PROMMRA's central scenario places operational filling around 15 December, with a conditional window from 24 November to 13 February. The signal rests on a large snow reserve but depends on actual melt, water deliveries and basin operations.
Monitoring on August 2 reported PM2.5 at 7 µg/m³ and PM10 at 21 µg/m³, with ICAP scores of 14 and 16. The daily snapshot was favorable, but local readings must be distinguished from restrictions applying in other Chilean jurisdictions.
A study compared three previously trawled seamounts with Solito, where no evidence of trawling was found. Live corals, sponges and biodiversity have not recovered even after more than a quarter-century without bottom trawling.