The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
DOE dates the President's Finding of a Severe Energy[2][3] Supply Interruption to 2 September 2005; the White House fact sheet announcing the 30-million-barrel release is dated the next day.
The Office of Petroleum Reserves' account of the Katrina drawdown: the finding, the notice of sale, the bids, the awards and the first delivery from Bryan Mound.[1]
Places Bryan Mound in Brazoria County about three miles south-west of Freeport, Texas, with 19 caverns and 247.1 million barrels of authorised capacity.[1]
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