Section 60.72 - Construction records(a) DOE shall maintain records of construction of the geologic repository operations area in a manner that ensures their useability for future generations in accordance with § 60.51(a)(2) .(b) The records required under paragraph (a) shall include at least the following: (1) Surveys of the underground facility excavations, shafts, and boreholes referenced to readily identifiable surface features or monuments;(2) A description of the materials encountered;(3) Geologic maps and geologic cross sections;(4) Locations and amount of seepage;(5) Details of equipment, methods, progress, and sequence of work;(6) Construction problems;(7) Anomalous conditions encountered;(8) Instrument locations, readings, and analysis;(9) Location and description of structural support systems;(10) Location and description of dewatering systems; and(11) Details, methods of emplacement, and location of seals used.48 FR 28222, June 21, 1983, as amended at 53 FR 19251, May 27, 1988