In Oregon, tide gates are commonly used to control water in tidally influenced areas along the coast and lower portions of the Columbia River Basin. Traditionally, tide gates are constructed by integrating one-way doors (i.e. the tide gate) into a dike. Freshwater drains from streams above the tide gate during outgoing tides. Water pressure from incoming tides closes the gate, protecting agriculture, infrastructure, and other developed landscapes from tidal inundations. Unfortunately, preventing inundation can also slow or prevent tidal flows into the estuaries, which can impede the migration of native fish, diminish water quality, and reduce estuarine ecological functions.