In the ensuing decades, shoreline development in the region continued to grow. New homes were built, many residents converted summer cottages to year-round residences, and recreational boating grew to become a significant economic activity. But greater development also meant that greater impacts were felt from fluctuating water levels, particularly on occasions when water supplies were more extreme than Plan 1958-D was designed to handle. By the 1990's, there was growing dissatisfaction with the current regulation plan.