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<br />- 2 - <br /> <br />Antecedent Flood Study (Omaha CorDs) <br />. The Study is completed. The Corps will transmit it to the US Bureau of Reclamation for independent <br />technical review (ITR) and it is anticipated that the USBR will complete its review in November. <br />Remaining steps include obtaining Corps Division level approval and D.C. level approval. <br />. The Corps Antecedent Flood Study PowerPoint is appended to the 8-24-05 minutes posted on the CWCB <br />web site at http://cwcb.state.co.us/floodwatch/ChatfieldWeb-Current/reports.htm <br /> <br />Water Quality Analyses - (Tetra Tech) <br />. A summary of the September 29,2005 water quality meeting was passed out and is attached. <br />. There is general consensus to move forward with the proposed plan. The steps involve a metals analysis, <br />then analysis for nutrients in a stepwise approach. If the nutrients analyses determine significant impacts to <br />water quality, then the LAKE2K model will be needed and configured. For E. coli, a model couldn't <br />adequately analyze impacts and it will focus on the beach area. <br />. If LAKE2K is needed this will trigger a request for more funding from water users. <br />. Now that the approach is finalized the group is requesting that Paul Winkle (biologist for Chatfield from <br />the Division of Wildlife) te provide feedback. Joni Nuttle from the Water Quality Control Division <br />requested that they be involved in this project. Her number is (303) 692 3533. <br /> <br />Rare Plant Surveys - (Tetra Tech) <br />During August 2005 Tetra Tech conducted a field survey for the threatened Colorado Butterfly Plant and <br />Ute Ladies' -Tresses Orchid. As in previous years, there was no sign of these plants. The study was funded <br />to do the field surveys, but additional funds are needed to write up the final report. <br /> <br />EIS Pro2:ress and No Action Alternatiye (Tetra Tech) <br />. Tetra Tech provided the Corps with a draft of the "affected environment" chapter for internal review. <br />. Work is being done on the No Action alternative summary that is based on the water users and CWCB <br />input. <br />. Comments are still missing from Central Colorado WCD and Western Mutual Ditch Company. Tetra Tech <br />will need to obtain those comments as soon as possible. The CWCB will assist in the completion of this <br />task. <br />. Some ofthe comments submitted were fairly detailed and other comments were less detailed. <br />. Tetra Tech will need additional details for the analyses and will be making specific requests for that data in <br />the near future. Contact will be made through the CWCB to water users. <br />. The studied alternatives include 2 distinct pool levels for Chatfield reallocation, plus the No Action <br />Alternative. The 2 pool levels are: 20,600 AF and 7,700 AF. The 2,900 AF alternative has been dropped <br />based on a joint decision by the group. A third alternative between 20,600 AF and 7,700 AF may still be <br />looked at if needed. <br />. Tetra Tech will also complete a write up about the needs that are met and operational characteristics under <br />the 7,700 AF storage scenario ("1" deleted). There may be sensitivity levels at the reservoir from the <br />biological and recreational standpoint. <br />. Tetra Tech is using SWSI to guide the South Platte overview and the CWCB perspective. <br />. Kent Wiley asked that Tetra Tech try and keep track of the cumulative effects from each target storage pool <br />elevation. <br />. Mr. Wiley also had the idea, discussed previously, that "dredging" in certain parts of the reservoir would <br />yield more storage space and reduce the impacts from rising and falling water levels at the more sensitive <br />and shallow end of the Reservoir. The cumulative effects analysis is a separate section in the report that <br />will also look at other South Platte River projects planned or on-going. Dredging is not an alternative that is <br />currently within the Tetra Tech contract. <br />. Ann Bonnell would like to see a good conservation analysis performed to assess the recent trend in drought <br />measures caused by rising costs of water supply. This analysis could be compared to what we will get from <br /> <br />Flood Protection. Water Project Planning and Finance. Stream and Lake Protection <br />Water Supply Protection. Conservation Planning <br />