KEYSPAN GAS EAST CORP

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Prospectus Supplement for Delayed or Continuous Offering

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Annual report pursuant to Section 13 or 15(d)

Notification of late filing of Form 10-K

Prospectus Supplement for Delayed or Continuous Offering

Prospectus Supplement for Primary Offering

Prospectus Supplement for Delayed or Continuous Offering

Registration statement under Securities Act of 1933 (amendment)