Limiting Factors



Columbia Gorge Province

Klickitat Subbasin 376, 382

BULL TROUT
Key Limiting Factor Impairment Habitat Affected Threat Type Threat Name Life Stage (s) Description
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Instream Agricultural Practices; Forest Management Riparian Degradation; Wood/Structure Removal Juveniles, adults Decreased channel sinuosity in meadows in White Creek watershed and the mainstem of the Klickitat River has affected spawn timing, incubation, and rearing. Juvenile rearing is affected by lack of large woody debris in the upper and middle portions of the Klickitat Subbasin, including White Creek watershed, Trout Creek watershed, the upper and middle sections of the mainstem of the Klickitat River, and lower portions of the Little Klickitat River
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Riparian Forest Management; Agricultural Practices Riparian Degradation Juveniles, adults Native vegetation has been lost in floodplain areas of the White Creek watershed, mainstem Klickitat River, and lower portions of the Little Klickitat River.
Sediment Conditions Increased Sediment Quantity Freshwater-Instream Forest Management; Agricultural Practices; Urbanization Riparian Degradation; Bank Destabilization; Impervious Surfaces (Road Density) Eggs, adult spawners Increased percentages of fine sediment throughout the entire subbasin impact spawning and incubation.
Water Quality Temperature -- Agricultural Practices; Forest Management Filling; Riparian Degradation; Bank Destabilization All Loss of riparian vegetation, modifications of streambanks, channel instability, decreased channel sinuosity in meadows in White Creek watershed and the mainstem of the Klickitat River have altered thermal regimes and affected spawn timing, incubation, and rearing.
Water Quantity Decreased Water Quantity -- Forest Management; Agricultural Practices Riparian Degradation; Water: Storage or Withdrawal Juveniles, adults Loss of wetland structure and groundwater withdrawals lower base flows
COHO
Key Limiting Factor Impairment Habitat Affected Threat Type Threat Name Life Stage (s) Description
Habitat Quantity and Quality Access and Availability; Morphological Changes Estuary Agricultural Practices; Urbanization Diking; Filling; Riparian Degradation; Wetland Loss Smolts Historical complex habitats have been modified through channelization, diking, development and other practices.
Habitat Quantity and Quality Morphological Changes Freshwater-Floodplain Forest Management; Agricultural Practices; Urbanization Riparian Degradation; Wood/Structure Removal; Impervious Surfaces (Road Density) All Side channels have been isolated in Diamond Fork, and the upper mainstem of the Klickitat River. There has been a loss of wetlands in upper Swale Creek.
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Riparian Forest Management; Agricultural Practices Riparian Degradation Juveniles, adults Native vegetation has been lost in floodplain areas of the White Creek watershed, mainstem Klickitat River, and lower portions of the Little Klickitat River.
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Instream Agricultural Practices; Forest Management Riparian Degradation; Wood/Structure Removal Juveniles, adults Decreased channel sinuosity in meadows in White Creek watershed and the mainstem of the Klickitat River has affected spawn timing, incubation, and rearing. Juvenile rearing is affected by lack of large woody debris in the upper and middle portions of the Klickitat Subbasin, including White Creek watershed, Trout Creek watershed, the upper and middle sections of the mainstem of the Klickitat River, and lower portions of the Little Klickitat River
Instantaneous Mortality Anthropogenic Mortality -- Fishery Management Harvest Adults Coho are subject to both ocean and freshwater harvest.
Instantaneous Mortality Anthropogenic Mortality -- Dam or Hydropower Facility Management Migration Impediments Juveniles Juveniles and adults must pass Bonneville Dam during migration.
Sediment Conditions Increased Sediment Quantity Freshwater-Instream Forest Management; Agricultural Practices; Urbanization Bank Destabilization; Impervious Surfaces (Road Density) Eggs, adult spawners Increased percentages of fine sediment throughout the entire subbasin impact spawning and incubation.
Water Quantity Decreased Water Quantity -- Forest Management; Agricultural Practices Riparian Degradation; Water: Storage or Withdrawal Juveniles, adults Loss of wetland structure and groundwater withdrawals lower base flows
FALL CHINOOK
Key Limiting Factor Impairment Habitat Affected Threat Type Threat Name Life Stage (s) Description
Habitat Quantity and Quality Access and Availability; Morphological Changes Estuary Agricultural Practices; Urbanization Diking; Filling; Riparian Degradation; Wetland Loss Smolts Historical complex habitats have been modified through channelization, diking, development and other practices.
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Instream Agricultural Practices; Forest Management Riparian Degradation; Impervious Surfaces (Road Density) Fry Floodplain roads, both abandoned and active, have led to channelization and constriction problems.
Instantaneous Mortality Anthropogenic Mortality -- Fishery Management Harvest Adults Fall Chinook are subject to both ocean and freshwater harvest.
Instantaneous Mortality Anthropogenic Mortality -- Dam or Hydropower Facility Management Migration Impediments Juveniles Juveniles and adults must pass Bonneville Dam during migration
Sediment Conditions Increased Sediment Quantity Freshwater-Instream Forest Management; Agricultural Practices; Urbanization Bank Destabilization; Impervious Surfaces (Road Density) Eggs, adult spawners Increased percentages of fine sediment throughout the entire subbasin impact spawning and incubation.
Water Quantity Decreased Water Quantity -- Forest Management; Agricultural Practices Riparian Degradation; Water: Storage or Withdrawal Juveniles, adults Loss of wetland structure and groundwater withdrawals lower base flows
SPRING CHINOOK
Key Limiting Factor Impairment Habitat Affected Threat Type Threat Name Life Stage (s) Description
Habitat Quantity and Quality Access and Availability Freshwater-Instream Dam or Hydropower Facility Management Migration Impediments Juveniles, adults A 2,400 ft flume, 2 culverts, and dam in Snyder Creek create a depth/velocity barrier. Poor passage percentage and survival exists at Lyle Falls fish ladder. Access to Dead Canyon is limited due to an undersized road crossing and road bed construction.
Habitat Quantity and Quality Access and Availability; Morphological Changes Estuary Agricultural Practices; Urbanization Diking; Filling; Riparian Degradation; Wetland Loss Smolts Historical complex habitats have been modified through channelization, diking, development and other practices.
Habitat Quantity and Quality Morphological Changes Freshwater-Floodplain Forest Management; Agricultural Practices; Urbanization Riparian Degradation; Wood/Structure Removal; Impervious Surfaces (Road Density) All Side channels have been isolated in Diamond Fork, and the upper mainstem of the Klickitat River. There has been a loss of wetlands in upper Swale Creek.
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Riparian Forest Management; Agricultural Practices Riparian Degradation Juveniles, adults Native vegetation has been lost in floodplain areas of the White Creek watershed, mainstem Klickitat River, and lower portions of the Little Klickitat River.
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Instream Agricultural Practices; Forest Management Riparian Degradation; Wood/Structure Removal Juveniles, adults Decreased channel sinuosity in meadows in White Creek watershed and the mainstem of the Klickitat River has affected spawn timing, incubation, and rearing. Juvenile rearing is affected by lack of large woody debris in the upper and middle portions of the Klickitat Subbasin, including White Creek watershed, Trout Creek watershed, the upper and middle sections of the mainstem of the Klickitat River, and lower portions of the Little Klickitat River
Instantaneous Mortality Anthropogenic Mortality -- Dam or Hydropower Facility Management Migration Impediments Juveniles Juveniles and adults must pass Bonneville Dam during migration.
Sediment Conditions Increased Sediment Quantity Freshwater-Instream Forest Management; Agricultural Practices; Urbanization Bank Destabilization; Impervious Surfaces (Road Density) Eggs, adult spawners Increased percentages of fine sediment throughout the entire subbasin impact spawning and incubation.
Water Quantity Decreased Water Quantity -- Forest Management; Agricultural Practices Riparian Degradation; Water: Storage or Withdrawal Juveniles, adults Loss of wetland structure and groundwater withdrawals lower base flows
STEELHEAD
Key Limiting Factor Impairment Habitat Affected Threat Type Threat Name Life Stage (s) Description
-- Artificial Propogation Juveniles Non-native Skamania stock steelhead may affect fish from the Klickitat population.
Habitat Quantity and Quality Access and Availability Freshwater-Instream Dam or Hydropower Facility Management Migration Impediments Juveniles, adults A 2,400 ft flume, 2 culverts, and dam in Snyder Creek create a depth/velocity barrier. Poor passage percentage and survival exists at Lyle Falls fish ladder. Access to Dead Canyon is limited due to an undersized road crossing and road bed construction.
Habitat Quantity and Quality Access and Availability; Morphological Changes Estuary Agricultural Practices; Urbanization Diking; Filling; Riparian Degradation; Wetland Loss Smolts Historical complex habitats have been modified through channelization, diking, development and other practices.
Habitat Quantity and Quality Morphological Changes Freshwater-Floodplain Forest Management; Agricultural Practices; Urbanization Riparian Degradation; Wood/Structure Removal; Impervious Surfaces (Road Density) All Side channels have been isolated in Diamond Fork, and the upper mainstem of the Klickitat River. There has been a loss of wetlands in upper Swale Creek.
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Riparian Forest Management; Agricultural Practices Riparian Degradation Juveniles, adults Native vegetation has been lost in floodplain areas of the White Creek watershed, mainstem Klickitat River, and lower portions of the Little Klickitat River.
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Instream Agricultural Practices; Forest Management Riparian Degradation; Wood/Structure Removal Juveniles, adults Decreased channel sinuosity in meadows in White Creek watershed and the mainstem of the Klickitat River has affected spawn timing, incubation, and rearing. Juvenile rearing is affected by lack of large woody debris in the upper and middle portions of the Klickitat Subbasin, including White Creek watershed, Trout Creek watershed, the upper and middle sections of the mainstem of the Klickitat River, and lower portions of the Little Klickitat River
Instantaneous Mortality Anthropogenic Mortality -- Dam or Hydropower Facility Management Migration Impediments Juveniles Juveniles and adults must pass Bonneville Dam during migration.
Sediment Conditions Increased Sediment Quantity Freshwater-Instream Forest Management; Agricultural Practices; Urbanization Bank Destabilization; Impervious Surfaces (Road Density) Eggs, adult spawners Increased percentages of fine sediment throughout the entire subbasin impact spawning and incubation.
Water Quantity Decreased Water Quantity -- Forest Management; Agricultural Practices Riparian Degradation; Water: Storage or Withdrawal Juveniles, adults Loss of wetland structure and groundwater withdrawals lower base flows