The Caldwell City Council has voted unanimously to approve a new high-end mixed-use residential development off of Karcher Road.Manager of M3 companies, Mark Tate, presented the project to the council on May 4. The residential project, named Silverleaf Subdivision, will be located between South 10th Avenue and South Indiana Avenue in Caldwell.Silverleaf's plan outlines 655 single-family residential units and one multi-family unit lot with 336 un…