REMOVE

1. soil
2. roads
3. barriers
4. mountains
5. utility poles
6. hills

WHAT

1. banks (landforms) (1)
2. black-and-white film (1)
3. close-up views (1)
4. construction equipment (1)
5. construction sites (1)
6. cranes (equipment) (1)
7. exterior views (1)
8. Grand Coulee Dam (dam) (1)
9. machinery (1)
10. rock (1)
11. rubbish (1)
12. scaffolds (1)
13. sky (1)
14. towers (single built work … (1)
15. trees (1)
16. 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)