Sep 05, 2007 — Boaters wrapping up their summer fun on the St. Lawrence River last weekend saw shoals and rocks they hadn't seen before. Dock space was even tighter than usual at parks and other public tie-ups. The holiday weekend provided just the latest evidence of unusually low water levels that have angered residents up and down the river since mid-August. Some people have simply taken their boats elsewhere. The low water is the latest addition to a list of concerns that especially frustrates those who make their living on the river. Many people blame the Seaway and shippers who brought invasive species, and the New York Power Authority for disturbing the natural state of the river with its hydropower dam. A fishing guide is today's Heard Up North.