Impaired Impairment Waterbody Name Impairment Cause Status1 Parameter Classification pH, Temperature, DO Upstream/Off Seasonal Reservation Sources Total Phosphorus, Klamath River Year Round Highly Threatened Total Nitrogen Hydromodification Seasonal Algae Wet Weather Discharges pH, Temperature, DO Upstream/Off Year Reservation Sources Total Phosphorus, Klamath River Estuary Seasonal Highly Threatened Total Nitrogen Wet Weather Discharges Year Algae Hydromodification Turbidity Silviculture Activities Intermittent Turwar Creek Habitat NPS pollution Intermittent Highly Threatened Suspended Sediment Wet Weather Discharges Seasonal Turbidity Silviculture Activities Intermittent McGarvey Creek Basic Habitat NPS pollution Seasonal Highly Threatened Suspended Sediment Wet Weather Discharges Seasonal Turbidity Silviculture Activities Intermittent Blue Creek Highly Threatened Basic Habitat Wet Weather Discharges Seasonal Wet Weather Discharges Basic Habitat Seasonal Tully Creek NPS Pollution Moderately Threatened Unclassified Roach Creek Basic Habitat Wet Weather Discharges Seasonal Minimally Threatened Tectah Creek Basic Habitat Wet Weather Discharges Intermittent Minimally Threatened Johnson Creek Basic Habitat NPS Pollution Unclassified Minimally Threatened Mettah Creek Basic Habitat NPS Pollution Intermittent Minimally Threatened Pecwan Creek Basic Habitat NPS Pollution Intermittent Minimally Threatened Groundwater None NPS Pollution None Minimally Threatened 1 Status is subject to change based on available data.
Waterbody Name Impaired Parameter Impairment Cause Impairment Classification Status1 Klamath River pH, Temperature, DO Total Phosphorus, Total Nitrogen Algae Upstream/Off Reservation Sources Hydromodification Wet Weather Discharges Seasonal Year Round Seasonal Highly Threatened Klamath River Estuary pH, Temperature, DO Total Phosphorus, Total Nitrogen Algae Upstream/Off Reservation Sources Wet Weather Discharges Hydromodification Year Seasonal Year Highly Threatened Turwar Creek Turbidity Habitat Suspended Sediment Silviculture Activities NPS pollution Wet Weather Discharges Intermittent Intermittent Seasonal Highly Threatened McGarvey Creek Turbidity Basic Habitat Suspended Sediment Silviculture Activities NPS pollution Wet Weather Discharges Intermittent Seasonal Seasonal Highly Threatened Blue Creek Turbidity Basic Habitat Silviculture Activities Wet Weather Discharges Intermittent Seasonal Highly Threatened Tully Creek Basic Habitat Wet Weather Discharges NPS Pollution Seasonal Unclassified Moderately Threatened Roach Creek Basic Habitat Wet Weather Discharges Seasonal Minimally Threatened Tectah Creek Basic Habitat Wet Weather Discharges Intermittent Minimally Threatened Johnson Creek Basic Habitat NPS Pollution Unclassified Minimally Threatened Mettah Creek Basic Habitat NPS Pollution Intermittent Minimally Threatened Pecwan Creek Basic Habitat NPS Pollution Intermittent Minimally Threatened Groundwater None NPS Pollution None Minimally Threatened 1 Status is subject to change based on available data.
YurokNPSAssessmentandPlan_PublicReleaseDraftwithFigures_December2012.docx