REMOVE

1. trucks
2. scaffolds
3. dams (hydraulic structures)

WHAT

1. banks (landforms) (1)
2. construction sites (1)
3. cranes (equipment) (1)
4. exterior views (1)
5. Grand Coulee Dam (dam) (1)
6. landscapes (representatio … (1)
7. men (male humans) (1)
8. rock (1)
9. silver gelatin (1)
10. sky (1)
11. tools (1)
12. towers (single built work … (1)
13. Visual Works (hierarchy n … (1)
14. wood products (1)
15. workers (1)

WHERE

1. Grand Coulee, Washington (1)

WHO

1. Clyfford Still; Still, Cl … (1)
2. Still, Clyfford (1)

WHEN

1. 1936 (1)
2. 1937 (1)
3. circa 1936 to 1937 (1)