Adam Coolidge scrambles over a derelict boat in the Alouette River to attach a heavy sling to the hull. The boat is mostly below the surface, with just the corner of the cabin emerging to give a hint of how long it's been since it was last afloat.Coolidge is wearing a big red dry suit, but says it's more for protection from the rain than his occasional splashes into the river.His small crew has been working a stretch of the lower Alouette River in Pitt Meadows all week. They have a boat in the w