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Step 1: Determine current and historical water quality conditions <br />Expected Cost: $2,020 <br />To determine the current and historical water quality conditions in Lake Owasso, Barr proposes to: <br />• Compile and evaluate all available historical water quality monitoring data collected through <br />the Citizen Assisted Monitoring Program (CAMP) and Ramey County Public Works (RCPW) <br />• Conduct An In-Lake Water Quality Data Collection Program for Lake Owasso from May <br />through September, 2007 <br />Historical water quality data collected by the RCPW staff typically includes more rigorous <br />in-lake water quality collection program than CAMP. This information will also be useful in <br />the in-lake modeling part of this project, as it would shed light on the magnitude of any <br />internal phosphorus load the lake may have. <br />Terry Noonan, RCPW, has indicated that they plan to continue in-lake water quality <br />monitoring for Lake Owasso during May through September 2007. Therefore the proposed <br />budget provided excludes costs for in-lake water quality monitoring. RCPW monitoring <br />program includes the following: <br />- Monitoring at the deepest point(s) in Lake Owasso <br />- Chlorophyll a <br />- Conductivity <br />- Temperature <br />- pH <br />- Dissolved Oxygen (D.O.) <br />- Secchi Disc Transparency (S.D.) <br />- Alkalinity <br />- Hardness <br />- Total Phosphorus (TP) <br />- Soluble Reactive Phosphorus (SRP) <br />- Chloride <br />• Conduct trend analyses of phosphorus and chlorophyll a concentrations in Lake Owasso, as <br />well as Secchi Disc measurements, using available historical and 2007 water quality data. <br />• Collect, review and evaluate existing macrophyte data for Lake Owasso, as reported in past <br />surveys from RWMWD, RCPW, and Osgood. <br />• Review and analyze historic zooplankton data to determine if recently observed declines in <br />water transparencies are related to a loss of grazing species that may have previously found <br />refuge from predation. in aquatic plant beds. Dr. Joseph Shapiro, Emeritus Professor of <br />Limnolo~y -University of Minnesota, has agreed to assist Barr Engineering in this activity <br />and to make feasible lake water quality management recommendations that seem to him to be <br />appropriate for inclusion in Barr's Lake Owasso diagnostic-feasibilitystudy (UAA) report <br />Barr Engineering Company 2 <br />::ODMA\PCDOCS\DOC S\247725\ 1 <br />