 In 1978, sales exceeded $61,692 (USD).NYHRMC operated an underground mine on the El Dorado property, 65 km east of San Salvador, from 1948 to 1953, producing approximately 270,000 tonnes of ore yielding about 72,500 troy ounces (2,250 kilograms) of gold at an average grade of 9.7 g/t from workings centered on the Minita vein system (one of a large number of gold-bearing veins and vein systems identified on the El Dorado project).Gold was recovered in a simple cyanide mill and recoveries in excess of 90% were achieved.