Condensed Balance Sheets (USD $)	Mar. 31, 2014	Dec. 31, 2013
CURRENT ASSETS
Cash and cash equivalents	$ 1,084,596	$ 712,197
United States Treasury securities	8,243,190	5,468,675
Royalties receivable	4,032,700	4,448,907
Prepaid expenses	78,111	2,110
TOTAL CURRENT ASSETS	13,438,597	10,631,889
NONCURRENT ASSETS
United States Treasury securities		2,883,251
Prepaid pension costs	475,389	587,159
NONCURRENT ASSETS	475,389	3,470,410
PROPERTIES
Mineral and surface lands	39,479,708	39,479,708
Accumulated depletion and amortization	(38,766,577)	(38,592,577)
Mineral and surface lands, net	713,131	887,131
Building and equipment	335,767	335,767
Accumulated depreciation	(277,727)	(263,965)
Building and equipment, net	58,040	71,802
TOTAL PROPERTIES	771,171	958,933
TOTAL ASSETS	14,685,157	15,061,232
CURRENT LIABILITIES
Accounts payable and accrued expenses	115,156	92,356
Distributions	3,375,000	3,975,000
TOTAL CURRENT LIABILITIES	3,490,156	4,067,356
NONCURRENT LIABILITIES
Deferred compensation	244,300	244,300
TOTAL LIABILITIES	3,734,456	4,311,656
BENEFICIARIES' EQUITY
Certificate holders' equity, represented by 1,500,000 certificates (shares or units) of beneficial interest authorized and outstanding, and the reversionary interest	11,808,245	11,611,487
Accumulated other comprehensive loss	(857,544)	(861,911)
TOTAL BENEFICIARIES' EQUITY	10,950,701	10,749,576
TOTAL LIABILITIES AND BENEFICIARIES' EQUITY	$ 14,685,157	$ 15,061,232