City of Morgan Hill Sewer System Master Plan 2017

August 2017

1-4

City of Morgan Hill

Sewer System Master Plan

that were used in the completion of this master plan, as well as a brief description of each

document:

City of Morgan Hill Sewer System Master Plan, February 2002 (2002 SSMP).

This

report documents the planning and performance criteria, evaluates the sewer system,

recommends improvements, and provides an estimate of costs.

City of Morgan Hill 2035 General Plan, July 2016 (2035 General Plan).

e City’s

2035General Plan provides future land use planning, and growth assumptions for the

planning areas. Additionally, this report establishes the planning horizon for improvements

in this master plan.

Morgan Hill-Gilroy Joint Trunk Relief Phasing.

This study evaluates the hydraulic

capacity of the uppers segments of the Joint Trunk Sewer, between the Cities of Morgan

Hill and Gilroy.

Morgan Hill-Gilroy Joint Trunk Capacity Allocation.

This study summarizes the

capacity allocation between the Cities of Morgan Hill and Gilroy, in accordance with the

2008 capacity analysis.

2015 Urban Water Management Plan (2015 UWMP).

The 2015 Urban Water

Management Plan (UWMP) establishes a benchmark per capita water usage and targets

in order to achieve higher levels of water conservation for the sustainability of water supply

sources. This includes adopting an updated water shortage contingency plan, defining

supply sources, addressing supply reliability, and projecting sustainable supply yields and

future demands.

1.5 REPORT ORGANIZATION

The Sewer System Master Plan report contains the following chapters:

Chapter 1 – Introduction.

This chapter provides a brief background of the City of

Morgan Hill’s

sewer system, the need for this master plan, and the objectives of the study. Abbreviations and

definitions are also provided in this chapter.

Chapter 2 – Planning Area Characteristics.

This chapter presents a discussion of the planning

area characteristics for this master plan including a study area description; service areas land use;

and population for the City of Morgan Hill.

Chapter 3 – System Performance and Design Criteria.

This chapter presents the City’s

performance and design criteria, which were used in this master plan for evaluating the adequacy

of capacity for the existing sanitary sewer system and for sizing improvements required to mitigate

deficiencies and to accommodate future growth. The design criteria include: capacity

requirements for the sanitary sewer facilities, flow calculation methodologies for future users, flow

peaking factors, and accounting for infiltration and inflows.