Exhibit 99.1

[Letterhead of William C. Denninger]

September 6, 2007

Mr. Jerald D. Bidlack
Chairman of the Board
Graham Corporation
20 Florence Avenue
Batavia, NY 14020

Re:  Resignation From Board

Dear Jerry,

As we have discussed, please accept this letter as my formal resignation from the Board of Directors of Graham Corporation, effective immediately. Although I am electing to resign from Graham’s Board in order to pursue other opportunities, I have enjoyed my tenure on the Board and wish Graham and its directors, officers and employees continued future success.

Best regards,

/s/ William C. Denninger
William C. Denninger

cc:  Daniel R. Kinel