| 117554 | Facilities | 696527 | Letter from COGCC to Kirkwood & Joeckel | 36108 | 8/17/1978 | Download |
| 117554 | Facilities | 696523 | Earthen Pit Permit | 43075 | 10/27/1971 | Download |
| 117554 | Facilities | 1426195 | Letter from William Kirkwood to COGCC | 23088 | 2/14/1979 | Download |
| 117554 | Facilities | 2087457 | Pit Evaluation Form | 1647288 | 6/10/2019 | Download |