A gas leak on private land was responsible for a mysterious bubbling puddle next to the Trans-Canada Highway west of Calgary.
Rocky View fire crews responded to the site on Sunday.
They found a patch of oozing, bubbling mud between the highway and fence line on the north side of Highway 1, about 500 metres west of Jumping Pound Road.
A leaking gas line was to blame.
Fire officials say there was no risk of an explosion or air contamination. The pipeline was shutdown as a precaution.
Alberta Agriculture licenses the line and says it is now repaired. Officials plan to inspect the repair.
The gas line is owned by a farmer who obtained the rights to tap low-pressure gas from a non-producing well on his land.
The well was drilled in 1929.
There are between 50 and 100 similar private wells in operation in Alberta.
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