1. Map showing estimated 7-day, 10-year low flow of streams in the Connecticut Valley urban area, central New England [cartographic material] Yale Public content 1979. 2014-02-27T15:42:46Z. 2014-03-13T22:16:01Z. Brackley, Richard A., 1927-. U.S. Geological Survey. English. Public. Connecticut River Valley and U.S.