What's going on down at the Bayou? Earth-moving and construction project explained

The official project lingo is a mouthful: 

Channel Conveyance Restoration at Buffalo Bayou Park

Here is the photo of one of the explanatory signs posted at several points along the trail with further information --  in its proper setting (with the Heritage Plaza Tower and other skyscrapers looming over it). This image is in high resolution so you can read the small print. That means it may take a little longer for the image to load (or you may have to click through to the full-sized file version in the Picasa photo collection associated with this blog).

Sign explaining Buffalo Bayou construction work currently in progress inside the Loop