The loan, which is available upto 1 January 2016, complements the $1m facility announced on 26 March 2013 and $300,000 facility entered into and announced on 24 March 2014. It bears interest at the London Interbank Offered Rate.
The company plans to use the proceeds for its operating and tenure expenditures to advance Mtonya.
Uranium Resources managing director Alex Gostevskikh said: "The board remains optimistic about the potential of its Mtonya uranium deposit despite the depressed uranium market and we are encouraged by the continued support from our strategic investor Estes.
"With a maiden resource based on less than 10% of the prospective ground on the Mtonya illustrating significant upside potential, and proof-of-concept mineralogy studies completed, we believe we have a regional mineralised roll-front feature that can be developed through in-situ recovery, the most cost-effective and environmentally acceptable method of uranium extraction."
Estes currently does not intend to seek repayments of the previous loan facilities, the company said.
Mtonya project is said to host a maiden inferred resource of 3.6 million ton ore containing two million lb U3O8 grading 255ppm U3O8.
