Out here, a sewer run can stretch a long way across a property, and a trench across one is real excavation, through the land you actually use, past the trees you actually planted, sometimes across the run to your septic system. When a long rural line finally needs more than clearing, a trench gets expensive. That makes lining worth knowing about early. For qualifying lines, the fix happens within the existing pipe, and much of the property above may never see a shovel.
Pipe lining, CIPP, can travel the line from a cleanout or a similar access point. A resin soaked liner presses against the old walls and cures into a new pipe inside them, jointless and structural. On a long Fallbrook run, having no joints matters even more. The serious roots out here, the oaks, the eucalyptus, the grove stock, lose the joints, cracks and loose connections they've been getting into along the lined distance, and the timing on a run this size is something the contractor will set out. The land above can often be left alone.
Lining needs a pipe that still holds its shape, and running a camera along it shows what's there before anything gets proposed. Long lines sometimes qualify entirely, sometimes in sections, and the footage helps lay that out. Then you get the options and tradeoffs in plain English, the decision is yours at your pace, and a licensed contractor performs the work when you say so.