UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 10, 2004 AMERICAN ECOLOGY CORPORATION (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER) DELAWARE 0-11688 95-3889638 -------- ------- ---------- (State or other jurisdiction of (Commission (I.R.S. Employer incorporation or organization) File Number) Identification Number) Lakepointe Centre I, 300 E. Mallard, Suite 300 83706 Boise, Idaho ----- (Address of principal executive offices) (Zip Code) (208) 331-8400 -------------- (Registrant's telephone number, including area code) 1 ITEM 2.06 MATERIAL IMPAIRMENTS On December 10, 2004 the Company issued a press release titled "AMERICAN ECOLOGY INCREASES SHEFFIELD, ILLINOIS CLOSURE, POST-CLOSURE RESERVE" disclosing that a $715,000 charge would be recorded in the Fourth Quarter. A copy of the press release is attached as exhibit 99 and incorporated by reference herein. Exhibit 99 Press Release, dated December 10, 2004, entitled "AMERICAN ECOLOGY INCREASES SHEFFIELD, ILLINOIS CLOSURE, POST-CLOSURE RESERVE" 2 SIGNATURES ---------- Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. AMERICAN ECOLOGY CORPORATION (Registrant) Date: December 10, 2004 By:/S/ James R. Baumgardner ------------------------ James R. Baumgardner Senior Vice President, Chief Financial Officer, Secretary and Treasurer 3 EXHIBIT INDEX Exhibit Description ------- ----------- Exhibit 99 Press Release, dated December 10, 2004, entitled "AMERICAN ECOLOGY INCREASES SHEFFIELD, ILLINOIS CLOSURE, POST-CLOSURE RESERVE" 4