Is $16,000 to epoxy lining for water main a fair price?

This quote is for a two-phase repair of old sewer pipes, including descale/rejuvenation and epoxy coating/full restoration of the mainline sewer. - Phase 1: Mainline sewer descale/rejuvenation - Phase 2: Mainline epoxy coating/full restoration

The initial scope was to replace the old cast iron sewer line and install double clean outs between the house and the city sewer. After excavation, the contractor decided against full replacement due to foundation concerns and proposed shooting a liner through the pipe instead. However, the contractor ultimately applied epoxy to the sewer pipe. - Work performed: Application of epoxy to the sewer pipe- Coverage: A layer of epoxy was applied only to the bottom (flow line) of the pipe- Coverage missing: No epoxy covering the top of the pipe- Contractor's claim: This partial lining is sufficient as long as the flow line has a new lining

This quote is for lining 65 feet of drain pipe. The drain pipe inside the house is steel, and the outside portion is terracotta. The leak is confirmed to be inside the house. A sewer scope inspection indicated that the pipe is not collapsed and is suitable for lining. - Length of pipe: 65 feet - Pipe material (inside): Steel - Pipe material (outside): Terracotta - Leak location: Inside the house - Condition: Not collapsed, suitable for lining