File:SluiceGate1March.jpeg

Summary
Source: https://twitter.com/gbrumfiel/status/1634898012085575681

@gbrumfiel 12 Mar - First we can now definitively say that the damaged sluice gate in this image that emerged last week is sluice gate 1.

More photos: https://twitter.com/kromark/status/1668172208823320576

November HIMARS strike
From reports it seems that this was the damage reported by Russian media on November 6, 2022. Turbulent flow patterns from the dam are seen in satellite photos from November onwards.

This incident would also seem to correlate with comments a Ukrainian commander subsequently made to the Washington Post reporters: 
 * RIA Novosti - ...one rocket hit the dam gateway, there is destruction, an emergency service representative of the Kherson region told reporters.
 * TASS -  Five missiles were shot down by air defense units, one hit the Kakhov Dam gateway, which was destroyed, "the service representative said. The representative of the administration of the Novokakhovsky city district Ruslan Agayev added that the missile strike on the dam of the Kakhovskaya hydroelectric station did not cause critical destruction, the dam is intact.
 * Interfax - "Today at 10:00, 6 HIMARS were hit. The air defense units shot down 5 missiles, one hit the gateway of the Kakhov dam, which was destroyed, "the emergency services spokesman told reporters.


 * Inside the Ukrainian counteroffensive that shocked Putin and reshaped the war - Isabelle Khurshudyan, Paul Sonne, Serhiy Morgunov and Kamila Hrabchuk, The Washington Post, December 29, 2022
 * Kovalchuk considered flooding the river. The Ukrainians, he said, even conducted a test strike with a HIMARS launcher on one of the floodgates at the Nova Kakhovka dam, making three holes in the metal to see if the Dnieper’s water could be raised enough to stymie Russian crossings but not flood nearby villages. The test was a success, Kovalchuk said, but the step remained a last resort. He held off.