228 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
covered with a rank growth of coarse grass and shrubs. In places it broadens out 
into small grassy flats with low banks of earth and stones; again, the banks are high, 
steep, and grassy, with rocky ledges outcropping in places. The bed is chiefly of 
shingle and gravel, with some sand in the wider parts; at the rapids and riffles there 
are bare rocky ledges, small bowlders, and heavy stones. There are no falls in the 
stream, but several short rapids, none of which, however, would prevent even a 
humpback salmon from easily ascending. The fall from the lake to high-water mark 
of the bay is about 40 feet. At the lake the outlet is about 18 feet wide with an 
average depth of l£ feet, and the current sluggish, less than 1 knot per hour. 
Free-hand sketch of North Olga stream and lake, Olga Bay, Alitak, Kadiak Island. 
About half a mile from the lake the stream receives a small tributary known 
locally as Babbling Brook, which drains the rolling hills to the eastward. There are 
also several tiny rills carrying seepage from the surrounding hills into the stream, 
but their total volume is inconsiderable. At the beach the discharge of the stream 
is about 12 feet wide, average depth 2 feet, and current about 1| knots per hour. A 
short distance from the beach of Olga Bay the stream widens into a small lagoon- 
like basin, into which the tide water backs through a narrow channel. Apparently 
this channel shifts from time to time with the changing of the shingle after heavy 
southerly gales; at present the outlet bends sharply to the eastward and runs parallel 
to the beach, separated from it by a ridge of shingle a few feet wide, and 100 yards 
distant discharges into the bay. The lagoon, so called, is about 160 yards long and 
