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~ e e e Attachment #4 3rd Draft Scope of Work for Consulting Services for the Roaring Fork MuIti- Objective Study A. Stream Instability 1) Methodology and criteria for defining stream stability problems Develop a methodology for determining when a stream reach is suffering "stability problems" (including scientific criteria and criteria related to the effects on people and their communities). Review existing approaches for making such determinations and adapt/supplement them as appropriate for the Roaring Fork valley. 2) Identify areas of stream instability Using methodology developed, identifY areas of instability on a map/maps and provide descriptions of each area. Focus on the Roaring Fork mainstem, the Frying Pan River and any confluences of tributaries with the Roaring Fork mainstem. 3) Determine causes of stream instability for each identified area Determine geologic, hydrologic, land use and other man-induced causes for the specific symptoms of stream instability at each location. Describe the causes in sufficient detail to suggest possible mitigation strategies to reduce stream instability. B. Examine Other River Issues 1) Identify areas of high risk due to flood hazard IdentifY locations on the Roaring Fork mainstem, the Frying Pan River and at confluences of tributaries with the Roaring Fork mainstem where flood hazards are great. Identification will be based on physical flood conditions and on existing and proposed human activity andfacilities in the I DO-year and the 500- year floodplain. Develop a map of these locations and provide text descriptions of each location. 2) Habitat and recreation concerns Develop an assessment of habitat value (fish, wildlife, riparian vegetation) for all reaches of the Roaring Fork mainstem and the Frying Pan River. Develop an assessment of recreational potential for the same stream reaches. IdentifY public access needs, opportunities and constraints for the same stream reaches.