The English River Thames is navigable from Cricklade or Lechlade to the sea, and this part of the river falls 71 meters (234 feet). There are 45 locks on the river, each with one or more adjacent weirs. These lock and weir combinations are used for controlling the flow of water down the river, most notably when there is a risk of flooding, and provide for navigation above the tideway.
Penton Hook Lock with City of London arms on the House. The green box is the hydraulic control system
Goring Lock demonstrates the common juxtaposition of weir, lock island, lock keeper's house and lock
Choice of Yellow and Red warning boards which are placed on lock gates when navigation is hazardous
Kayaker at Boulter's Weir
Environment Agency
Videos
The Environment Agency (EA) is a non-departmental public body, established in 1996 and sponsored by the United Kingdom government's Department for Environment, Food and Rural Affairs, with responsibilities relating to the protection and enhancement of the environment in England.
The Thames Barrier is one of the flood risk management installations operated by the Environment Agency
A remote controlled ARC-Boat that is used to collect river and estuarine data, assisting in flood forecasting
The Environment Agency operates numerous locks, such as this one at Godstow, Oxfordshire