Related Links: Imagining Construction's Future It was dusk. The 31-foot sloop cut silently southward through the smooth Hudson River on New York City’s west side. Joe Barone sat at the wheel and let the breeze sift through his silver-flecked hair on this balmy August evening. The 50-year-old contractor was looking for his favorite site on Manhattan, a few blocks inland on 28th street overlooking the sparkling, wildflowered, elevated pathway of the world-famous High Line. He saw a rambling, curvaceous 30-story structure changing its facade every few minutes before his eyes, reproducing swooping multicolored patterns with pointillistic detail through the night.