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<br /> <br />D02174 <br /> <br />32 <br /> <br />For Water Resources: <br /> <br />I. Monitor concentrations of chemical constituents relative to historical levels, and with <br />respect to identified Colorado River ecosystem requirements, and relative to <br />established EP Alstate and Tribal standards. <br /> <br />2. Monitor water temperature changes throughout the Colorado River ecosystem <br />over time and space with respect to influences of dam operations, specifically with <br />respect to biophysical processes. <br /> <br />For Sediment Resources: <br /> <br />1. Monitor fine-grained sediment deposits, including pre-dam river terraces where <br />cultural resources are known to exist, active sand bars used by recreationists as <br />camping areas, and aquatic habitats related to return-current backwater channels <br />known to support native and non-native fishes. <br /> <br />2. Monitor physical changes in backwater habitats relative to dam operations under the <br />Record of Decision (ROD). <br /> <br />3. Through annual monitoring, define annual changes relative to the character and <br />structure of pre-dam river terraces associated with cultural resources, and all other <br />fine-grained sediment deposits, including camping beaches and backwater habitats <br />found throughout the Colorado River ecosystem relative to those observed <br />immediately following the spring 1996 experimental flood. <br /> <br />4. Define historical (character and structure) pre-dam levels of channel-stored sediment <br />throughout the Colorado River ecosystem relative to those associated with dam <br />operations. <br /> <br />5. Determine baseline conditions of fme-sediment deposits throughout the river <br />ecosystem relative to conditions observed since August 1991, (beginning of interim <br />flows). <br /> <br />Final Draft - (12/15/97) For AMWG Review <br />