GRAND RAPIDS, Mich. (WOOD) – What’s going on in the Grand River? Drivers going through downtown Grand Rapids on I-196 or US-131 this week may have heavy equipment loading rocks into the Grand River.

Urged by shouting coworkers near Voluntown’s Lowdon Brook one morning last week, a crew of sweating laborers hauled a rope tied to an enormous sack bearing some 4,000 pounds of rocks. The swaying load ...