PG&E needed precise as-built alignment and depth data as well as permanent survey control points for Line 300A and 300B corridor. This corridor spans approximately 45 miles, south-southeast of Arvin, California in the vicinity of Tower Line Road and the Arvin-Edison Canal, to a point in the vicinity of Lerdo Highway, west of Shafter, California.
Cannon used GPS to acquire the necessary survey control in two tiers. We then tied the data to two of the best available NGS control monuments supplemented by seven CORS stations using the latest CSRC position data. In the field, Cannon conducted monument reconnaissance and placement, made GPS observations for 20 permanent monuments, and located aboveground markers (AGMs) and ground profile points. Project deliverables included a survey report with final coordinate values published in both CCS, Zone 5 (feet) NAD’83, and UTM Zone 10, NAD’83 (horizontal in meters, vertical in feet NAVD’88); as well CAD mapping exhibiting results of the GPS survey.
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