REMOVE

1. rubbish
2. roads
3. sheds (storage structures)
4. barriers

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. cranes (equipment) (1)
8. fences (1)
9. Grand Coulee Dam (dam) (1)
10. hills (1)
11. landscapes (representatio … (1)
12. machinery (1)
13. mountains (1)
14. paths (1)
15. rivers (1)
16. rock (1)
17. scaffolds (1)
18. sky (1)
19. soil (1)
20. valleys (landforms) (1)
21. Visual Works (hierarchy n … (1)
22. 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)