In ArcMap 10.6, I have a parcels layer and a sewage lines geometric network for a small town. Many of the parcels are still undeveloped. In an effort to accurately assess them for tax purposes, their distance to existing "main" lines affects their value (further from main line = less valuable since connecting parcel to main lines costs a lot).
I need to find distance for each parcel to nearest existing main line along geometric network. In attached image, I need to calculate the distance following the path of the blue line, which follows the route along future mains until it hits existing main. I know that if I did a spatial join of parcels to nearest existing line, it would do so like the red dashed line, which is not what I want.