Detailed project information for Study Plan Number 09040

Branch :	Conte Anadromous Fish Laboratory
Study Plan Number :	09040
Study Title :	Evaluation of alkalinity enhancement of Craig Brook National Fish Hatchery water on Atlantic salmon production
Starting Date :	01/01/1998
Completion Date :	06/30/2001
Principal Investigator(s) :	Haines, Terry; McCormick, Steve; Watten, Barnaby; Krise, Bill & Cipriano, Rocco C.
Primary PI :	Haines, Terry
Telephone Number :	(413) 863-3804
Email Address :	steve_mccormick@usgs.gov
SIS Number :	5003014
Primary Program Element :	Fisheries and Aquatic Resources
Second Program Element :	Fish and Aquatic Habitats
Status :	Active
Abstract :	The Craig Brook NFH, East Orland, Maine, is the oldest Atlantic salmon production hatchery in the US. This facility is scheduled for significant expansion and modernization to support the hatching and rearing of river-specific Atlantic salmon fry (and possibly smolts in the future) for enhancement of stocks in natal rivers. The present hatchery water supply, Craig Pond, is generally of high quality except that alkalinity (acid neutralizing capacity, ANC) is relatively low. During dry periods when alkalinity is expected to be at the maximum for the year, the water had a total alkalinity of4 mg/L as CaCO3 (80 ueq/L ANC); during spring runoff alkalinity is likely to be less than half this value. Although this exceeds the estimated critical minimum of 20 ueq/L for this species (Lien et al. 1996), the margin of error is low. Further, this low ANC may allow pH values to fluctuate greatly, in response to acidic inputs from rainstorms or snowmelt.
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