Round Valley Reservoir

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The Round Valley Reservoir in Clinton Township, New Jersey was formed in 1960 when the New Jersey Water Authority constructed two large dams and flooded a large valley in the state's Hunterdon County.

The reservoir is named after the naturally formed circular valley surrounded by Cushetunk Mountain. The deep Valley was caused by erosion of the soft sedimentary rock. The surrounding ridges of Cushetunk Mountain endure because they were underlaid with dense and durable volcanic rock diabase that cooled slowly under the surface of the earth.

Here are some big numbers for this body of water:  Round Valley reaches depths of 180 feet (55 m). This 2,000 acre (8 km²) reservoir is best known for its pristine clear blue waters. The reservoir contains 55 billion gallons of water for use in central New Jersey, and is distributed during times of drought via the nearby south branch of the Raritan River.

The reservoir has been called the Bermuda Triangle of New Jersey as over 25 people have drowned there since 1971 and 6 of them have never been found.

The New Jersey Division of Wildlife claims the reservoir is the southernmost body of water that contains naturally reproducing lake trout. Some of the other species of fish in the lake include bass, pickerel, catfish, american eel, yellow perch, brown trout, and rainbow trout. The park also has a wilderness area for camping, swimming facilities, a boat ramp and nature hiking and biking trails.

http://www.njparksandforests.org/parks/round.html
http://www.nynjtc.org/park/round-valley-state-park
http://www.roundvalleyfishing.com