Project contingency accounts for additional costs during construction. For example, an unforeseen postal error may delay project permit issuance or a bit may twist-off during well drilling, both incurring additional expense that would have otherwise been unbudgeted. As a result, all capital costs must have a non-zero project contingency attached to them. GETEM, GEOPHIRES, and NETL (2012) assume 15% project contingency ( ), thus we assume the same in genGEO (i.e.