Thanks TO Double D, the answer to our original question is in the document you linked. The natural gas line will be coming from Kansas, not Odell.
Under the agreement, following the receipt of financing for the project, Rockies Express has agreed to design, construct, and operate a natural gas lateral line that will extend from the Rockies Express main line in Marshall County, Kansas to the Elk Creek Facility and will deliver at least 27,500 MMBTU (Million British Thermal Units) of natural gas per day when the Elk Creek Facility is fully operational. The value of the contract, to be paid over a period of 11 years, is approximately $63 million. NioCorp expects to contract separately for the purchase of the natural gas to be transported by Rockies Express.