Although I generally prefer old style intraurban steel mill sites to modern greenfield facilities Gary, Indiana in the 1960ies must have been the place to be for a steel mill photographer.

Here is the data sheet (1965):

Coke Plant:
497 Koppers ovens
385 Wilputte ovens

Sintering Plant:
5 Strands

Blast Furnaces:
No.1 Ø 6.24 m
No.2 Ø 6.24 m
No.3 Ø 6.24 m
No.4 Ø 8.61 m
No.5 Ø 6.24 m
No.6 Ø 8.53 m
No.7 Ø 8.53 m
No.8 Ø 8.07 m
No.9 Ø 7.01 m
No.10 Ø 8.22 m
No.11 Ø 7.62 m
No.12 Ø 7.62 m

Open Hearth Steel Plants:

24 x 150 t furnaces
14 x 167 t furnaces
6 x   184 t furnaces
4 x 190 t furnaces
2 x 300 t furnaces

Bessemer Plant:

3x 25 t converters

Rolling Mills:

3 x Blooming/Slabbing
1x Billet
1x Rail
1 x Plate
9 x Bar
2 x Strip

Forge:

6x Steam hammers
3 Presses, 1000 t, 2000 t, 10000 t