An Innovative Weir
From the California Department of Water Resources (DWR) Spotlight:
“Rebuilt Weir #2 on the Sutter Bypass has an innovation new to DWR. Like many weirs, #2 dams the water flow to create a pool for nearby irrigation, but uniquely, this weir’s gates close when compressed air inflates large air bladders that force the gates upward to dam the water.”
Read more from DWR’s Spotlight