i ’ m going for a swim . he said he had not seen any signs saying that it was prohibited the sun news syndication a fork - lift truck driver on a stag do in las vegas is believed to have become the first person to swim across the hoover dam and live to tell the tale — and pay the fine . aaron hughes is thought to be the first person to survive the swim across the reservoir at the 221 m - tall ( 726 ft ) structure , which is on the border of arizona and nevada . arron hughes from ruthin in north wales had no idea he was risking his life when he leapt into the colorado river to cool off . arron hughes , 28 , of park road ruthin , was on a stag do with pals when he jumped into the water below the 725 ft - high structure while on a 37 hour bender . i got to arron hughes swam from arizona to nevada on august 8 . after his … aaron hughes is told he escaped being dragged under only because nine of the 10 turbines were not in operation a british man has been fined for swimming across the colorado river at the hoover dam reservoir in the united states . he told the daily post : “ it was around 45 - 50 degrees outside and we were on a stag do in vegas to have fun , do n’t you ? the 28 - year - old was told he escaped being dragged under only because nine of the 10 hydroelectric turbines were not in operation at the time .