When Senior Park Ranger Maureen Beckman started patrolling Carbon Canyon Regional Park about five years ago, there was one thing she heard most often: Don’t be the ranger who kills the redwoods. Tucked into the south end of the park about a mile’s hike from the nearest parking lot is a three-acre grove of 242 coastal redwood trees – the tallest standing about 100 feet. Nearly two years ago, with California in a severe drought and water rationed by local governments, the thirsty redwood trees were in peril.