Residents of a senior community in east Lodi want to know which agency is responsible for removing downed trees from the Mokelumne River. Joyce and Mike Tracy said the heavy storms that hit Lodi at the beginning of the year caused three trees to fall into the river in March, blocking water flow downstream. As a result, water levels have risen to the top of the riverbank, causing damage to properties in the Casa de Lodi community at 29 Rio Vista Drive.