|
|
Sheet steel is used to line harbor walls and the sides of shipping docks. The docks are filled with earth, which would spill into the harbor if the walls fail. |
(MPR Photo/Bob Kelleher)
|
|
|
Sheet steel is used to line harbor walls and the sides of shipping docks. The docks are filled with earth, which would spill into the harbor if the walls fail. |
| ©2009 Minnesota Public Radio : Terms of Use |
