Demolition finally kicked off this week for the William Gammon Insurance building, a small office structure dating back to the 1980s at the southeast corner of West 17th and Guadalupe Streets in downtown, soon to be cleared from its 0.3-acre site at 313 West 17th Street where New York-based investment firm Reger Holdings plans to break ground on the Linden, a 28-story project that's . . .
