Ray Bourque's blood alcohol level was more than 3 TIMES the legal limit when the Boston Bruins legend was arrested for drunk driving this weekend ... this according to the police report.
55-year-old Bourque -- considered one of the greatest defensemen of all time -- was arrested in Andover, Mass. on Friday night after allegedly rear-ending a mini-van at 11:30 PM.
Cops arrived to the scene and arrested Bourque. During the incident, cops say the NHL great admitted to "having a few drinks" at the Andover Country Club.
Bourque appeared in court earlier today and plead not guilty to OUI -- operating under the influence.