Keney Park runs green and enormous through Hartford's north end, and the streets around Blue Hills Avenue take their cues from it. NORTHEAST LAWN & SNOW LLC lives inside its own name: mowing, trimming and seasonal cleanups from the first flush of April, then plowing, shoveling and salting once a nor'easter parks itself over the valley. A crisp edge along a walk in August and a bare black driveway in February are the same act of respect. Storms here rarely announce the exact hour, so the truck is loaded before the sky changes. The point is that the morning goes normally for everyone else.