| 118416 | Facilities | 383549 | Earthen Pit Report/Permit and Attachments | 85199 | 4/19/1983 | Download |
| 118416 | Facilities | 383550 | Notice from COGCC to Impact Energy-Pit in need of repairs | 26352 | 9/13/2004 | Download |
| 118416 | Facilities | 383551 | Letter from Impact Energy to COGCC re Notice | 36174 | 10/11/1984 | Download |
| 118416 | Facilities | 383552 | Pit Inspection Form | 38541 | 6/23/1986 | Download |