Weird question. I've noticed this for years and always wondered what is was for.

There is a section of grass between whitemud dr and mill woods golf course that gets irrigated on a regular basis for some reason. The sprinklers are not on the golf course and it's not part of the golf course. Just random prairie grasses.
And then in winter they plow a section of the median between the two directions of whitemud in that same area. Nothing there, they just scrape the snow off down to the grass on the median.
What for?

The only thing that comes to mind is maybe a pipeline below? But even that seems odd.