Final answer:
Lake Mead is the largest man-made lake/reservoir in New Mexico, created by the Hoover Dam.
Step-by-step explanation:
The largest man-made lake/reservoir in New Mexico is Lake Mead, which is located behind the Hoover Dam in Nevada.
The reservoir was created by the dam and is the largest in the United States.
It has a capacity of over 28 million acre-feet of water.