Replace services to 3416 & 3412 rittenhouse st nw due to proposed roadway drainage improvements. Replace services to 3305 quesada st nw and 60 33rd st (at intersection of 33rd st nw and quesada st nw) due to proposed roadway drainage improvements. Existing street trees within the work zone shall be protected as per ddot standards. Trenching operations shall be conducted so as to avoid injury to tree trunks, branches, and roots. No heavy equipment shall be used to remove existing hardscape within the drip line of the street tree(s). The drip line is defined as the ground area under the canopy of the tree. Excavations within limits of tree root spread shall proceed with care either by use of hand tools or with equipment that will not cause tree root damage. Ddot blue book 207 and 611