Here is the full list of all 27 Bridges & Docks achievements.
Place 10 Blocks
Place 1000 Blocks
Place 10000 Blocks
Place 50000 Blocks
Place 50 Sheep
Place 50 Houses
Place 5 Bridges
Place 50 Bridges
Place 200 Bridges
Place a Bridge 15 Blocks High
Generate An Island With 300 Trees
Generate An Island With 15 Bridges
Maximize Fish Quantity
Take 10 Screenshots
Use The Undo Button 100 Times
Rotate An Object 5 Times In Under 2 Seconds
Overwrite a Save File
Generate An Island With 100 Houses
Place 50 Rocks
Hit The Generate Button 1 Times
Hit The Generate Button 50 Times
Place Grass 100 Times
Place Every Kind Of Animal
Use The Undo Button 5000 Times
Generate an island with no land
Max out every slider
Change Color Palette 20 Times