sentences:  Bear Head Lake is then in turn drained by Bear Head Creek, which continues north-east, crossing the Manitoba boundary, to join the Swan River on its journey to Swan Lake.Madge Lake is therefore part of the Swan River drainage basin, rather than the watershed of the nearby Assiniboine River.The lake water is only very slightly eutrophic (and so can be described as mesotrophic), and is also moderately hard and alkaline, with a limestone-buffered pH of about 8.2.