Here are a few wordcraft observations, minor stuff:
“It was my first teenage summer, life’s first great transition”
Any way to avoid using ‘first’ twice?
“Sinuous heat ribbons shimmered over the motionless freight cars, subtly defining their rusty shapes like so many slumbering beasts.”
This sentence goes off the rails just a little. It sounds as if the sinuous heat ribbons are like slumbering beasts. And I’m not sure how heat waves define subtly.
“I was already sitting”
Don’t see why ‘already’. Is it early to be sitting there? Same with “already turning gray”. If he’s middle-aged, gray would seem normal. (I understand there was some discussion of the hair already). Also, “The maple…was already a beautiful golden color…” You said the leaves were turning, so it seems normal that the leaves were golden. Could just cut that ‘already’.
“He worked, unofficially of course, since he was underage, with his uncle at Barczak Cement.”
Bothers me a little to have the ‘of course’ before the reason for the ‘of course’. This might be better as two sentences.
Aside from those details (probably already mentioned by others): I do want to know what the deal is with Albert. You have me wondering. Hope you’ll post more. That makes this successful writing