My fav paragraphFor calculation of resources, McDougald and Mehle used guidelines established by the USGS that allow 1,000 feet of projection for every one foot of lignite bed thickness. The average bed thickness of three feet (2-6 foot range) was used by the authors to project 1,000 feet down-dip for the purpose of estimating tonnage. The Geologic Services calculation for the No. 2 bed yields a non 43-101 compliant historical resource of 44.2 million pounds at an average grade of 0.31% U3O8.