The National Dam Safety Authority (NDSA) experts’ team that made a physical inspection of the Medigadda, Annaram and Sundilla Barrages of Kaleshwaram Lift Irrigation Project (KLIP) on March 7 and 8 following sinking of piers in the 7th Block of Medigadda on October 21 last has not ruled out the possibility of any further unexpected movement/behaviour of the “structure in highly distressed condition”.
In its interim report sent to the State government, the experts committee has recommended several interim measures to be taken up before the onset of monsoon season to maintain the status quo of the distressed condition. In case of the Block-7 of Medigadda the panel suggested crack monitoring, bracing piers 16 to 22 adequately at appropriate locations to arrest any likely lateral movement and rectification/replacement of defective/damaged pressure release valves in the raft.
Also suggested was installation of optical targets — one each at upstream and downstream and at the middle on all piers in the Block for continuous monitoring and recording, assessment of upstream and downstream secant pile and parametric joint, removal of plinth slab which has been settled/displaced/damaged, compacting of river bed properly and placing of sand-filled bags against the vertical face of the plinth slab.
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