Stop log gate


Stop logs are a hydraulic engineering control element that are used in floodgates to adjust the water level or flow rate in a river, canal, or reservoir. Stop logs are sometimes confused with flash boards, as both elements are used in bulkhead or crest gates. Stop logs are typically long rectangular timber beams or boards that are placed on top of each other and dropped into pre-made slots inside a weir, gate, or channel. Present day, the process of adding and removing stop logs is not manual, but done with hydraulic stop log lifters and hoists. Since the height of the barrier can only be adjusted through the addition and removal of stop logs, finding a lighter and stronger material other than wood or concrete became a more desirable choice. Other materials, including steel and composites, can be used as stop logs as well. Stop logs are designed to cut off or stop flow through a conduit.


Stop logs are modular in nature, giving the operator of a gated structure the ability to control the water level in a channel by adding or removing individual stop logs. A gate may make use of one or more logs. Each log is lowered horizontally into a space or bay between two grooved piers referred to as a stop log check. In larger gate structures, there will be multiple bays in which stop logs can be placed to better control the flow rate through the structure. Stop logs are frequently used to temporarily block flow through a spillway or canal during routine maintenance. At other times stop logs can be used over longer periods of times, such as when a field is flooded and stop logs are being used in smaller gates in order to control the depth of water in fields. The logs may be left in and adjusted during the entire time that the field is submerged.In most cases, the boards used are subjected to high flow conditions. As individual stop logs begin to age they are replaced. Typically small amounts of water will leak between individual logs. Stop logs are typically used in structures where the removal, installation, and replacement of the logs is expected in freqeuently. When larger flows of water are passing through a stop log gate, it can be difficult to remove or place individuals logs. Larger logs often require multiple people to position and lift the logs.

Flood gates, also called stop gates, are adjustable gates used to control water flow in flood barriers, reservoir, river, stream, or levee systems. They may be designed to set spillway crest heights in dams, to adjust flow rates in sluices and canals, or they may be designed to stop water flow entirely as part of a levee or storm surge system. Since most of these devices operate by controlling the water surface elevation being stored or routed, they are also known as crest gates. In the case of flood bypass systems, floodgates sometimes are also used to lower the water levels in a main river or canal channels by allowing more water to flow into a flood bypass or detention basin when the main river or canal is approaching a flood stage.

Specification of Stop log gate-

Stop log gate are manufactured and erected by us with all IS Material according to Design and Drawings at Site or Workshop at the time of Fabrication and Tests shall be Carried out by our Quality Control Lab and Relevant Equipments.