Hydroplus has developed a variety of fusegate types in response to different and specific project needs. Fusegates vary in height, shape, weight, and building materials.
:
Labyrinth-crested fusegates
at the Terminus Dam in the U.S.
Labyrinth-crested fusegates are used in situations where flood headwaters range from 30% to 140% of the height of the fusegate. The hydraulic properties associated with the labyrinth crest increase the spillway’s effectiveness.
Straight-crested fusegates
at Lyell Dam in Australia
Straight-crested fusegates come in two standard configurations:
- Units designed to withstand high headwaters up to 4 times the height of the fusegate. These massive fusegates are generally made of concrete and have a significant stability factor.
- Units designed to overturn prior to, or immediately after, being overtopped. They are generally used in conjunction with conventional gates. They increase discharge capacity under extreme flooding conditions and provide back-up in the event of malfunction by the conventional gates. As a result of their support role, these units are also called emergency fusegates.
Based on project requirements, semi-labyrinth fusegates (whose design stems from labyrinth-crested fusegates) provide an effective alternative.