 As the unofficial monitors of the bridge, brothers and pledges of DU would paint over offensive messages or messages which did not contain 'THX DU' (for "Thanks Delta Upsilon").In 2011, Beta Theta Pi moved back into their original house next to the bridge, and now messages typically contain 'THX Beta'.The tradition of bridge-painting at the university actually began in 1901 with students painting the railroad bridge crossing over University Avenue at The Corner.