City of Morgan Hill Sewer System Master Plan 2017

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City of Morgan Hill
Sewer System Master Plan
TABLE OF CONTENTS PAGE NO.
August 2017 i City of Morgan Hill
Sewer System Master Plan
0.
ES.1 STUDY OBJECTIVES .....................................................................................ES-1
ES.2 INTEGRATED APPROACH TO MASTER PLANNING ....................................ES-2
ES.3 STUDY AREA DESCRIPTION.........................................................................ES-2
ES.4 SYSTEM PERFORMANCE AND DESIGN CRITERIA.....................................ES-4
ES.5 EXISTING SEWER COLLECTION SYSTEM OERVIEW .................................ES-4
ES.6 SANITARY SEWER FLOWS ...........................................................................ES-4
ES.7 HYDRAULIC MODEL DEVELOPMENT AND CALIBRATION..........................ES-8
ES.8 CAPACITY EVALUATION ...............................................................................ES-11
ES.9 CAPITAL IMPROVEMENT PROGRAM...........................................................ES-11
1.
1.1 BACKGROUND...............................................................................................1-1
1.2 SCOPE OF WORK ..........................................................................................1-1
1.3 INTEGRATED APPROACH TO MASTER PLANNING ....................................1-3
1.4 RELEVANT REPORTS ...................................................................................1-3
1.5 REPORT ORGANIZATION..............................................................................1-4
1.6 ACKNOWLEDGEMENTS ................................................................................1-5
1.7 UNIT CONVERSIONS AND ABBREVIATIONS ...............................................1-6
1.8 GEOGRAPHIC INFORMATION SYSTEMS.....................................................1-6
2.
2.1 STUDY AREA DESCRIPTION.........................................................................2-1
2.2 SEWER SERVICE AREAS AND LAND USE...................................................2-1
2.3 HISTORICAL AND PROJECTED POPULATION.............................................2-5
3.
3.1 HYDRAULIC CAPACITY CRITERIA................................................................3-1
3.1.1 Gravity Sewers ..................................................................................3-1
3.1.2 Force Mains and Lift Stations ............................................................3-5
3.2 DRY WEATHER FLOW CRITERIA .................................................................3-5
3.2.1 Unit Flow Factors Methodology .........................................................3-6
3.2.2 Average Daily Wastewater Unit Flow Factors ....................................3-6
3.2.3 Peaking Factors.................................................................................3-6
3.3 WET WEATHER FLOW CRITERIA .................................................................3-9
3.3.1 Infiltration and Inflow..........................................................................3-9
3.3.2 Sewer System Flow Monitoring .........................................................3-14
3.3.3 10-Year 24-Hour Design Storm .........................................................3-14
4.
4.1 SEWER COLLECTION SYSTEM OVERVIEW ................................................4-1
4.2 SEWER COLLECTION BASINS AND TRUNKS..............................................4-1
4.2.1 Butterfield Trunk ................................................................................4-1
4.2.2 Llagas Trunk......................................................................................4-1
4.2.3 Hale-Monterey Trunk .........................................................................4-7
4.2.4 Hill-Barrett Trunk ...............................................................................4-7
4.2.5 East Dunne Trunk..............................................................................4-7
4.2.6 Railroad-Monterey Trunk ...................................................................4-7