A weir is a small dam built across a river to control the upstream water level. Weirs have been used for ages to control the flow of water in streams, rivers, and other water bodies.

A dam is structure built across a river to hold water back, it can be used to store water, control flooding or make electricity. A weir is similar to a dam but it is a lot lower. Dam Removal ...

The U.S. Army Corps of Engineers, St. Paul District, will host an open house on its Lock and Dam 7 outdraft weir modification project Feb. 27, from 5:30 p.m. – 7 p.m. in the Nursing Center at ...