High Voltage Transmission Line Route Survey; Puget Sound Energy
White Shield provided PSE with a survey of the high voltage transmission line route located in the Sammamish-Clyde Hill, Berrydale-Lea Hill, and Sammamish-Novelty Hill areas of King County, Washington. The route’s length was approximately 82,507 linear feet, or about 15.7 miles. To maximize efficiency White Shield utilized GPS surveying techniques whenever possible and also used RTK GPS for mapping. In areas where GPS was not the best tool, robotic and reflectorless total stations were used to increase the efficiency of data collection. White Shield surveyed the aerial tops of all poles, insulators, distribution cross-arms, and anchors within or crossing the road template, located the trees encumbering the lines within the public ROW, and verified edge of pavement, sidewalks, driveways and ingress/egress to any businesses located along the route. Ground elevations were provided at all existing power line structures along the right of way as well. White Shield located the hi/low point of the lines throughout the route to determine the sag, and recorded the date, time, and temperature to monitor line tension and facilitate design.