A pretty yellow tower crane rises above Ancora, the first phase of the Riverline project from CMK Companies.

You can’t stop a development with a tower crane. You can’t even hope to contain one.

Riverline has one of the newest machines in Chicago construction. A pretty yellow one at that. And its first task is Ancora, the 29-story apartment tower at 720 South Wells Street in the South Loop previously known (according to permits) as “Building D.”

Perkins + Will designed Ancora for CMK Companies, and it will be the first of many structures erected in the Riverline project. There will be 452 apartments and 246 parking spaces included with this phase. Lendlease is taking care of the heavy lifting.