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<br />002244 <br /> <br />.?~ <br /> <br />~ <br /> <br />Schedule: <br />Given Mr. Bethel's 20 hour per week time commitment to the CRDSS Project, it is <br />anticipated that the above work would be performed over the course of the week of March <br />31. <br /> <br />Subtask LR-2c Revisions to Transmountain Diversions in Historic and Calculated Scenarios <br /> <br />Obiective: <br /> <br />It has been observed that demands for transmountain diversions in the historic and <br />calculated scenario may not have been consistently generated or adequately reflect <br />historic operations. Emphasis is on the Continental Hoosier, Moffat and Grand River <br />systems. Changes are necessary to improve the modeling base. <br /> <br />Scope of Work <br />2c.I Assist CWCB staff (Andy Moore) in their review the modeled demands, and modeled output <br />for the transmountain diversions in the historic and calculated Colorado River scenarios in <br />light of historic records of diversions (assumed to be readily available records from the <br />CRDSS database). Recommendation for the Continental Hoosier System may include <br />consideration of changes in modeling of Dillon Reservoir. Generate recommendations for <br />suggested changes to the modeled transmountain demands or associated baseflows to <br />improve the modeling in these scenarios. Summarize the information gained on the demands <br />and the modeling change recommendations in a 5-6 page memo, <br />2c.2 In a 4 hour meeting with CRDSS management and/or CWCB staff, review and finalize <br />changes to be made to the modeled operation of each of the transmountain diversions. <br />2c,3 Modify the model's input data (in the base model data directories on cando) to reflect the <br />agreed on changes to the modeling of the transmountain diversions. It is anticipated that <br />modifications to the statemod program would not be necessary and that changes would be <br />made to the input data files for the historic and calculated scenarios. Rerun both scenarios <br />by first regenerating baseflows. <br />2c.4 In draft form, modifY (redline) existing Phase II documentation to reflect changes in <br />methodology, assumptions and results resulting from this task. This subtask will not involve <br />re-calibration of the model since it is the calculated rather than the historic scenario that is <br />being adjusted, <br />2c.5 After receiving CRDSS/CWCB comments of the draft task documentation, finalize the <br />modifications to the Phase II documentation to present the results of this task. <br /> <br />Deliverables (referencing subtask identifiers): <br />2cl A memo (5-6 pages) that describes the current (Phase II) operation of the <br />transmountain diversions for the historic and calculated scenarios for the Colorado <br />River Basin and recommendations for improvement of the operation of these <br />structures. <br />2c2&2c3 Modified input data sets for the transmountain diversions for the historic and <br />calculated scenarios to reflect the strategy agreed on by CRDSS management. Re- <br /> <br />4 <br />