valvbroar

Valvbroar, a Swedish term, translates to "valve bridges" and refers to structures that control the flow of water in canals and waterways, particularly those associated with locks. These bridges are integral to the operation of lock systems, serving as platforms from which lock gates are manipulated. Often, valvbroar are equipped with mechanisms, such as winches or hydraulic systems, to raise and lower the heavy gates that form the water-tight chambers of the lock.

The design of valvbroar can vary depending on the era and the specific lock system. Some are simple, sturdy constructions designed purely for functionality, while others may incorporate decorative elements. They are typically built to withstand the forces of water and the constant operation of the lock. The presence of a valvbro often signifies a passage that requires a change in water level, allowing vessels to navigate different elevations of a waterway. Historically, valvbroar were crucial for the development of inland navigation and trade.