Chatfield Reallocation Change Order Letter and Project Summary Report

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• Reservoir Operational Plan. The water users group provided their operating plan (inflow and release data) to the Corps to run the hydrologic reservoir model. Information was gathered to conduct the impact analysis for the Feasibility Report/EIS. It was later discovered that additional work to the model was necessary to make adjustments in the initial assumptions. Impacts to the adjustments are now being evaluated by State Parks and Tetra Tech. Revisions to the FR/EIS may or may not be needed as a result. • Water Quality. A Water Quality Working Group was established with the objective of assisting in identifying the potential impacts of pool changes on the Chatfield Lake's water quality. The group has reviewed pertinent data, made recommendations for methodology and model to be used for the impact analysis. The recommended methodology was carried out and the draft findings were submitted to appropriate reviewing agencies. Review comments were incorporated and the water quality modeling is essentially completed. • Project Coordination. The CWCB has met with Omaha Corps staff on several occasions to discuss contract and project management issues for the Chatfield Reallocation study. Several key decisions were made regarding the continued efforts and separation of the FR/EIS and the Ecosystem Restoration components of the process. In addition,the Corps has offered and organized a Vertical Team Meeting that will take place in late January 2007 to gain further clarification on key questions related to the study. 4. FUNDING. The following table illustrates the most up-to-date status regarding federal and non-federal project funds allocated as well as estimated funds needed to complete the study. The revised Study Cost is currently estimated to be $3,730,447. The State's share has proportionately increased to $1,865,223, of which$400,223 is for in-kind services. The sponsor has provided $1.1M cash thus far. Table 1 summarizes both the funding allocations for the Chatfield Reallocation Study. Table 1 TASK FEDERAL CWCB CWCB TASK DESCRIPTION COSTS CASH IN-KIND ($) ($) ($) ($) HYDROLOGIC STUDIES Corps Hydrologic study costs- Modeling, 382,750 254,000 128,750 evaluations, reports, document reviews Antecedent Flood Condition Study 156,200 31,200 125,000 Contract Hydrologic Costs- Modeling 115,037 89,384 25,653 (Simon &Assoc) Sub Total HYDRAULIC STUDIES Corps Hydraulic study costs -reports, 225,006 166,190 58,816 document reviews Contract Hydraulic study costs (Simon & 379,202 294,640 84,562 Assoc.)