Ahhh, I gotcha. The area under the I-70 bridge
is Eagle canyon.
Almost no snow when I was out there. But I was further south and lower elevation and not down in a deeply shaded canyon. Portions of that Eagle canyon trail beneath Swasey cabin probably don't see much sun and I can imagine snow/ice lingering there for a long time.
So... As you are looking at maps, researching etc... Eagle Canyon is the section of trail from Swasey cabin just south of I-70, to the bottom of the canyon just north of I-70. It is the section where you go under the I-70 bridges. From the bottom, going south takes you up to Justensen flats/Copper Globe, going north takes you up Secret Mesa/Eva Connover. From Swasey cabin/Lone Warrior, going north takes you to DRT, going south takes you through Rods valley - from where you have a lot of choices. Going east from Swasey cabin takes you basically back to an I-70 interchange where you can access the main Cottonwood road to the north, or wherever you want to go on the main road heading south.
Since you had a Jackass benches hike towards the end of the intinerary you have fleshed out so far, and asked about Eagle canyon, I just assumed you planned to go down it from Swasey cabin, but had no idea where you intended to go from there. If you plan on heading towards Copper Globe from the bottom of Eagle, then rigs can easily bypass Eagle canyon I-70 and rejoin you at Justensen flats. But if you plan on heading north from the bottom of Eagle, the bypass would be the state or county road shed access off I-70 at the beginning of Eva Connover (assuming bypass rigs don't want to descend from Justensen and climb via Secret Mesa).
Hopefully this is more helpful than confusing. But, re-reading it, I'm not too sure...
- DAA