Down in the wooded ravine of Rock Glen, where Mason City's Prairie School houses sit low against the hillside the way Frank Lloyd Wright's downtown Park Inn Hotel sits low against its own street, the trees hold snow in their branches longer than anywhere else in town, sheltered from the wind that scours the open blocks nearby. Bryant Tree Service works those shaded driveways carefully, clearing snow that's often wetter and heavier for having sat under cover, and checking overhead for limbs that didn't hold through the last storm. From the ravine the crew moves out to the flatter streets, where wind-packed snow behaves differently and clears in cleaner sheets off the blade. There's something almost architectural about doing this work in a neighborhood built with so much attention to how a house meets its ground — a driveway cleared square and clean fits right into that same logic. By midmorning the ravine's narrow streets are open again, quiet under trees still holding the last of the storm.