The Del Paso Manor Water District (District) has long been committed to providing a safe and reliable water supply, while at the same time maintaining low water rates. This Water System Master Plan is the first District master plan and documents planning strategies developed to address aging infrastructure and changing water supply pressures. This Master Plan has been prepared as a working document capturing engineering evaluations and recommendations while also allowing for adaptation as conditions and policy changes.

This Water System Master Plan documents the Del Paso Manor Water District policy regarding policy, vision and direction for the District and does not commit the rate-payers to a specific discretionary action to implement the policy goals. Evaluation of funding and rate impacts, California Environmental Quality Act (CEQA) review, and possibly construction implementation will flow from the vision of this Master Plan and reflect the next steps in the process of renewing the infrastructure of the District.

The HydroScience Technical Memorandum (TM) represents an amendment (2022 Amendment) to the District’s 2009 Water Master Plan (2009 WMP) to document data, policies, projects, and strategies that have been completed or updated in the intervening 12 years and provides a roadmap for reaching new policy and vision goals. This 2022 Amendment updates specific aspects of the 2009 WMP as follows:

• Water demands and planning criteria.
• Water supply and wells.
• Hydraulic modeling utilizing updated system flow criteria to determine pipe and hydrant deficiencies.
• Identification of near term (0-5 years) prioritized projects to address the most significant deficiencies.
• Longer-term recommendations for additional studies and projects.

This 2022 Amendment does not commit the ratepayer to any specific discretionary action in order
to implement policy goals. Updates to the 2009 WMP are presented in this TM, which is organized
similarly to the 2009 WMP. The TM includes references to the 2009 WMP where appropriate, for
convenience.

In addition to updating the data and facilities to represent current conditions, this 2022
Amendment presents a preliminary Capital Improvement Plan (CIP) for near-term system
improvements to supplement the longer-range improvements in the 2009 WMP. There are
significant liabilities facing the District in maintaining a high quality, reliable water supply and level
of service. These liabilities are addressed by the recommended CIP.