Blaumilch Canal (international release title: The Big Dig) is a 1969 Israeli comedy satire written and directed by Ephraim Kishon, depicting the madness of bureaucracy through a municipality's reaction to the actions of a lunatic. The film is based on a humorous story titled "A Legend About a Canal in Tel Aviv" by Kishon, first published in 1952 and later included in the book A Thousand and One Kids.

The film achieved commercial success and critical acclaim, winning the Best Foreign Film award at the Barcelona Film Festival and the Jury Prize at the Monte Carlo Film Festival, and was also nominated for a Golden Globe Award.