Province Summary


Wenatchee Subbasin Summary

The Wenatchee subbasin drains a portion of the east Cascade Mountains in north central Washington within Chelan County. The Wenatchee River enters the Columbia River at river mile (RM) 470. The subbasin covers 849,777 acres, with 231 miles of major streams. Wenatchee River has about163 lineal miles of stream accessible to anadromous salmonids. The watershed originates in the Cascade Mountains, including the Alpine Lakes and Glacier Peak wilderness areas.

The largest landowner in the Wenatchee subbasin is the federal government. The U.S. Forest Service (USFS) is responsible for 76% of the subbasin (671,220 acres), while the Bureau of Land Management (BLM) manages about 200 acres. USFS land is divided into 316,561 acres of congressional-designated wilderness, 242,957 acres multiple resource (including timber harvest) land and 111,702 acres is managed as non-harvest areas. Washington Department of Natural Resources (WDNR) manages about 8,700 acres of state-owned land. Longview Fiber Company owns about 47,760 acres, while other private commercial and non-commercial landowners own the remaining 149,560 acres of the subbasin. Although less than 25% of the subbasin is privately owned, nearly two-thirds of the lineal area of the anadromous streams, primarily lower gradient streams, is bordered by private lands.

Source: Wenatchee Subbasin Plan

Status and Trends of Focal Species in Wenatchee Subbasin
 
Species ESU MPG Population Biological Objective (s) Biological Status Federal Status Data / Charts
Spring Chinook Upper Columbia  Wenatchee-Methow  Wenatchee  Recovery Plan Criteria :
2,000 adults293
 
NOSA Estimate
2017: 347 spawners 474
Redd Counts (natural)
2014: 859 redds (natural) 62
Juvenile Outmigrants
2017: 130,426 juveniles474
Endangered Status & Trends
Summer/Fall Chinook Upper Columbia  Wenatchee-Methow  Wenatchee  Subbasin Plan Objective :
None
 
Adult Escapement
2011: 9,850 adults 64
Not Listed Status & Trends
Coho     Wenatchee  Subbasin Plan Objective :
None
 
2017: 207 adults and jacks65
Not Listed Status & Trends
Pacific Lamprey       Subbasin Plan Objective :
None
 
Unknown Species of Concern No Data
Sockeye       Subbasin Plan Objective :
None
 
Adult Counts (Tumwater Dam)
2017: 23,854 adults 65
Not Listed Status & Trends
Summer Steelhead Upper Columbia  Wenatchee-Methow  Wenatchee  Recovery Plan Criteria :
1,000 natural adults293
 
NOSA Estimate
2015: 1,736 spawners 474
Redd Counts (natural)
2014: 195 redds (natural)500
Juvenile Outmigrantas
2016: 10,135 juveniles474
Threatened Status & Trends
Bull Trout Wenatchee (Within the Upper Columbia River Recovery Unit    Chiwawa River, White River, Little Wenatchee River, Nason Creek, Chiwaukum Creek, Peshastin Creek  Draft Recovery Plan Criteria :
1,876 - 3,176 fish294
 
Redd Counts
2011: 225 redds 63
Adult Counts (Tumwater Dam)
2011: 116 adults 63
Counts (Chiwawa River Weir)
2010: 195 fish (all ages)63
Threatened Status & Trends
Westslope Cutthroat       Subbasin Plan Objective :
None
 
None Species of Concern No Data
    
View abundance data for Wenatchee Subbasin
 
Hatcheries located in Wenatchee Subbasin
**Hatchery data will be updated in 2016**

Hatchery / Acclimation Pond Hatchery Info Releases / Returns Program Reviews(APRE / HSRG / HGMP / USFWS) Map
Butcher Creek Acclimation Pond View View   View
Chiwawa Hatchery View View View View
Leavenworth National Fish Hatchery View View View View
Mackay Fish Hatchery View View   View
Rolfings Acclimation Pond View View    
 
Hatchery Releases and Returns to Wenatchee Subbasin359, 360
**Hatchery data will be updated in 2016**

Some releases into subbasins may be from hatcheries located in other provinces and subbasins. Hatchery releases of anadromous fish, within the geographic range of an ESU/DPS, are listed accordingly.
 
Hatchery / Acclimation Pond Species ESU/DPS Released in 2009 Returns to Collection Facility in 2009 Data as of
Arlington Hatchery Rainbow Trout 1,500 8 / 30 / 2010
Blackbird Island Ponds Summer Steelhead Upper Columbia River Steelhead DPS 49,878 8 / 30 / 2010
Butcher Creek Acclimation Pond Coho 18,999 8 / 30 / 2010
Cascade Salmon Hatchery Coho 353,889 8 / 30 / 2010
Chelan State Fish Hatchery Brook Trout 2,300 8 / 30 / 2010
Brown Trout 15,000 8 / 30 / 2010
Golden Trout 1,305 8 / 30 / 2010
Rainbow Trout 182,215 8 / 30 / 2010
Tiger Trout 8,110 8 / 30 / 2010
Westslope Cutthroat 28,502 8 / 30 / 2010
Chiwawa Hatchery Sockeye 260 8 / 30 / 2010
Spring Chinook Upper Columbia River Spring Chinook ESU 294,083 981 8 / 30 / 2010
Summer Steelhead Upper Columbia River Steelhead DPS 15 (mixed) 8 / 30 / 2010
Dryden Rearing Ponds Summer Chinook 456,805 8 / 30 / 2010
Eastbank Hatchery Coho 121 (mixed) 8 / 30 / 2010
Sockeye 154,772 27,666 (mixed) 8 / 30 / 2010
Spring Chinook Upper Columbia River Spring Chinook ESU 132,434 5,843 (mixed) 8 / 30 / 2010
Summer Chinook 3,180 (mixed) 8 / 30 / 2010
Summer Steelhead Upper Columbia River Steelhead DPS 2,086 (mixed) 8 / 30 / 2010
Entiat Fish Hatchery Coho 219,009 8 / 30 / 2010
Leavenworth National Fish Hatchery Spring Chinook Upper Columbia River Spring Chinook ESU 1,685,038 8 / 30 / 2010
Rolfings Acclimation Pond Coho 23,171 8 / 30 / 2010
Tokul Creek Hatchery Golden Trout 1,200 8 / 30 / 2010
Westslope Cutthroat 1,205 8 / 30 / 2010
Turtle Rock Hatchery Summer Steelhead Upper Columbia River Steelhead DPS 277,265 8 / 30 / 2010
Willard National Fish Hatchery Coho 359,310 8 / 30 / 2010
Recovery Status for ESA-Listed Salmon and Steelhead in the Wenatchee Subbasin421, 406

Updated : 5/27/2010

Species Population Abundance Threshold Mean Abundance Major Spawning Area Growth Rate Recruits / Spawners Current Viability
Summer Steelhead Wenatchee 1,500 716 (1992-2003) 5 of 5 Unknown 0.25-0.81 (1985-96) Low
Spring Chinook Wenatchee 2,000 226 (1995-2004) 5 of 5 1.01 0.74 (1979-98) Low
Limiting Factors in the Wenatchee Subbasin 406, 407

BULL TROUT
Key Limiting Factor Impairment Habitat Affected Threat Type Threat Name Life Stage(s) Description
Food Competition -- Species Management Species Introduction Juveniles Competition with brook trout limits bull trout productivity in the upper watersheds.
Habitat Quantity and Quality Access and Availability Freshwater-Instream Agricultural Practices; Forest Management; Urbanization; Dam or Hydropower Facility Management Migration Impediments Juveniles, adults Diversion dams and culverts create fish passage barriers throughout the subbasin.
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Instream Agricultural Practices; Urbanization Riparian Degradation; Bank Destabilization Juveniles, adults Lack of large woody debris is a problem throughout the subbasin due to land development, roads, and railroad. Lack of high quality cover, refugia, and diverse habitat types along the stream margin also limit productivity. In-channel conditions have been altered by channel straightening, channelization, and simplification.
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Riparian Agricultural Practices; Forest Management Riparian Degradation Juveniles, adults Riparian habitat, channel sinuosity, floodplain function, and off-channel habitat have been lost or degraded. Canopy loss exits on harvested upland habitat.
Instantaneous Mortality Predation -- Species Management Species Introduction Juveniles Predation by brook trout limits bull trout productivity in the upper watersheds.
Water Quality Temperature; Oxygen; pH -- Agricultural Practices; Forest Management; Urbanization; Dam or Hydropower Facility Management Water: Storage or Withdrawal; Water: Temperature and Gas Alteration All The Lower Wenatchee River is on the WDOE 303d list for temperature, pH, and dissolved oxygen. Chiwaukum and Peshastin creeks are also on the 303d list for temperature exceedences. Mission Creek is listed for low dissolved oxygen, high fecal coliform, and pesticides. Chumstick Creek is included on the list for dissolved oxygen, fecal coliform, and pH exceedences. The Little Wenatchee River is listed for temperature exceedence.
Water Quantity Decreased Water Quantity -- Dam or Hydropower Facility Management Water: Storage or Withdrawal Juveniles, adults Low flows are exacerbated by surface water diversions and ground water withdrawals. The Mission, Peshastin, Chumstick, Icicle creeks and Lower Wenatchee River, are 303d listed for low in-stream flows. Low flows and associated high in-stream temperatures prevent or impeded access to spawning grounds and reduce rearing habitat.
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 Small-Scale Structural Complexity; Morphological Changes Freshwater-Instream Agricultural Practices; Urbanization Riparian Degradation; Bank Destabilization Juveniles, adults Lack of large woody debris is a problem throughout the subbasin due to land development, roads, and railroad. Lack of high quality cover, refugia, and diverse habitat types along the stream margin also limit productivity. In-channel conditions have been altered by channel straightening, channelization, and simplification.
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Riparian Agricultural Practices; Forest Management Riparian Degradation Juveniles, adults Riparian habitat, channel sinuosity, floodplain function, and off-channel habitat have been lost or degraded. Canopy loss exits on harvested upland habitat.
Instantaneous Mortality Anthropogenic Mortality -- Fishery Management Harvest Adults Coho are subject to ocean and fresh water harvest.
Instantaneous Mortality Anthropogenic Mortality -- Dam or Hydropower Facility Management Migration Impediments Juveniles Juveniles and adults must pass seven mainstem dams during migration.
Water Quality Temperature; Oxygen; pH -- Agricultural Practices; Forest Management; Urbanization; Dam or Hydropower Facility Management Water: Storage or Withdrawal; Water: Temperature and Gas Alteration All The Lower Wenatchee River is on the WDOE 303d list for temperature, pH, and dissolved oxygen. Chiwaukum and Peshastin creeks are also on the 303d list for temperature exceedences. Mission Creek is listed for low dissolved oxygen, high fecal coliform, and pesticides. Chumstick Creek is included on the list for dissolved oxygen, fecal coliform, and pH exceedences. The Little Wenatchee River is listed for temperature exceedence.
PACIFIC LAMPREY
Key Limiting Factor Impairment Habitat Affected Threat Type Threat Name Life Stage(s) Description
Habitat Quantity and Quality Access and Availability Freshwater-Instream Agricultural Practices; Forest Management; Urbanization; Dam or Hydropower Facility Management Migration Impediments Juveniles, adults Diversion dams and culverts create fish passage barriers throughout the subbasin.
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.
Instantaneous Mortality Anthropogenic Mortality -- Dam or Hydropower Facility Management Migration Impediments Juveniles; adults Juveniles and adults must pass seven mainstem dams during migration.
Water Quality Temperature; Oxygen; pH -- Agricultural Practices; Forest Management; Urbanization; Dam or Hydropower Facility Management Water: Storage or Withdrawal; Water: Temperature and Gas Alteration All The Lower Wenatchee River is on the WDOE 303d list for temperature, pH, and dissolved oxygen. Chiwaukum and Peshastin creeks are also on the 303d list for temperature exceedences. Mission Creek is listed for low dissolved oxygen, high fecal coliform, and pesticides. Chumstick Creek is included on the list for dissolved oxygen, fecal coliform, and pH exceedences. The Little Wenatchee River is listed for temperature exceedence.
Water Quantity Decreased Water Quantity -- Dam or Hydropower Facility Management Water: Storage or Withdrawal Juveniles, adults Low flows are exacerbated by surface water diversions and ground water withdrawals. The Mission, Peshastin, Chumstick, Icicle creeks and Lower Wenatchee River, are 303d listed for low in-stream flows. Low flows and associated high in-stream temperatures prevent or impeded access to spawning grounds and reduce rearing habitat.
SOCKEYE
Key Limiting Factor Impairment Habitat Affected Threat Type Threat Name Life Stage(s) Description
Habitat Quantity and Quality Access and Availability Freshwater-Instream Agricultural Practices; Forest Management; Urbanization; Dam or Hydropower Facility Management Migration Impediments Juveniles, adults Diversion dams and culverts create fish passage barriers throughout the subbasin.
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; Urbanization Riparian Degradation; Bank Destabilization Juveniles, adults Lack of large woody debris is a problem throughout the subbasin due to land development, roads, and railroad. Lack of high quality cover, refugia, and diverse habitat types along the stream margin also limit productivity. In-channel conditions have been altered by channel straightening, channelization, and simplification.
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Riparian Agricultural Practices; Forest Management Riparian Degradation Juveniles, adults Riparian habitat, channel sinuosity, floodplain function, and off-channel habitat have been lost or degraded. Canopy loss exits on harvested upland habitat.
Instantaneous Mortality Anthropogenic Mortality -- Dam or Hydropower Facility Management Migration Impediments Juveniles Juveniles and adults must pass seven mainstem dams during migration.
Water Quality Temperature; Oxygen; pH -- Agricultural Practices; Forest Management; Urbanization; Dam or Hydropower Facility Management Water: Storage or Withdrawal; Water: Temperature and Gas Alteration All The Lower Wenatchee River is on the WDOE 303d list for temperature, pH, and dissolved oxygen. Chiwaukum and Peshastin creeks are also on the 303d list for temperature exceedences. Mission Creek is listed for low dissolved oxygen, high fecal coliform, and pesticides. Chumstick Creek is included on the list for dissolved oxygen, fecal coliform, and pH exceedences. The Little Wenatchee River is listed for temperature exceedence.
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 Agricultural Practices; Forest Management; Urbanization; Dam or Hydropower Facility Management Migration Impediments Juveniles, adults Diversion dams and culverts create fish passage barriers throughout the subbasin.
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; Urbanization Riparian Degradation; Bank Destabilization Juveniles, adults Lack of large woody debris is a problem throughout the subbasin due to land development, roads, and railroad. Lack of high quality cover, refugia, and diverse habitat types along the stream margin also limit productivity. In-channel conditions have been altered by channel straightening, channelization, and simplification.
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Riparian Agricultural Practices; Forest Management Riparian Degradation Juveniles, adults Riparian habitat, channel sinuosity, floodplain function, and off-channel habitat have been lost or degraded. Canopy loss exits on harvested upland habitat.
Instantaneous Mortality Anthropogenic Mortality -- Fishery Management Harvest Adults Spring Chinook are subject to fresh water harvest.
Instantaneous Mortality Anthropogenic Mortality -- Dam or Hydropower Facility Management Migration Impediments Juveniles Juveniles and adults must pass seven mainstem dams during migration.
Instantaneous Mortality Competition; Pathogens -- Artificial Propagation Hatchery Fish Production; Disease Amplification and Transfer Juveniles Competition, genetic introgression, and disease transmission from hatchery introductions may reduce productivity.
Instantaneous Mortality Predation -- Dam or Hydropower Facility Management; Species Management Predators: Fish; Predators: Avian; Predators: Marine Mammal Juveniles An increase in populations of indigenous predator fish species, and the immigration of diving birds are limiting survival of juvenile salmonids. Non-native predator fishes are limiting survival of juvenile salmonids.
Water Quality Temperature; Oxygen; pH -- Agricultural Practices; Forest Management; Urbanization; Dam or Hydropower Facility Management Water: Storage or Withdrawal; Water: Temperature and Gas Alteration All The Lower Wenatchee River is on the WDOE 303d list for temperature, pH, and dissolved oxygen. Chiwaukum and Peshastin creeks are also on the 303d list for temperature exceedences. Mission Creek is listed for low dissolved oxygen, high fecal coliform, and pesticides. Chumstick Creek is included on the list for dissolved oxygen, fecal coliform, and pH exceedences. The Little Wenatchee River is listed for temperature exceedence.
SUMMER CHINOOK
Key Limiting Factor Impairment Habitat Affected Threat Type Threat Name Life Stage(s) Description
Habitat Quantity and Quality Access and Availability Freshwater-Instream Agricultural Practices; Forest Management; Urbanization; Dam or Hydropower Facility Management Migration Impediments Juveniles, adults Diversion dams and culverts create fish passage barriers throughout the subbasin.
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; Urbanization Riparian Degradation; Bank Destabilization Juveniles, adults Lack of large woody debris is a problem throughout the subbasin due to land development, roads, and railroad. Lack of high quality cover, refugia, and diverse habitat types along the stream margin also limit productivity. In-channel conditions have been altered by channel straightening, channelization, and simplification.
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Riparian Agricultural Practices; Forest Management Riparian Degradation Juveniles, adults Riparian habitat, channel sinuosity, floodplain function, and off-channel habitat have been lost or degraded. Canopy loss exits on harvested upland habitat.
Instantaneous Mortality Anthropogenic Mortality -- Fishery Management Harvest Adults Summer Chinook are subject to fresh water harvest.
Instantaneous Mortality Anthropogenic Mortality -- Dam or Hydropower Facility Management Migration Impediments Juveniles Juveniles and adults must pass seven mainstem dams during migration.
Instantaneous Mortality Competition; Pathogens -- Artificial Propagation Hatchery Fish Production; Disease Amplification and Transfer Juveniles Competition, genetic introgression, and disease transmission from hatchery introductions may reduce productivity.
Instantaneous Mortality Predation -- Dam or Hydropower Facility Management; Species Management Predators: Fish; Predators: Avian; Predators: Marine Mammal Juveniles An increase in populations of indigenous predator fish species, and the immigration of diving birds are limiting survival of juvenile salmonids. Non-native predator fishes are limiting survival of juvenile salmonids.
Water Quality Temperature; Oxygen; pH -- Agricultural Practices; Forest Management; Urbanization; Dam or Hydropower Facility Management Water: Storage or Withdrawal; Water: Temperature and Gas Alteration All The Lower Wenatchee River is on the WDOE 303d list for temperature, pH, and dissolved oxygen. Chiwaukum and Peshastin creeks are also on the 303d list for temperature exceedences. Mission Creek is listed for low dissolved oxygen, high fecal coliform, and pesticides. Chumstick Creek is included on the list for dissolved oxygen, fecal coliform, and pH exceedences. The Little Wenatchee River is listed for temperature exceedence.
SUMMER STEELHEAD
Key Limiting Factor Impairment Habitat Affected Threat Type Threat Name Life Stage(s) Description
Habitat Quantity and Quality Access and Availability Freshwater-Instream Agricultural Practices; Forest Management; Urbanization; Dam or Hydropower Facility Management Migration Impediments Juveniles, adults Diversion dams and culverts create fish passage barriers throughout the subbasin.
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; Urbanization Riparian Degradation; Bank Destabilization Juveniles, adults Lack of large woody debris is a problem throughout the subbasin due to land development, roads, and railroad. Lack of high quality cover, refugia, and diverse habitat types along the stream margin also limit productivity. In-channel conditions have been altered by channel straightening, channelization, and simplification.
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Riparian Agricultural Practices; Forest Management Riparian Degradation Juveniles, adults Riparian habitat, channel sinuosity, floodplain function, and off-channel habitat have been lost or degraded. Canopy loss exits on harvested upland habitat.
Instantaneous Mortality Anthropogenic Mortality -- Dam or Hydropower Facility Management Migration Impediments Juveniles Juveniles and adults must pass seven mainstem dams during migration.
Instantaneous Mortality Competition; Pathogens -- Artificial Propagation Hatchery Fish Production; Disease Amplification and Transfer Juveniles Competition, genetic introgression, and disease transmission from hatchery introductions may reduce productivity.
Instantaneous Mortality Predation -- Dam or Hydropower Facility Management; Species Management Predators: Fish; Predators: Avian; Predators: Marine Mammal Juveniles An increase in populations of indigenous predator fish species, and the immigration of diving birds are limiting survival of juvenile salmonids. Non-native predator fishes are limiting survival of juvenile salmonids.
Water Quality Temperature; Oxygen; pH -- Agricultural Practices; Forest Management; Urbanization; Dam or Hydropower Facility Management Water: Storage or Withdrawal; Water: Temperature and Gas Alteration All The Lower Wenatchee River is on the WDOE 303d list for temperature, pH, and dissolved oxygen. Chiwaukum and Peshastin creeks are also on the 303d list for temperature exceedences. Mission Creek is listed for low dissolved oxygen, high fecal coliform, and pesticides. Chumstick Creek is included on the list for dissolved oxygen, fecal coliform, and pH exceedences. The Little Wenatchee River is listed for temperature exceedence.
WESTSLOPE CUTTHROAT
Key Limiting Factor Impairment Habitat Affected Threat Type Threat Name Life Stage(s) Description
Habitat Quantity and Quality Access and Availability Freshwater-Instream Agricultural Practices; Forest Management; Urbanization; Dam or Hydropower Facility Management Migration Impediments Juveniles, adults Diversion dams and culverts create fish passage barriers throughout the subbasin.
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Instream Agricultural Practices; Urbanization Riparian Degradation; Bank Destabilization Juveniles, adults Lack of large woody debris is a problem throughout the subbasin due to land development, roads, and railroad. Lack of high quality cover, refugia, and diverse habitat types along the stream margin also limit productivity. In-channel conditions have been altered by channel straightening, channelization, and simplification.
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Riparian Agricultural Practices; Forest Management Riparian Degradation Juveniles, adults Riparian habitat, channel sinuosity, floodplain function, and off-channel habitat have been lost or degraded. Canopy loss exits on harvested upland habitat.
Water Quality Temperature; Oxygen; pH -- Agricultural Practices; Forest Management; Urbanization; Dam or Hydropower Facility Management Water: Storage or Withdrawal; Water: Temperature and Gas Alteration All The Lower Wenatchee River is on the WDOE 303d list for temperature, pH, and dissolved oxygen. Chiwaukum and Peshastin creeks are also on the 303d list for temperature exceedences. Mission Creek is listed for low dissolved oxygen, high fecal coliform, and pesticides. Chumstick Creek is included on the list for dissolved oxygen, fecal coliform, and pH exceedences. The Little Wenatchee River is listed for temperature exceedence.
Water Quantity Decreased Water Quantity -- Dam or Hydropower Facility Management Water: Storage or Withdrawal Juveniles, adults Low flows are exacerbated by surface water diversions and ground water withdrawals. The Mission, Peshastin, Chumstick, Icicle creeks and Lower Wenatchee River, are 303d listed for low in-stream flows. Low flows and associated high in-stream temperatures prevent or impeded access to spawning grounds and reduce rearing habitat.