Stand on the Main Street bridge in Kennebunk and you can hear the Mousam pouring over the dam below the old mill buildings, a sound the town has never had to do without. BDM Landscaping, LLC keeps the lawns on the ground above that water — weekly mowing, trimmed edges, fresh mulch in the beds, seed worked into the thin spots. Grass here comes on fast in June and turns stubborn by August, and both moods need answering. The reward is small and exact: a lawn that looks deliberate from the sidewalk, beds holding their shape, nothing shaggy at the fence line. The work runs across Kennebunk and the towns that share the river and the coast road.