WASHINGTON, D.C. - A mining company's amendment of its employee bonus plan in response to its employees' union's decision to call "memorial period" work stoppages constituted an unfair labor practice, a split District of Columbia Circuit U.S. Court of Appeals panel ruled July 3 (Chevron Mining, Inc., formerly known as The Pittsburgh & Midway Coal Mining Company v. National Labor Relations Board, No. 10-1382, D.C. Cir.; 2012 U.S. App. LEXIS 13523).