March 7 – On this day in Montana History in 1962 the Billings Gazette reported that a series of explosions linked two separate drill holes together creating 850 feet of diversion tunnel and 1,235 feet of spillway tunnel to make one tunnel that included an 80-degree turn for the Yellowtail Dam project in eastern Montana. “Engineering was so accurate you could not see where the blast which linked the two holes occurred,” the paper reported. “It was quite an engineering feat.”