I was surprised to see this three year old post resurface considering that CO NG is the focus here. Thanks for the added details, comments and photos of other interesting artifacts in the area. I'll add a note to the original post to clarify that the hike that I detailed isn't necessarily on the AMB grade. Hopefully I'll get back up there in the spring to do some more exploring. I'd also like to check out the wye down in the valley that is visible from the air with low lake levels.
My maps use the Bing map interface and there is no separate file for the route as it is baked into the web page. As I do more exploring I can improve the accuracy since some segments may not be exactly on the grade but will get you in the general area.
I've been in AZ for a long time but I'm a little too young to have seen any operating steam other than when the GC line was opened back up. I could have caught some as a kid up at McNary or over by Superior but we didn't get too many family outings far from home. McCormick Ranch and one trip to Legend City were my only steam experiences until I was old enough to get out on my own.
Some of my other favorites in AZ:
The SFP&P grade in Limestone Canyon trying to picture the massive wood trestles that used to stand there
SFP&P Map SFP&P Adventures
The long forgotten NG Magma grade for the closeness factor and the obscure grade -
Magma AZ exploration
The NG Morenci Southern with 2.5 bridges still standing and a couple of tunnels that you can walk through
Morenci Southern Map
The NG UV&P, yes it is mostly under a road but there are bypassed trestle sites, old metal drain pipes, hints of telegraph lines and stone culverts left behind and views of red rock country and the SF Peaks
United Verde Map UVP&P Exploration
The tunnel along the A&P that I eventually got to visit
Johnson Canyon Tunnel Map
Dave