Program Delivery Plan

SECTION 5. NORTH BASIN PROJECTS
5.3 North Forced System Comprehensive Rehabilitation
Projects
5.3.1 NFW-R-0001, NFW-R-0002, and NFE-R-0001
Project Description
The sanitary sewer system comprehensive rehabilitation projects consist of improvements to
various components of the sewer collection system to reduce the amount of rainwater and
groundwater that leak into the system.
Purpose
The purpose of the 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 SSOs.
Comprehensive rehabilitation of the collection system will contribute to alleviating SSOs.
Location
There are four projects located within the North Forced Basin. The attached maps show the
locations of the projects, shown in Figure 5-7 to 5-9.
Scope of Project
The first phase of comprehensive rehabilitation projects will be the physical inspection of
the pipes and manholes including CCTV inspection of pipes. Smoke testing may 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 detailed design and preparation of construction
documents for project bidding.
The construction of rehabilitation projects will typically include the following components.
Replacement of pipes
Point repair of pipes
Rehabilitation of pipes by cured in place pipe liners
Rehabilitation or replacement of manholes
Repair of sewer laterals to the property line
Cost
The estimated costs for each project are presented in Table 5-4. 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 the
components will be assessed and appropriate methods recommended. At that time, the cost
estimate for each project will be revised. For those projects under construction, the actual
bid amounts are included as construction costs in Table 5-4.
GNV31031158552.DOCX/103470004 5-19 JANUARY 2011
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