Updated 6/22/2019:
How's that INXS song go? "One thing leads to another"? 
OK, so thinking about the hatch lead to my making it into a trapezoid shape. My wife suggested that I make a cardboard hatch template to see if I would fit. Turns out that 24"x13" is the minimum size for me. That prompted me to revisit all the hatches near Weirton Steel. They are marked in light green below.
I am debating the need for the trapezoid hatch. But the 24"x13" hatch under the Blooming Mill seems necessary. Likewise the hatch at the rear of the Open Hearth. And the one in front of the Open Hearth is also required. I have slightly re-positioned the 2 tracks leading into the Blooming Mill as a result of this analysis.
So we are closer, but no blade has yet hit a table top.
More when I know it. 
George
