SCH Number 2020019083

Project Info

Title

Phase 1 Sewer Line Replacement Project

Description

The proposed project includes upsizing and/or replacing approximately 5,446 linear feet of deteriorating sewer line described below as two separate segments: (1) the East Trunk segment which encompasses the southern portion of the proposed project; and (2) the Vallecito Road segment which encompasses the northern portion of the proposed project. An aerial view of the proposed project segments and surrounding area is depicted on Figure 3, below. Construction methods to upsize and/or replace the existing sewer line include the following: • Remove and replace. The traditional dig-up-and-replace method would require excavating a long, deep trench or trenches to remove the old pipe and install new pipe in its place; • Pipe bursting. A pipe replacement method involving bursting the existing pipe through brittle fracture and pulling a new pipe of the same or larger size through the old fractured pipe from within. This construction method would require digging trenches (approximately 4 feet deep and 4 feet wide) at the pipe insertion point at various locations throughout the area planned for pipe bursting; • Cured-in-place pipe (CIPP) liner. A trenchless pipe rehabilitation method that involves inserting and running a felt lining into a pre-existing pipe that is the subject of repair. Resin within the liner is then exposed to a curing element to make it attach to the inner walls of the pipe, and once fully cured, the lining acts as a new pipeline; See NOC for full details.

2 documents in project