Province Summary


Sanpoil Subbasin Summary

The San Poil River originates in the Okanogan Highlands east of the Okanogan River and drains in a southerly direction for 27 miles through parts of the Colville and Okanogan National Forests in Ferry and Okanogan counties. The river then enters the Colville Indian Reservation and flows approximately 32 miles south before it enters the impounded Columbia River in the San Poil arm of Lake Roosevelt at river mile 615.5. The resulting reservoir, Lake Roosevelt, inundates 33,490 ha at a full pool elevation of 1,289 ft (msl). Annual water retention time is less than 40 days.

The primary land uses in this Subbasin are agriculture, grazing, logging, and mining. Cattle grazing is present throughout contributing to soil compaction, increased stream width-to-depth ratios, and displacement of native wildlife species. The Subbasin is heavily forested with many areas of timber harvest and associated roads present on Colville Indian Reservation lands, Colville National Forest Lands, and private lands. On a much smaller scale, urban development (towns of Republic and Keller) has also occurred.

Source: Intermountain Province Plan

Status and Trends of Focal Species in Sanpoil Subbasin
 
Species ESU MPG Population Biological Objective (s) Biological Status Federal Status Data / Charts
Chinook       Subbasin Plan Objective :
None
 
Extirpated Not Listed No Data
Kokanee       Subbasin Plan Objective :
None
 
Migrating Spawners Collected
2017:
26 fish 481
Not Listed Status & Trends
Rainbow Trout       Subbasin Plan Objective :
Catch rate of greater than 1 fish per hour329
 
Migrating Spawners Collected
2017:
363 fish 481
Species of Concern Status & Trends
    
View abundance data for Sanpoil Subbasin
 
Hatcheries located in Sanpoil Subbasin
**Hatchery data will be updated in 2016**

   There are no hatcheries located in this subbasin.
 
 
Hatchery Releases and Returns to Sanpoil Subbasin
No hatchery releases and/or returns for subbasin.
Recovery Status for ESA-Listed Salmon and Steelhead in the Sanpoil Subbasin

    No recovery status for Sanpoil subbasin.
Limiting Factors in the Sanpoil Subbasin 408

KOKANEE
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; Urbanization Migration Impediments Juveniles, adults Chief Joseph and Grand Coulee dams, both of which lack fish passage facilities, prevent upriver migrations and negatively impact downriver migration. Resident fish emigrating downstream are entrained and are unable to return to the subbasin. Major barriers (i.e., culverts) exist along State Highway 21 blocking most Westside streams to fish migration except the West Fork of the San Poil River and the North and South Nanamkin creeks.
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Instream Agricultural Practices; Forest Management; Urbanization Impervious Surfaces (Road Density); Riparian Degradation Juveniles, adults Embedded substrate and reduced habitat complexity, due to anthropogenic activities, limits native salmonid populations.
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Riparian Agricultural Practices; Forest Management; Urbanization Riparian Degradation Juveniles, adults Channel stability is decreased because of cleared riparian areas.
Sediment Conditions Increased Sediment Quantity Freshwater-Instream Agricultural Practices; Forest Management; Urbanization Impervious Surfaces (Road Density); Riparian Degradation All Decreased channel stability from cleared riparian areas and high road densities combine to create fine sediment issues throughout the subbasin.
Water Quality Temperature; Oxygen -- Agricultural Practices; Forest Management; Urbanization Riparian Degradation; Water: Storage or Withdrawal All Oxygen and temperature conditions are impaired throughout the subbasin due to forest management practices and water diversions.
Water Quantity Decreased Water Quantity -- Agricultural Practices; Forest Management Water: Storage or Withdrawal All Low flows exist throughout the subbasin due to forest management practices and water diversions.
REDBAND TROUT
Key Limiting Factor Impairment Habitat Affected Threat Type Threat Name Life Stage(s) Description
Biological Viability Criteria Diversity -- Fishery Management Species Introduction Adults Non-native rainbow trout releases lead to hybridization with native redband trout.
Habitat Quantity and Quality Access and Availability Freshwater-Instream Dam or Hydropower Facility Management; Urbanization Migration Impediments Juveniles, adults Chief Joseph and Grand Coulee dams, both of which lack fish passage facilities, prevent upriver migrations and negatively impact downriver migration. Resident fish emigrating downstream are entrained and are unable to return to the subbasin. Major barriers (i.e., culverts) exist along State Highway 21 blocking most Westside streams to fish migration except the West Fork of the San Poil River and the North and South Nanamkin creeks.
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Instream Agricultural Practices; Forest Management; Urbanization Impervious Surfaces (Road Density); Riparian Degradation Juveniles, adults Embedded substrate and reduced habitat complexity, due to anthropogenic activities, limits native salmonid populations.
Habitat Quantity and Quality Small-Scale Structural Complexity; Morphological Changes Freshwater-Riparian Agricultural Practices; Forest Management; Urbanization Riparian Degradation Juveniles, adults Channel stability is decreased because of cleared riparian areas.
Sediment Conditions Increased Sediment Quantity Freshwater-Instream Agricultural Practices; Forest Management; Urbanization Impervious Surfaces (Road Density); Riparian Degradation All Decreased channel stability from cleared riparian areas and high road densities combine to create fine sediment issues throughout the subbasin.
Water Quality Temperature; Oxygen -- Agricultural Practices; Forest Management; Urbanization Riparian Degradation; Water: Storage or Withdrawal All Oxygen and temperature conditions are impaired throughout the subbasin due to forest management practices and water diversions.
Water Quantity Decreased Water Quantity -- Agricultural Practices; Forest Management Water: Storage or Withdrawal All Low flows exist throughout the subbasin due to forest management practices and water diversions.