River Treaty and undertook to build three storage dams on the
Columbia River north of the 49th carallel. The Hugh Keenleyside
dam north of Castlegar, ‘completed in 1969, was one of the first
to be built. Reservoir inundation resulted in raising t

of the Arrow Lakes approximately £0' above the old high water

Level.

Prior to inundation, the minimum water. tevel of the Arrow

Lakes was about 136

' above sea ievel while the maximum water

7
level was-about L008:

feet. Since inundsti

increased te i374? and 14Lh' respectively; @ maximum water level
variation of 70 vertical feet. (Sigma Resources,-1975, p.61). Most
archaeological sites recorded on the Arrow Lakes between 1961. and
1977 were situated at elevations setween the 1400! and 1ALL? level.
As a result, most archaeological sites on the Lakes have been sub-

jected to an annual cycle of exp

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on, and damage to

Since inundation of the Arrow Lakes pondage in 1969, no

archaeological research was conducted in the Arrow Lakes region

prior to tne 1977 survey. When the Arrow Lakes were flooded in
1969, there were 115 known archaeological sites on the Arrow Lakes;
77 recorded in 1961 and the remeinder between 1966 and 1969. Most
of these sites were situated in tne valley corridors within the
active flood zone of the reservoir. With § years of annual expos-
ure and inundat tion of archaeolozical sites within the active flood

zone on the Lakes, the Archaeoicgical Sites Advisory Board knew

ned deteriorated but the extent

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