Alexander is a gravity dam located on the Wisconsin River in Merrill, Wisconsin, with a primary purpose of hydroelectric power generation. Built in 1913, this historic structure stands at a height of 38 feet and has a maximum storage capacity of 6600 acre-feet, serving as a critical water resource in the region. The dam's spillway, with a width of 338 feet, is controlled to manage water flow and prevent flooding, showcasing its importance in water resource management.

Managed by the Federal Energy Regulatory Commission, Alexander is a key player in providing clean energy and recreational opportunities in the area. With a hazard potential rated as high and a risk assessment indicating a very high risk level, the dam's safety and structural integrity are closely monitored. Despite its age, Alexander continues to play a vital role in water resource management, highlighting the importance of maintaining and investing in our existing infrastructure to ensure a sustainable and resilient future for our water resources and climate.