Using friendship-based community organizing and principles of permaculture, gift economy, and mutual aid, Food Not Lawns has been turning yards into gardens and neighborhoods into communities since 1999, when we were conceived by the Food Not Bombs family in Eugene, Oregon. For more than twenty years small, self-organized groups of grassroots gardeners have been organizing local seed swaps, joining together for garden work parties, and making lots of friends while learning more about the simple act of growing food can radically improve your home, your community, and your life.
You got an interesting grass species if it goes 6in deep. Most grass root systems are closer to the surface.
I’d say trim it until you get a decent rain like the other poster mentions.
Cardboard or tarp on top when the snow melts can reduce how much grows underneath before you start planting in spring/summer.
It’s a nasty species whatever it is. We have to burrow with our hands to pull out the roots. They appear to send runners, like mint or bamboo. We’re thinking of trying a sod cutter next.
We’re trying to keep the plastic to a minimum, though that’s likely a losing battle.