The state Department of Natural Resources is considering the possibility of stocking trout in Plymouth Lake, which is just north of Old U.S. 2 in Wakefield. The lake, also sometimes called a pond, is known to many local residents as Plymouth Open Pit because of its history as a mine in the previous century. MDNR will likely check the levels of heavy metals such as mercury, due to dynamite blasting. It is believed the lake holds yellow perch and panfish. And, the DNR wants to be sure it can support trout before stocking occurs. Plymouth Lake is 7,600 feet long and 900 feet wide. And, is 325 feet deep at it’s deepest point.