Discount apparel cataloger Sierra Trading Post plans to break ground on a 284,000-sq.-ft. fulfillment center at its Cheyenne, WY, headquarters on May 22. The expansion is the cataloger’s second in four years. In 1999, the company built a 157,000-sq.-ft. warehouse. In addition, in 2000, Sierra Trading built a third store in Cody, WY, and added a call center. And this June, the company plans to double the size of its Reno, NV, store.