X0303 4 2008-09-11 0 0000104918 AVISTA CORP AVA 0001174958 MEYER DAVID J 1411 E MISSION AVE SPOKANE WA 99202 0 1 0 0 Vice President Common Stock 2008-09-11 4 M 0 14540 18.31 A 16706 D Common Stock 2008-09-11 4 M 0 5460 18.31 A 22166 D Common Stock 2008-09-11 4 S 0 14540 22.0113 D 7626 D Common Stock 2008-09-11 4 S 0 5460 22.007 D 2166 D Common Stock held in 401(k) Investment Plan 9904 I by Trustee Common Stock held in Executive Deferral Plan 8414 I by Trustee Common Stock held in IRA at D.A. Davidson & Co. 5743 I by Trustee Exercise of Stock Option 18.31 2008-09-11 4 M 0 14540 22.0113 D 2008-09-16 Common Stock 14540 0 D Exercise of Stock Option 18.31 2008-09-11 4 M 0 5460 22.007 D 2008-09-16 Common Stock 5460 0 D Transaction per Mr. Meyer's 10b5-1 Plan dated March 13, 2008. Options vest in four equal annual installments beginning on the first anniversary of the grant date. Mr. Meyer received an option grant of 14,540 shares on 09/16/1998. Options vest in four equal annual installments beginning on the first anniversary of the grant date. Mr. Meyer received an option grant of 5,460 shares on 09/16/1998. Total reflects the number of derivative securities remaining under this particular option grant. /s/ David J. Meyer 2008-09-15