THERE has recently been issued by the Water Power Branch of the Canadian Department of the Interior a report, dated February i last, which reviews the present position of water power development in the Dominion. During the year 1923 there was an increase of more than a quarter of a million horse-power, and the total hydraulic power installation of the country now aggregates the imposing total of 3,227,414 h.p. The known available water power from all sources is computed at 18,255,000 h.p. for conditions of ordinary minimum flow, and at 32,076,000 h.p. under a flow estimated for maximum development, i.e. a flow which can be depended upon for, at least, six months of the year. These estimates are of a conservative character; from observations of existing plant it is found that the average machine installation is 30 per cent, greater than the six-months' flow maximum power. Accordingly, it may be safely inferred that the present turbine installation of 3,227,414 h.p. represents only 8 per cent, of the recorded available water power resources.