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CONTENTS <br />Local or State Policies, Plans, or Actions ....................................................... ............................... <br />22 <br />Alternatives.................................................................................................................... .............................25 <br />Alternative A: Reinstate PWC Use under a Special Regulation as Previously Managed ................... <br />25 <br />Alternative B: REinstate PWC Use Under a Special Regulation with Additional Management <br />Prescriptions (Preferred Alternative) ..................................................................... ............................... <br />27 <br />No- Action Alternative: Allow No PWC Use .......................................................... .............................27 <br />The Environmentally Preferred Alternative ............................................................ .............................28 <br />AffectedEnvironment .................................................................................................. ............................... <br />51 <br />Water Quality ....... ............................... <br />.................................................................. ............................... <br />51 1 <br />Physical Characteristics of Blue Mesa Reservoir ........................................... ............................... <br />51 <br />Colorado Water Quality Standards ................................................................. ............................... <br />52 - <br />WaterQuality Data ......................................................................................... ............................... <br />53 <br />Motorized Watercraft and Water Quality ....................................................... ............................... <br />53 <br />AirQuality ............................................................................................................. ............................... <br />53 <br />Soundscapes.......................................................................................................... ............................... <br />55 <br />Natural and Human Noise Levels ................................................................... ............................... <br />55 <br />Visitor Responses to PWC Noise ................................................................... ............................... <br />57 <br />Wildlifeand Wildlife Habitat .................................................................................. .............................57 <br />General Wildlife Habitat and Vegetation Description ...................................... .............................57 <br />Mammals.......................................................................................................... .............................58 <br />Birds................................................................................................................ ............................... <br />58 <br />Fish.................................................................................................................. ............................... <br />59 <br />Amphibians, Reptiles, and Aquatic Invertebrates ............................................. .............................59 <br />Threatened, Endangered, or Special Concern Species .......................................... ............................... <br />59 <br />WildlifeSpecies ................................................................................................ .............................59 <br />FederalSpecies ............................................................................................... ............................... <br />60 <br />StateListed Species ........................................................................................ ............................... <br />62 <br />ParkSensitive Species ...................................................................................... .............................62 <br />- <br />PlantSpecies ................................................................................................... ............................... <br />63 <br />ShorelineVegetation ............................................................................................. ............................... <br />63 <br />Visitor Use and Experience ..................................................................................... .............................63 <br />AnnualVisitor Use ......................................................................................... ............................... <br />64 <br />MonthlyVisitor Use ....................................................................................... ............................... <br />64 <br />VisitorActivities ............................................................................................. ............................... <br />65 <br />VisitorSatisfaction ........................................................................................... .............................68 <br />Visitor Conflict and Visitor Safety .......................................................................... .............................69 <br />Related Federal and State PWC Regulations .................................................... .............................69 <br />PWC - Related Violations and Conflicts with Other Visitors ........................... ............................... <br />69 <br />CulturalResources ................................................................................................ ............................... <br />70 <br />HistoricalBackground .................................................................................... ............................... <br />70 <br />94 <br />