REMOVE

1. rivers
2. machinery
3. railroads
4. construction sites
5. soil

WHAT

1. banks (landforms) (1)
2. black-and-white film (1)
3. buildings (structures) (1)
4. bushes (1)
5. construction equipment (1)
6. cranes (equipment) (1)
7. exterior views (1)
8. Grand Coulee Dam (dam) (1)
9. hills (1)
10. landscapes (representatio … (1)
11. mountains (1)
12. rails (transit system ele … (1)
13. rock (1)
14. rubbish (1)
15. scaffolds (1)
16. sheds (storage structures … (1)
17. signs (declatory or adver … (1)
18. sky (1)
19. towers (single built work … (1)
20. trees (1)
21. trucks (1)
22. Visual Works (hierarchy n … (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)