Noble Energy Inc. plans to close Rosetta Resources Inc.’s headquarters in downtown Houston when the $2.1 billion merger announced last May closes this summer (see Shale Daily, May 11). According to a Worker Adjustment and Retraining Notification (WARN) letter sent to the Texas Workforce Commission, the deal is expected to close on July 20. The WARN letter said the merger will affect 306 jobs. According to reports, 11 executives at Rosetta will be resigning, 65 will be permanently laid off and the remaining 230 will be transferred to Noble’s headquarters in northwest Houston.