The Detroit Edison Company 2000 2nd Ave., Detroit, MI 48226-1279

Jon P. Christinidis (313) 235-7706 christinidisj@dteenergy.com

June 15, 2006 Donald E. Erickson, Esq. Assistant Attorney General Michigan Dept. of Attorney General 525 W. Ottawa St, Floor 7 P.O. Box 30755 Lansing, Michigan 48909

Re: In the matter of the application of The Detroit Edison Company for reconciliation of its power supply cost recovery plan for the 12-month period ending December 31, 2005, and to reconcile its pension equalization mechanism for years 2004 and 2005

MPSC Case No. U-14275-R

Dear Mr. Erickson: Enclosed please find The Detroit Edison Company’s response to the Attorney General’s First Discovery Request along with a Proof of Service. Very truly yours,

Jon P. Christinidis JPC/kbt Enclosures cc: ALJ Daniel E. Nickerson, Jr. (cover letter and Proof of Service only)

All Parties of Record

STATE OF MICHIGAN

BEFORE THE MICHIGAN PUBLIC SERVICE COMMISSION

In the matter of the Application ) Of THE DETROIT EDISON COMPANY ) For Reconciliation of its Power Supply Cost ) Case No. U-14275-R Recovery Plan for the 12-month Period ) Ending December 31, 2005. ) PROOF OF SERVICE STATE OF MICHIGAN ) ) ss. COUNTY OF WAYNE ) Jennifer Evans, being duly sworn, deposes and says that on the 15th day of June, 2006, a

copy of THE DETROIT EDISON COMPANY’S RESPONSE TO THE ATTORNEY

GENERAL’S FIRST DISCOVERY REQUEST in the above captioned matter was served

upon the persons on the attached service list via e-mail and first class mail.

Jennifer Evans Subscribed and sworn to before me this 15th day of June, 2006. ___________________________ Notary Public

MPSC Case No. U-14275-R 2005 Detroit Edison PSCR Reconciliation

June 5, 2006 SERVICE LIST

ABATE Robert A.W. Strong Clark Hill PLC 255 S, Old Woodward Ave, 3rd Floor Birmingham MI 48009-6179 rstrong@clarkhill.com James T. Selecky Brubaker & Associates, Inc. 1215 Fern Ridge Parkway, Suite 208 P.O. Box 412000 St. Louis, MO 63141-2000 jtselecky@consultbai.com THE DETROIT EDISON COMPANY Jon P. Christinidis Bruce R. Maters 2000 2nd Avenue, 610 WCB Detroit, MI 48226 christinidisj@dteenergy.commpscfilings@dteenergy.com MICHIGAN ATTORNEY GENERAL Donald E. Erickson Assistant Attorney General P.O. Box 30212 Lansing, MI 48909 ericksond@michigan.gov MEC & PIGRIM Don L. Keskey 212 E. Grand River Avenue Lansing, MI 48906 dkeskey@clarkhill.com

MICHIGAN RETAILERS ASSOCIATION Stewart A. Binke Dykema Gossett PLLC 124 W. Allegan, Suite 800 Lansing, Michigan 48933-1707 sbinke@dykema.com MPSC STAFF Patricia Barone 6545 Mercantile Way, #15 Lansing, MI 48909 baronep@michigan.gov ENERGY MICHIGAN Eric J. Schneidewind, Esq. Varnum, Riddering & Schmidt 201 N. Washington Square, Ste 810 Lansing, MI 48933 ejschneidewind@varnumlaw.com