Ulbrich Reservoir, Wallingford

Ulbrich Reservoir is a 154-acre public drinking water supply. Public access is prohibited. The reservoir is surrounded by forest, and a steep ridge rises from the water to a ridge on the lake's eastern side. The invasive Eurasian watermilfoil (Myriophyllum spicatum) was the most abundant of nine aquatic plants recorded in our July 2005 survey. The species occurred in water from 3 - 13 feet (1 - 4 m) deep all around the lake, although it was most abundant in the lake's south end, where it formed a continuous band along the eastern and western shores. Eurasian watermilfoil extended as much as 175 feet (50 m) from shore in shallow water at the southern end of the reservoir. Eurasian watermilfoil occurred in scattered patches on the east and west sides in the northern half of the reservoir, and it grew densely in a 10 feet (3 m) wide band in front of a dam at the north end.