Dobbs Branch Basin Improvements Phase 2

The Project consists of approximately 80,000 feet of cured in place pipe sewer rehabilitation, of which approximately 400 feet is 24-inch, 1,200 feet is 20-inch, 800 feet is 18-inch, 2,000 feet is 15-inch, 3,500 feet is 12-inch, 7,800 feet is 10-inch, 67,000 feet is 8-inch; rehabilitation of approximately 2,400 vertical feet of manholes utilizing cementitious or epoxy lining; reinstatement of service laterals with approximately 1,100 by robotic means; and installation of 60 new 4-foot diameter precast concrete manholes. Approximately 150 feet of 6-inch to 8-inch diameter gravity sewer will be replaced in same trench via open cut. There was no Sanitary Sewer Evaluation Survey performed on this basin prior to design and therefore several additional work items will be required, but will not be known until CCTV is performed such as point repairs, additional same trench replacement, manhole replacement, manhole frame and cover replacement, etc.

Division 03 -	Concrete, Precast Concrete.
Division 33 -	Utilities, Sanitary Sewerage Utilities, Sanitary Utility Sewerage Piping, Sanitary Utility Sewerage Force Mains, Sanitary Utility Sewerage Structures.