109th out of 178
49th out of 104
Kiewit's annual coal production prior to 1987 is estimated based on an historical total reported by the company. While annual totals may have varied slightly over the years, the company’s total production since 1944 is accurate.
Coal rank data is not reported. Kiewit’s coal rank split is therefore estimated based on data from the company, the National Mining Association's Coal Producer Surveys, and Keystone Coal Industry Annuals. See the methodology for more details on coal rank categorization.
