[Code of Federal Regulations] [Title 36, Volume 2] [Revised as of July 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 36CFR228.49] [Page 150] TITLE 36--PARKS, FORESTS, AND PUBLIC PROPERTY CHAPTER II--FOREST SERVICE, DEPARTMENT OF AGRICULTURE PART 228_MINERALS--Table of Contents Subpart C_Disposal of Mineral Materials Sec. 228.49 Reappraisal. If an extension of time is granted as provided in Sec. 228.53(b), the authorized officer must reappraise or reestimate the mineral materials covered by the contract or permit and which remain unexcavated at the time of extension. The recalculated unit value becomes the new unit value for the remaining unexcavated material; excavated and stockpiled material is not subject to reappraisal.