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13. Asset Retirement Obligation: Schedule of Asset Retirement Obligations (Details) - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Details    
Balance at beginning of period $ 154,292 $ 121,560
Asset Retirement Obligation, Period Increase (Decrease) 2,218 4,013
Asset Retirement Obligation, Liabilities Incurred 0 10,771
Asset Retirement Obligation $ 156,510 $ 136,344