Broadway catches the wind that comes off the water, and on a January morning the storefront sidewalks glaze over before anyone has unlocked a door. LVM Services LLC works ahead of that — plowing lots, clearing entries, laying salt down where a customer will put a foot first. A river town's snow is rarely simple; it arrives wet, it packs under tires, it refreezes at three in the morning under a clear sky. Getting a business open on time after eight inches is the whole ambition, and it is a good one to have. Snow removal for Alton and the towns along the river.