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Quote: "Wow, that's an odd setup. I don't understand what it solves"

Agreed. DPS had a much bigger version of a "berm cover" at their old range off Lamar - only it was constructed of heavy lumber and not exposed steel perpendicular to the shooters. What the cover "solves" is keeping the surface(s) of the berm from washing away.

Oh I see the "heavy corrugated panels" alright. But, it takes some support (in pre-engineered metal buildings, they are called "purlins") for them. And that looks to me like heavy metal pipe supporting the "roof panels" and tires.

We "mine" the bullets out of our berm about once a year to prevent buildup near the surface. It's hard to see what is directly behind the target stands in that photo, but that appears to me to be heavy metal pipes above them - perpendicular to the shooters?