Spent some time mentally working my propane line replacement project, including google and Youtube. Sure looks like cutting the concrete may be my choice of last resort.
Several alternatives for going under the concrete, unfortunately I couldn’t find any available locally to rent. Just might have to try the 16ft section by improvising, as I can get access from one side rather easily. Missing the rocks may be my challenge.
I also like the pipe pull using the existing pipe for the broken high pressure line. Using the backhoe to pull cable should work. That pipe should be in a bed of sand, so maybe a reasonable pull. I”ll unearth both ends and give a test tug.
While I’m not about to spend $700 for this tool, it does provide ideas.
Pulling a Service Line With The Service Line Replacement Tool - YouTube