SEATTLE --
The records were uncovered by the same utility that last month released details of profanity-laced conversations in which Enron traders gleefully gloat about ripping off "those poor grandmothers" in California during the power crisis.
The latest release by the Snohomish Public Utility District provides another glimpse into how Enron allegedly rigged the market at the same time millions of Californians were suffering blackouts and paying high electricity bills.
The utility wants an administrative law judge to order Enron to surrender up to $2 billion in ill-gotten gains. California politicians want Enron to reimburse customers there at least $8.9 billion.
The latest documents show Enron manipulated the market on 473 of 537 days from January 2000 to June 2001, the utility said.
In one scheme, Enron made $222,678 in a three-hour period by shipping power from California to Oregon, masking the original source of the power, and then selling it back to California at highly inflated rates.
The records also show Enron employed at least five other schemes, dubbed "sidewinder," "ping pong," "donkey punch," "spread play" and "Russian roulette."
The documents also show that Enron maintained five separate sets of accounting records.
Enron refused to comment on the records except to say it is cooperating with all investigations. Energy traders routinely keep tapes of their phone calls as a record of oral contracts.
Senator Maria Cantwell, a Washington Democrat, used the evidence to demand a new investigation by the Federal Energy Regulatory Commission. She said the agency's failure to uncover Enron's schemes wound up hurting thousands of customers and the commission tried to keep the utility district from getting access to Enron's tapes.
"When are you going to give justice to the individuals who have been hurt by this Enron market manipulation?" Cantwell asked.
A commission spokesman did not immediately return a call seeking comment.
An administrative law judge's finding that Enron should forfeit $32.5 million in unjust profits is pending before the commission.