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:''This article is about the Black River in Orleans County, northern Vermont. Another place in Vermont with the same name is the Black River (Connecticut River) in southeast Vermont.'' The Black River is a tributary of Lake Memphremagog, over long, in northern Vermont in the United States. It is one of the four major rivers in Orleans County. It is the longer but least powerful of the two rivers contained solely within the county.〔The other being the Barton River〕 There are no longer any damsites. It is paralleled much of the way by Vermont Route 14, taking advantage of the terrain of the Black River Valley. ==Course== The Black River is miles in length, originates east of Great Hosmer Pond with headwater tributaries flowing west off Ames Hill in Albany. It drains of land. This river has the lowest gradient of the three main rivers in the basin with an average slope of about per . The Black River watershed contains over of lakes and ponds, the three largest being Elligo Pond, Little Hosmer Pond and Great Hosmer Pond.〔() retrieved July 17, 2008〕 The current is slow. The drop from the source to Lake Memphremagog, including the falls at Irasburg and Coventry is .〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Black River (Lake Memphremagog)」の詳細全文を読む スポンサード リンク
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