REMOVE

1. hills
2. machinery
3. fences
4. barriers
5. soil
6. cranes (equipment)

WHAT

1. banks (landforms) (1)
2. black-and-white film (1)
3. bridges (built works) (1)
4. buildings (structures) (1)
5. construction equipment (1)
6. construction sites (1)
7. Grand Coulee Dam (dam) (1)
8. landscapes (representatio … (1)
9. mountains (1)
10. paths (1)
11. rivers (1)
12. roads (1)
13. rock (1)
14. rubbish (1)
15. scaffolds (1)
16. sheds (storage structures … (1)
17. sky (1)
18. valleys (landforms) (1)
19. Visual Works (hierarchy n … (1)
20. wood products (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. ca. 1936 - 1937 (1)