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r--~ - - - <br />_ -.i <br />' _~, <br />~ D[s. Sandra Enu•ich • <br />September 10, 1982 <br />Page Two <br />Benthic invertebrate sampling has consisted ~f collecting tv:o <br />El:man dredge samples and ttvo Surber type square foot samples from each <br />stat.ion`:, pool habitat and riffle habitat, respectively, during late <br />July, early August. Where no flowing water is found, lour Ekman dre:d~~e <br />samples are collected from the wettest portion oi' the stream. channe] of <br />that station. Samples are preserved in the field and returned to n <br />lab for enumex•ation and identification. <br />Benthic invertebrate specie<; compos:i.tion and diversity have stayed <br />consistent with what is typical for intermiia ent and turbid slow hater <br />streams, however, they have varied considerably. These trends ~uun•ir to <br />be related more to the _c_ari.abilitt`inherent in temporary streams rather <br />tllan a_llll y!_C11.;.C_eZr1]31J~~~S.LV r•rs_~f f(~i,tc-~~ ~g'j m' i i~ aC tl Vlt}'. ~~11C !'I(1tiL <br />notable observation to be F;ainr.i from reviewing several years' of <br />sampling data is the indication that the henthos population abundance <br />trends are largely dictated by the sc-~a:;onal stream flow conditions and <br />to a lesser degree, temperature. <br />Discussions with John Woodling of 'the CDOIV reveals that the CDOR' <br />feels that the above yearly aquatic monitorinC; program is redundant <br />and unnec.essnry, This is evident from tho CAC:?'s recent rejection of <br />CYCC .fish shocking permit. Furthermore, water quality measures <br />required under Permit 79-177 are considered by CDOIY 'to he more sensitive <br />in detecting cl:auges in aquatic community than the above monitorin;; <br />program. <br />Based on the above conclusions, it is proposed that the aquatic <br />monitoring requirements in Permit 79-177 be modified so that the <br />present aquatic monitoring program be teruli.uated. Iu the future, iC <br />the datat from CYCC's water quality monitorin€; program inclical.es a <br />significant degradation in water quality as defined in Permit 79-177, <br />CYCC tvi.ll re=ume sampling the stream system. <br />Pour quic]c response to this issue would he greatly apprec.iaLcd. <br />If there are any questions, please contact me. <br />Sincerely, <br />COLORADO PAMPA COAL COVPA\'1' <br />/i f~,1 ~ <br />~. <br />Clem Parkin <br />Environmental Coordinator <br />CP : rl~h <br />cc: G. Consalus <br />K. 11'atsou <br />K. Crofts <br />T. Johnson <br />G. Saunders <br />G. Young <br />