City of Morgan Hill Sewer System Master Plan 2017

City of Morgan Hill

Sewer System Master Plan

TABLE OF CONTENTS

PAGE NO.

August 2017

City of Morgan Hill

Sewer System Master Plan

TABLES

Table ES.1 Sewer System Performance and Design Criteria .............................................ES-6

Table ES.2 Existing Sewer Pipe Inventory .........................................................................ES-7

Table ES.3 Historical Flows at the SCRWA Plant...............................................................ES-9

Table ES.4 Average Daily Flows at Buildout of Project Area ..............................................ES-10

Table ES.5 Capital Improvement Program .........................................................................ES-13

Table 1.1

Unit Conversions..............................................................................................1-7

Table 1.2

Abbreviations and Acronyms............................................................................1-8

Table 2.1

Existing and Future Sewer Service Area..........................................................2-4

Table 2.2

Historical and Projected Population..................................................................2-7

Table 3.1

Sewer System Performance and Design Criteria .............................................3-4

Table 3.2

Unit Flow Factors Analysis ...............................................................................3-7

Table 3.3

Average Daily Sewer Unit Flow Factors ...........................................................3-8

Table 3.4

Precipitation Depth-Duration-Frequency ..........................................................3-16

Table 3.5

Storm Events Analysis .....................................................................................3-17

Table 4.1

Existing GIS Pipeline Inventory ........................................................................4-6

Table 4.2

Existing System Lift Station Inventory ..............................................................4-10

Table 5.1

Historical Flow Data and Peaking Factors........................................................5-3

Table 5.2

Sewer Flow Distribution ...................................................................................5-5

Table 5.3

Average Daily Flows at Buildout of the Project Area ........................................5-7

Table 5.4

Design Flows ...................................................................................................5-9

Table 6.1

Modeled Sewer Pipe Inventory ........................................................................6-4

Table 6.2

Flow Monitoring Sites.......................................................................................6-7

Table 6.3

Calibration Results Summary...........................................................................6-8

Table 7.1

Schedule of Improvements ..............................................................................7-6

Table 7.2

Planned Operational Improvements .................................................................7-15

Table 8.1

Capacity Improvement Unit Costs ....................................................................8-3

Table 8.2

Capital Improvement Program .........................................................................8-6

Table 8.3

5-Year Improvement Phasing...........................................................................8-11

Table 8.4

Suggested Expenditure Budget........................................................................8-12

APPENDICES

Appendix A Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study, 2014 (V&A)

Appendix B Hydraulic Model Calibration Exhibits

Appendix C Condition Assessment Exhibits