DIY & Home Improvement

OK, well if you are going to continue with that I used to use my old tile saw to cut bricks every so now and again. cinder blocks and so fourth.

Home depot carry's those tile blades 7 1/4 inch. Should cost about $10.00 there abouts.

That might do it.

If you can score it deep enough -you may be be able to break it with your hammer without running the risk of a crack running wild.

I am only suggesting this because you indicated the area you are cutting is the concrete run off.
You discovered on the other end where the ground is more or less level that the slab is most likely 4 inch's in depth.

Where it tappers down to 2 inch's is what is called the run off in concrete terms.

Good luck and be careful with that skill saw. If somebody is with you when doing the cut- a can of wd40 spraying where you are cutting in front of the blade will reduce the sparks flying somewhat. You don't want to use water around your sidewinder- skill saw.

And of course let me know how it goes. !