The final segment of the Pure Water pipeline is being installed underwater at the Miramar Reservoir. San Diego’s Pure Water project will supply half of the city’s drinking water by 2035. The city says this is the last segment of the pipeline that will carry purified water from the North City Pure Water Facility through eight miles of pipeline to the reservoir. Crews have already tunneled more than 1,000 feet and now work is underway to finish building the pipeline.