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): (September 19, 2006) CRIMSON EXPLORATION INC. (Exact Name of Registrant as Specified in Charter) Delaware 000-21604 20-3037840 (State or Other Jurisdiction of (Commission File Number) (IRS Employer Incorporation) Identification No.) 480 N. Sam Houston Parkway E., Suite 300, Houston Texas 77060 (Address of Principal Executive Offices) (281) 820-1919 (Registrant's telephone number, including area code) ------------------------------------------------------------------------- Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: [_] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) [_] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) [_] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 14d-2(b)) [_] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) =============================================================================== Item 8.01 Other Events. On September 19, 2006, Crimson Exploration Inc.(the "Company") issued a press release regarding the Company's recent operational activities. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. Item 9.01 Financial Statements and Exhibits. (c) Exhibits ------------------------------------------------------------------------------- Exhibit Number Description ------------------------------------------------------------------------------- Exhibit 99.1 Press Release dated September 19, 2006 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 hereunto duly authorized. CRIMSON EXPLORATION INC. Date: September 21, 2006 /s/ E. Joseph Grady -------------------------------------- E. Joseph Grady Senior Vice President and Chief Financial Officer EXHIBIT INDEX ------------------------------------------------------------------------------- Exhibit Number Description ------------------------------------------------------------------------------- Exhibit 99.1 Press Release dated September 19, 2006