Program Delivery Plan

SECTION 3. SOUTH BASIN PROJECTS
3.1 South Gravity System Comprehensive Rehabilitation
Projects
3.1.1 SGC-R-0001a, SCG-R-001b, SGC-R-0002a, SGC-R-0002b, SGC-R-0003, SGC-
R-0004, SGL-R-0001, SGL-R-0002, SGL-R-0003, SGU-R-0001, SGU-R-0002,
SGU-R-0003
Project Description
The sanitary sewer system comprehensive rehabilitation projects consist of improvements to
various components of the collection system to reduce the amount of I/I that enter into the
system.
Purpose
The purpose of comprehensive sewer rehabilitation is to correct defects in the system such
as offset pipe joints, collapsed pipe sections, leaking manholes, and direct inflow sources.
The water that enters the system through the defects is a major contributor to sanitary sewer
overflows. Comprehensive rehabilitation of the collection system will contribute to
alleviating sanitary sewer overflows by reducing infiltration and inflow.
Location
There are 12 projects located primarily within the South Gravity Basin. The locations of the
projects are shown on the maps following this section (Figures 3-3 through 3-12).
Scope of Project
The first phase of comprehensive rehabilitation projects will be the physical inspection of
the pipes and manholes including closed circuit television (CCTV) inspection of all pipes.
Smoke testing will also be included in the physical inspection phase.
The data collected by the physical inspection contractor will be analyzed and, based on that
analysis, a listing of recommended repairs with associated construction costs will be
generated.
An engineering firm will then complete preparation of construction documents for project
bidding.
The construction of comprehensive rehabilitation projects will typically include the
following components.
Replacement of pipes
Point repair of pipes
Rehabilitation of pipes by cured in place liners
Rehabilitation or replacement of sewer manholes
Repair of sewer laterals to the property line
Cost
The estimated construction cost for each project is presented in Table 3-1. These costs are
based on preliminary estimates of the amounts of each component of the system that will
require repair or replacement. During the physical inspection phase, the actual condition of
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