Re: Structure Lesson 301: What is it?
This is the old highway and the Bridge Pilings hold up the new Bridge. What's unique is the Concrete Box Culvert under the road way and you can see where the material has eroded some on the left side or downstream side. There are three small ledges that appear. The two crisp white ones are where the sonar hit it directly returning a strong signal. The Dark on is where the absence of sonar is for going over the drop and creates a defined shadow. Also neat how you can see the concrete pavement, rocks/gravel on the shoulders and then the base. On left side it's built up on the top right the hill has been excavated to flatten the roadway.
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