Welcome to Copper Basin! Residents enjoy a beautiful waterfall main entrance, a community “splash pad,” toy structure and green common areas. Walk to Prospect Elementary! You can find Copper Basin located on the south side of McMillan Road, between Locust Grove and Meridian Roads in Meridian, ID. As one of Meridian’s established Boise, Idaho communities, Copper Basin is a great community to live in within the Boise real estate area.