Memorandum Agenda Item 11f 05/15/2000

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I • descriptions of alternative strategies for addressing those areas where river condition • is deemed to be unsatisfactory, • a recommended overall plan for addressing sub-reaches of unsatisfactory river condition, and • recommendations for a river monitoring program. GIS maps will provide electronic information in graphic form to support and supplement the reports. The final GIS maps will be housed and maintained at the San Luis Valley GIS/GPS Authority. Rio Grande Compact One important question arose during the scoping process. That question is, "How is the Rio Grande Compact to be addressed as part of this project?" With input from DWR Division Engineer, Steve Vandiver, and from Randy Seaholm, a memo was drafted to answer that question. The memo was provided to all of the consultants. A portion of that memo is provided below: • "What is Given and Beyond Negotiation The index and monitoring stations and the delivery requirements are set by the schedules outlined in the compact. We cannot propose different delivery amounts of water. We cannot propose that the Colorado Division of Water Resources set different curtailments or restrictions on water users in the San Luis Valley. The volume of water that must be left in the river for New Mexico and Texas are not part of the scope of this study. What is Within the Scope of This Study As you saw on last Monday afternoon's field trip, there are locations on the river where there will be problems with erosion, deposition, channel migration and/or overbank flooding if some particular flow threshold is exceeded. We are concerned that some locations may face such problems when requirements of the compact call for flow down the river to exceed such a threshold. We want to learn where, if anywhere, those river locations are and what the problems 3