Form: EFFECT

Notice of Effectiveness

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Notice of Effectiveness

Effectiveness Date: July 12, 2006
Accession Number: 0000950129-06-007006
Submission Type: POS AM
CIK: 0000811596
Company Name: KAISER ALUMINUM CORP
File Number: 333-00071