Laserfiche WebLink
1 <br />' There appears to be no rare or endangered animal; species residing on the Lo~aan <br />Wash property or immediate environs. Prairir_ ru~~l Peregrin Falcons hava been <br />siyhtcd over the area, but detailed studies have shown neither to he nesting <br />there. <br />Surface water at the Logan Wash site is not used fur domestic or industrial <br />purposes. Springs and streams serve wildlife and cattle. No change in the use <br />of surface water is envisioned. <br />7. Fish and Other Aquatic Life <br />' As mentioned above, springs and streams on *_he Logan Wash sit? serve wildlife <br />and cattle. tdo fish or amphibians have been noted on the Logan 4iash site. <br />' B. Probable Effects of the Proposed Action <br />1. Topography <br />' Neither subsidence rior uplift is expected. Potential changes in surface position <br />over Retort .~4 have been monitored by precise level surveys made before the re- <br />' tort was blasted ar.d front tune to time afterwards v+ith negative results. Precise <br />level surveys will continue to be made over Retort "4 in the sum~~rer of 1973 to <br />check for subsidence or uplift. <br />' Local, artificially-induced seismic shaking effects are anticipated from blasting <br />for conventional mining operations and for creating the in situ retorts. Seismic <br />measurements made c':uring the shot in Room hlo. 4 in August 1975 indicate that <br />' shaking intensities only one-tenth of that generally perceptible by hwnans occurred <br />at Grand Valiey. Readings closer to the blast site ranged from 0.059 at 4100 feet <br />away to 0.49 at 3000 feet away. Plo significant damage, distress, or slope failures, <br />hov+ever, apparently resulted from the ground shaking. <br />The mineral v+aste disposal piles represent a long-term impact that cannot be <br />' avoided. However, the piles are being developed to resemble natural talus and <br />v+ill be vegetated to blend with the surroundings when completed, pursuant to <br />permit from the t•lined Land Reclamation Board. Accordingly, it is deemed not to <br />' be a significant adverse impact. <br />Reclamation plans with respect to all lands affected by Oxy's Logan Wash operations <br />are described in detail in the Reclamation Plan submitted to the Joined Land Re- <br />' clamation Board. <br />2. Industry <br />No industry exists under the Logan Wash site, and no negative impact upon industry <br />is projected (a positive impact for the oil shale industry is expected) as a <br />' result of the proposed action. <br />3. Agriculture <br />No agriculture exists on the Logan Wash site. Cattle grazing may continue during <br />and after the proposed action. <br />-3- <br />1 <br />