American Dam - Coffer-dam and piers; view from west side of ...

American Canal - Work in progress; view south. Photo taken on ...

American Dam - View from southeast. Photo taken on March 20, ...

American Canal - Excavating inlet. Photo taken on March 29, 1937 ...

American Dam - Setting first forms, Pier No. 9. Photo taken on ...

American Dam - Forms for piers #8 & 9 in place. Pouring floor in ...

American Dam - First pour into forms. Piers No. 7, 8, & 9. Mixer ...

American Dam - Insley Skimmer excavating for Rip Rap, Unit 2. ...

American Dam - Insley Skimmer excavating for Rip Rap, Unit 2. ...

American Dam - Setting Well-points, south end of Unit 1. Photo ...

American Dam - Placing Bonded Rip Rap, Unit 3. Photo taken on ...

American Dam - Placing Bonded Rip Rap, Units 2 and 3. Photo ...

American Dam - Placing Bonded Rip Rap, Units 2 and 3. Photo ...

American Dam - Placing Bonded Rip Rap, Unit 2. Photo taken on ...

American Dam - Piers No. 4, 5, and 6 ready to pour; survey party ...

American Dam - View from west end of foot-bridge. Photo taken on ...

American Canal Inlet - Moretrench well-points. Photo taken on ...

American Canal Inlet - Moretrench Wellpoints in inlet area. ...

April 19 1937, More Trench at well point, inlet area American ...

April 19 1937, American Dam pouring pier at No. 4,5,6 mixer at ...

April 19 1937, American Dam sewer manhole construction at No.1 ...

April 21 1937, American Dam concrete entering floor slab W1/2 of ...

April 21 1937, American Dam concrete entering floor slab W1/2 of ...