Nov 9 (Reuters) - NioCorp Developments Ltd NB.TO
* NioCorp signs agreement for natural gas transport to its Elk Creek Superalloy Materials Project
* Niocorp Developments Ltd - NioCorp expects to contract separately for purchase of natural gas to be transported by Rockies Express
* NioCorp Developments Ltd - Value of contract, to be paid over a period of 11 years, is approximately $63 million
* NioCorp Developments Ltd - Signed deal with Rockies Express pipeline to construct and operate a 27.8-mile natural gas pipeline