Duluth, Minnesota four Catholic schools with coverage up to grades 6 or 8, two Protestant schools, two Montessori schools, and six other charter and private schools. Due to its proximity to the Great Lakes, Duluth is the location for the Large Lakes Observatory. The Large Lakes Observatory operates the largest university-owned research vessel in the Great Lakes, the R/V Blue Heron. Built in 1985 for fishing on the Grand Banks, the Blue Heron was purchased by the University of Minnesota in 1997, sailed from Portland, Maine, up the St. Lawrence Seaway to Duluth, and converted into a limnological research vessel during the
Rivers and lakes of Armenia ones include the Dzoraget and the Pambak. The following table is the list of the biggest rivers in Armenia: Armenia has one very large lake called Lake Sevan and more than 100 small mountain lakes. None of them, except Sevan and Lake Arpi, have yet been extensively studied. The water resources of the lakes amount to about , Sevan holding most of this, nearly (before the drainage it had almost ). At the country's capital, Yerevan, it is possible to find small lakes, often in amusement parks. Rivers and lakes of Armenia The Rivers and lakes in Armenia are mainly