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End-to-end diaphragm wall may be needed for Medigadda Barrage: Uttam
In Short
Stilling basins at Medigadda; Annaram and Sundilla to be strengthened
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Minister for Irrigation and Civil Supplies N Uttam Kumar Reddy
Hyderabad: The rehabilitation of the Medigadda barrage of the Kaleshwaram Lift Irrigation Scheme is likely to include the construction of end-to-end diaphragm wall, Minister for Irrigation and Civil Supplies N Uttam Kumar Reddy said on Sunday.
The strengthening and extension of downstream stilling basins would be needed for all three barrages- Annaram, Sundilla and Medigadda of the project. Uttam said diaphragm wall may have to be constructed across the entire width of the Medigadda barrage to provide comprehensive foundation protection.
The stilling basins located downstream of the barrages are also expected to be strengthened and extended to reduce the velocity of floodwaters and improve energy dissipation. These interventions are being considered based on preliminary examination of the extensive technical tests conducted at the three barrages.
“The proposal under consideration is to construct a diaphragm wall from one end to the other at Medigadda Barrage. The existing stilling basins may also have to be strengthened and extended to control the velocity of floodwaters,” Uttam Kumar Reddy said.
However, he clarified that the final rehabilitation designs were yet to be submitted. IIT Bombay and internationally reputed engineering consultancy AFRY India have been engaged to study the test reports and prepare the repair and rehabilitation designs.
The minister said the soil, concrete and foundation tests recommended by the National Dam Safety Authority were nearing completion. The design agencies were now examining the findings to determine the precise structural interventions required at each barrage.
“The final design report is expected within two or three weeks. We are planning to begin the rehabilitation works in November or, at the latest, December and complete them by June 2027, before the next monsoon,” he said.
