Cost indexes for refinery construction, equipment, labor, and operations from Oil & Gas Journal quarterly (first week of Jan, April, July, & October). 2 Jan 2017 issue had it on p. 60.
Chemical Engineering Plant Cost Index
(CEPCI) is located in Chemical Engineering it also includes Economic Indicators, and Current Business Indicators. Use search box to seach this journal and "economic indicators." Or browse to the most recent issue and view the last article.
Summary of statistics on the social, political, and economic organization of the United States. Sources of data include the Census Bureau, Bureau of Labor Statistics, Bureau of Economic Analysis, and many other Federal agencies.