[en] A compilation of operational and cost data on the 17 emplacement holes completed during Fiscal Year 1978 is presented. The data are summarized in significant categories and the factors which influence drilling cost as an aid to comparison and analysis are indicated. Emplacement holes which were deepened or otherwise recompleted after being reported as complete in prior years are excluded. The emplacement hole data are divided into two drilling phases, site preparation and zero station. Site preparation involves drilling and casing the surface hole to approximately 120 feet. Zero station drilling is from the bottom of the surface hole to total depth and includes such non-drilling operations as logging, sidewall sampling and gathering other geologic data for containment evaluation. The cost of casing and lining is charged to zero station work orders where applicable. Cost per foot data are compared between users and fiscal years where a basis for comparison exists