled by 1) the gradient of the rocJc chaxu~el into rhich the alluvium <br />has 6aen deposited, 2) the width of the alluvial deposit, 3) the thiclmeas oP the alluvium, 4) the <br />permeability of the alluvium, 51 the recliazga oz disclarge oP underlying rack strata, grid 6) the Plor <br />charactarietics of the associated stream (DZy Creak). <br />In the region, only wry limited ground water yields haw bean obtnirwd from the Lerie shale. The unit ie <br />predominantly impermeable and acts m a canfirung layer to any underlying eandatane unite. Limited amounts <br />o! rxharge to the Loris shale occur from direct precipitation on portions of the exposed unit and from <br />dischazge from the saturated portion of the alluvium ~ to those portions of the shale in confect with the <br />alluvium. t~charge to the alluvial aquifer occurs prrmnzily in the spring axxi early summer rhea snormelt <br />and surface rater runoff ie ar.~m~..,t ar:d ET ie m ~:. Grourxf rater floc in the alluvial aquifer at the <br />HGT loadout is to the asst exxi sautheeet. <br />Aquifer cS:aracteriatics oP the above rafecanoad fro units can be inferred lrom the lithologic pmpertiee of <br />the fro unite, responses to sampling etroaeaa and aquifer tests oo[~cted upgradient from axxl belor the <br />loadout it the Dry Creek drainage. The shallor Ierie shale ie ralatiwly ~. ~~~la (acts as an aquitard) <br />grid could be expected to haw hydraulic c~^~~^~: vitiee in the range of 10~ to 10~ Pt./day. The alluvial <br />• aquifer has a considerable percentage oP clay and silt size ~-~: cles end the different grain sizes era <br />poorly sorted. During sampling in December, 1991, roll HGDALI rith a saturated bore wlume of Pour galloon <br />ran 6siled dry with the removal of only 4.5 galloru. W11 HGDAL2 had a saturated bore wlume o! 11.2 <br />gallons and ras bailed dry rith the removal oP 22 gallons oP water. M aquifer feet performed at cell <br />HGDAL3 utilizing the Aron-Scott analysis method yielded a t.....~: saivity value o! 280 gpd/ft and a <br />hydraulic coxxLxctivity value oP 6.6 ft/day. Alluvial properties at and immediately belor the loadout <br />exhibit a range of hydraulic cox~~ctrvities rhich is probably a reflection oP grain size grid sorting <br />heterogeruities. Aquifer feet information for roll HGDAL3 ie presented in Attaclment 7-2. <br />• <br />2/(/ - O/ <br />/q Revised 2/98 <br />