Trouble with tricky, vertical topo lines and delaunay mesh

hello,

see attached for my file. i am having trouble creating an accurate mesh/delaunay mesh with this topo. there are manmade elements that create semivertical conditions, as you will be able to see in the file. my current setup, curve → control points → delaunay mesh is creating messy and undesirable results, specifically in that central area with the terraced condition that creates topo that is close to vertical. i am wondering if anyone might be aware of a workaround. thank you.

topo lines.3dm (3.1 MB)