REMOVE

1. tipis
2. soil
3. hills
4. banks (landforms)
5. 1966

WHAT

1. construction sites (1)
2. cranes (equipment) (1)
3. dams (hydraulic structure … (1)
4. exterior views (1)
5. Grand Coulee Dam (dam) (1)
6. landscapes (representatio … (1)
7. men (male humans) (1)
8. rock (1)
9. scaffolds (1)
10. silver gelatin (1)
11. sky (1)
12. tools (1)
13. towers (single built work … (1)
14. trucks (1)
15. Visual Works (hierarchy n … (1)
16. wood products (1)
17. 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)