Figure 1 shows the general location of the BX in Situ Oil Shale project. In the central portion of the perchance Creek Basin of northwestern Colorado, there is a section of oil shale bearing rocks in the Parachute Creek member of the Green River Formation commonly referred to as the leached zone which contains very large reserves of oil in place as oil shale. This section of leached zone has enough permeability and porosity to permit in situ retorting of the oil shale contained therein without resorting to mining and/or other fracturing techniques. The purpose of the BX in Situ Oil Shale Project is to demonstrate the technical feasibility of using superheated steam at 1000 Degrees F and 1500 psig as a heat carrying medium to retort oil shale in the leached zone in situ and to provide a mechanism for the recovery of this oil with a minimum impact on the environment. More specifically, the oil shale will be retorted by injecting superheated steam into the leached zone through an array of injection wells and recovering the steam/water/oil and gas produced from the leached zone through an array of production wells.