Expiration dates are included on products such as food and drink, batteries and medicine to indicate they may not be safe or reliable to consume after the indicated time. Often, risks can be associated with using an expired product. The same could be said for waterway locks and dams. While they don’t come with an expiration date, they do come with an engineered lifespan of about 50 years. Many locks have been in use for close to 80 years, with minimal improvements, due to a lack of funding. Locks in use beyond their lifespan can increase the risks of [...]