silo warrior wrote:Looking at the top of the access portal and top of Control Center it looks to me to be between ten to twelve foot below grade. I always thought 1-4 did not have as much fill over the Control Center as the other sites. I am sure that they watched that real close and made sure the contractor placed the proper amount of back fill over every site.
I was on my way back to Phoenix from a job in Midland Texas I stopped by 1-4 and shot the grade from the top of the Control Center to where the grade would have been on the access portal. I got 8ft. 6 in. from the top of Control Center to Access portal. 1-4 was pretty level so I think that they more than likely placed 8 ft. of fill over the Control Center. I took a couple of pictures of the Control Center and Access Portal if I can get them to load I will post them here. If I remember right the site was level but did start to slope off to the west into a small draw.