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Topic
- Water-power 18
- Hydroelectric power plants 12
- Dams 8
- Rivers 4
- Spillways 4
- Water mills 3
- Cranes, derricks, etc 2
- Bridges 1
- Covered bridges 1
- Diversion structures (Hydraulic engineering) 1
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Rights
- In Copyright 18
Format
- image/tiff 18
Decade
- 1880-1889 18