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.

Blaumilch is a lunatic with a digging compulsion who escapes from an insane asylum by hiding in the back of a truck that delivers milk to the institution.

Stealing a jackhammer and compressor, he proceeds to dig up one of Tel Aviv's busiest traffic arteries, at the junctions of Allenby, Ben Yehuda and Pinsker Streets, in front of the iconic Mugrabi Cinema.

To speed up the work, so that it can be completed before the upcoming municipal elections, the city sends armies of construction workers and heavy equipment to help the lone jackhammer operator, turning a mere annoyance into a full-blown disaster.