Kanangra Walls water pipe mystery

Out on Kanangra Walls, within about 50 metres of Kanangra Head, is a 2” water pipe inserted vertically into the rock face, about a metre from the edge.
I took a photograph of the pipe 55 years ago (see photograph), and recently when I was at that location, the pipe is still there.
Does anyone know why it was put there? It would have been quite a lot of work to drill such a large hole.
Someone once suggested it could have been tied up with Charles Chauvel’s filming of Jedda, where the final scene took place at Kanangra Walls.
Any suggestions or ideas would be greatly appreciated.
Regards
Dick Smith
I took a photograph of the pipe 55 years ago (see photograph), and recently when I was at that location, the pipe is still there.
Does anyone know why it was put there? It would have been quite a lot of work to drill such a large hole.
Someone once suggested it could have been tied up with Charles Chauvel’s filming of Jedda, where the final scene took place at Kanangra Walls.
Any suggestions or ideas would be greatly appreciated.
Regards
Dick Smith