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Reservoir in Odisha received over 369,000 cusecs per second in July 2026, prompting authorities to release more than 200,000 cusecs into the Mahanadi River to manage the levels of the massive Indian structure
The Hirakud Dam in Odisha, India, drew attention again in July 2026 after the reservoir reached 623.52 feet. With a significant inflow of water, authorities opened 14 gates and began releasing over 200,000 cubic feet per second to manage the level before reaching the maximum limit of 630 feet.
Hirakud Dam receives more than 369,000 cubic feet of water per second
Built on the Mahanadi River, this dam features one of the largest hydraulic systems in India.
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During the event recorded in July 2026, the water inflow exceeded 369,000 cubic feet per second, also known as cusecs.
At that time, the reservoir level reached 623.52 feet. The reported maximum storage limit for Hirakud is 630 feet, leaving a difference of 6.48 feet from the level recorded at that moment.
In response to this volume, 14 gates were opened. The discharge into the Mahanadi River exceeded 200,000 cusecs, helping to relieve some of the pressure caused by the high water inflow to the reservoir.
The operation of the gates is specifically designed to control the stored volume before the water reaches critical levels. This allows the authorities to manage the amount received and released by the system.
Structure spans approximately 25.8 kilometers
The scale of the Hirakud Dam helps explain the scope of operations conducted during periods of heavy water inflow.
Considering the main structure and its lateral embankments, the entire dam measures about 25.8 kilometers in length.
At one point, this project was recognized as the longest earth dam in the world. Its construction represents one of the major hydraulic engineering interventions conducted in India.
The reservoir associated with the structure has a gross capacity of approximately 5.9 billion cubic meters of water.
When it reaches its maximum level, the surface area of the reservoir extends to about 743 square kilometers, highlighting the volume of water managed by this complex.
Gates Control Water Before Reaching the 630-Foot Limit
The so-called spill occurs when the reservoir reaches the spill level and water flows through the discharge system.
In Hirakud, however, the presence of gates allows for controlled operation before the reservoir reaches its maximum limit. During periods of increased water inflow, a portion of the volume can be released into the Mahanadi.
This mechanism has gained importance in light of the recent elevations observed in the reservoir. Records of significant water inflow episodes show levels exceeding 624 feet, leading to the opening of varying numbers of gates.
Dam Inaugurated in 1957 Addresses Flood Control, Irrigation, and Power Generation
Inaugurated in 1957, Hirakud remains linked to three fundamental functions in the Odisha region: flood control, irrigation, and electricity generation.
The operation of the reservoir, therefore, involves more than just storing billions of cubic meters of water.
The management of inflows and discharges is directly related to the role the structure plays in the Mahanadi river system.
With 25.8 kilometers considering its side dikes, a gross capacity of about 5.9 billion cubic meters, and a maximum area close to 743 km², Hirakud continues to be among the large hydraulic structures in India.
This article was prepared based on the information present in the source material provided, with data, numbers, and information about the Hirakud dam preserved as consulted.
