STUDY AUTHORS: R2 Resource Consultants; CH2M Hill, HDR Alaska; Buell and Associates, Bailey Environmental

Fish and aquatic invertebrates are an essential component of the Bristol Bay region. This chapter presents the results from extensive field studies addressing fish and aquatic invertebrate distribution, density, and abundance; channel morphology; habitat; flow/habitat relationships; fluvial geomorphology; and water temperature modeling. The discussion addresses spatial and temporal trends.


  • The North Fork Koktuli, South Fork Koktuli and Upper Talarik watershed each represent 0.3 percent of the entire Bristol Bay drainage basin.
  • As a result of these study efforts, Pebble scientists nominated 23.1 miles of streams to the Alaska Anadromous Waters Catalog.