Install of 2" plastic service from 4" ci main in street. In roadway at 1521 v st se between 15th st se and 16th st se, permit#129376 wr#906093 attached sketch condition of permit should be one year duration. Trenching operations shall be conducted so as to avoid injury to tree trunks, branches, and roots. 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. Blue book 207 and 611