Before you stretch the placid waters of Lake Conroe, a large, inland, freshwater lake in southeast Texas. It is a warm, sunny day, and the breeze smells sweet. You’re ready — to the point of excited impatience — to take your watercraft out for a spin on the water. Years ago, after much research and leg work, you carefully chose Walden Marina, one of seven Flagship Marinas in the United States, as the place on Lake Conroe to berth your boat. To you, the waterways are more than a source of recreation; they’re also a precious natural resource. Like most boaters, you do your part to protect them, and you knew that Allison Harpold, the conscientious, hard-working manager at Walden Marina, does everything in her power to make it as clean and green as possible. [...]