| 407 | 87 | 02-19-1992 | | | CODL, NB-CD, NBRR | Approves the request to establish spacing for the Niobrara Formation for certain lands previously spaced for the Codell Formation and to allow the downhole commingling of production from the Codell and Niobrara Formations. |
| 407 | 621 | 04-16-2012 | | | NB-CD | Approves the request for an order to pool all interests in an approximate 160-acre designated wellbore spacing unit consisting of certain lands in Sections 2 and 11, Township 6 North, Range 66 West, 6th P.M., for the Leffler 2TD Well (API No. 05-123-31969) and any subsequent well drilled in the wellbore spacing unit, for the development and operation of the Codell and Niobrara Formations. |