| 535 | 97 | 10-31-2011 | 85251 | UNNAMED | NBRR | Approves the request for an order establishing 30 approximate 640 acre drilling and spacing units for lands in Townships 4 and 5 South, and Ranges 64 and 65 West, 6th P.M., Arapahoe County, for the production of oil, gas, and associated hydrocarbons from the Niobrara Formation. |
| 535 | 422 | 09-16-2013 | 85251 | UNNAMED | NBRR | Approves the request for an order to vacate two approximate 640-acre drilling and spacing units established by Order No. 535-97 for Sections 21 and 22, Township 4 South, Range 65 West, 6th P.M.; and establish an approximate 1280-acre exploratory drilling and spacing unit and approve up to two horizontal wells within the unit for Sections 21 and 22, Township 4 South, Range 65 West, 6th P.M., for the production of oil, gas and associated hydrocarbons from the Niobrara Formation. |
| 535 | 431 | 10-28-2013 | 85251 | UNNAMED | NBRR | Approves the request for an order to pool all interests in an approximate 1280-acre exploratory drilling and spacing unit established for Sections 21 and 22, Township 4 South, Range 65 West, 6th P.M., for the development and operation of the Niobrara Formation. |
| 535 | 1342 | 01-06-2021 | 85251 | UNNAMED | NBRR | Among other things approves an order to amended Order No. 535-422 to approve an additional six horizontal wells, for a total of up to eight horizontal wells within the unit, pursuant to the findings above. |