HomeMy WebLinkAbout2022 05 02 Public Hearing 400 - Wastewater/Reclaimed Water Master Plan | East and West WRF Conceptual Design Reports (Resolutions 2022-08; 2022-09; 2022-10) + , PUBLIC HEARINGS AGENDA ITEM 400
CITY COMMISSION AGENDA I MAY 2, 2022 SPECIAL MEETING
TITLE
Wastewater/Reclaimed Water Master Plan I East and West WRF Conceptual
Design Reports
SUMMARY
The Public Works and Utilities Department requests that the City Commission hold a
Public Hearing to consider the 2022 Wastewater and Reclaimed Water Master Plan,
East Water Reclamation Facility(WRF) Conceptual Design Report and West Water
Reclamation Facility(WRF) Conceptual Design Report. Following presentations and
consideration of the 2022 Wastewater and Reclaimed Water Master Plan, West Water
Reclamation Facility Conceptual Design Report, and East Water Reclamation Facility
Conceptual Design Report, the Public Works and Utilities Department requests the City
Commission, by separate vote for each resolution individually, adopt each of the
following:
• RESOLUTION NUMBER 2022-08: A resolution of the City Commission of the City
of Winter Springs, Florida, relating to the Florida Department of Environmental
Protection (FDEP) State Revolving Fund (SRF), adopting the Wastewater Master
Plan for the implementation of the East and West Water Reclamation Facility
improvements; providing for the repeal of prior inconsistent resolutions,
severability, and an effective date.
• RESOLUTION NUMBER 2022-09: A resolution of the City Commission of the City
of Winter Springs, Florida, relating to the Florida Department of Environmental
Protection (FDEP) State Revolving Fund (SRF), adopting the conceptual design
report for the implementation of the West Water Reclamation facility
improvements; providing for the repeal of prior inconsistent resolutions,
severability, and an effective date.
• RESOLUTION NUMBER 2022-10: A resolution of the City Commission of the City
of Winter Springs, Florida, relating to the Florida Department of Environmental
Protection (FDEP) State Revolving Fund (SRF), adopting the conceptual design
report for the implementation of the East Water Reclamation facility
improvements; providing for the repeal of prior inconsistent resolutions,
severability, and an effective date.
Wastewater and Reclaimed Water Master Plan: The 2022 Wastewater and
Reclaimed Water Master Plan identifies capacity limitations within the wastewater
system, reclaimed water system, and provides recommended time-phased
improvements to meet future demands in the City of Winter Springs'wastewater and
1
reclaimed water service areas. This Master Plan is intended to serve as the
foundational planning document identifying, prioritizing, and aligning future
improvements with the City's Capital Improvement Plan (CIP), the projects necessary to
meet the projected future demands of the City's wastewater collection, wastewater
treatment, and reclaimed water systems. The City presently owns and operates two
water reclamation facilities (WRF), along with three reclaimed water storage and
pumping facilities. Wastewater is delivered to the WRFs from an extensive gravity pipe
system, with direct pumping to the facilities supplied by 51 lift stations through
pressurized force mains. The reclaimed water system currently operates 6 disposal
sites, and an extensive residential irrigation system. The plan identifies and prioritizes
improvements based on the current operational condition of existing collection,
transmission, conveyance, treatment, disposal infrastructure, and where deficiencies
have a potential to develop as projected growth is realized within the service area.
West Water Reclamation Facility Conceptual Design Report: The West Water
Reclamation Facility Conceptual Design Report(CDR) is based on a comprehensive
assessment of the facility which is currently permitted for 2.07 million gallons per day
(MGD)Annual Average Daily Flow (AADF) by the Florida Department of Environmental
Protection. Currently the facility experiences flows at approximately half this capacity.
The West WRF was originally installed in the 1980s and has consequently reached the
end of its useful operational life, requiring both replacement and modernization.
Based on thorough engineering assessments, growth considerations, and the current
condition of the facility, this CDR focuses on the replacement of the West WRF, and
concludes that while some existing infrastructure may be rehabilitated and serve on a
temporary basis, no major components have a permanent value worth restoring for
permanent use. The specific object of this effort is to conceptualize a resilient, reliable
new facility capable of meeting current and future water quality requirements while
planning for growth and expansion to meet future demands and increasingly stringent
regulatory requirements over decades to come. This CDR outlines the process leading
to selection of the best suited treatment alternative, conceptual design, and site
layout. This CDR also provides planning level conceptual Capital, and Operations and
Maintenance (O&M) costs for construction of a facility sized to meet the City's needs
over the next 20 years, while readily capable of expansion to meet future quality-
Advanced Wastewater Treatment (AWT) regulations and quantity requirements if and
when necessary.
East Water Reclamation Facility Conceptual Design Report: The East Water
Reclamation Facility Conceptual Design Report(CDR) is based on a comprehensive
assessment of the facility which is currently permitted for 2.012 million gallons per day
(MGD)Annual Average Daily Flow (AADF) by the Florida Department of Environmental
Protection. Currently the facility experiences flows at approximately half this capacity.
The East WRF was originally installed in the mid-1970s and early 1990's and has
consequently reached the end of its useful operational life, requiring both
replacement and modernization. Based on thorough engineering assessments,
growth considerations, and the current condition of the facility, this CDR focuses on
the replacement of the East WRF, and concludes that while some existing
2
infrastructure may be rehabilitated and serve on a temporary basis, no major
components have a permanent value worth restoring for permanent use. The specific
object of this effort is to conceptualize a resilient, reliable new facility capable of
meeting current and future water quality requirements while planning for growth and
expansion to meet future demands and increasingly stringent regulatory
requirements over decades to come. This CDR outlines the process leading to
selection of the best suited treatment alternative, conceptual design, and site layout.
This CDR also provides planning level conceptual Capital, and Operations and
Maintenance (O&M) costs for construction of a facility sized to meet the City's needs
over the next 20 years, while readily capable of expansion to meet future quality-
Advanced Wastewater Treatment (AWT) regulations and quantity requirements if and
when necessary.
RECOMMENDATION
Staff requests the City Commission, consider and, by separate vote, adopt each of the
following:
• RESOLUTION NUMBER 2022-08: A resolution of the City Commission of the City
of Winter Springs, Florida, relating to the Florida Department of Environmental
Protection (FDEP) State Revolving Fund (SRF), adopting the Wastewater Master
Plan for the implementation of the East and West Water Reclamation Facility
improvements; providing for the repeal of prior inconsistent resolutions,
severability, and an effective date.
• RESOLUTION NUMBER 2022-09: A resolution of the City Commission of the City
of Winter Springs, Florida, relating to the Florida Department of Environmental
Protection (FDEP) State Revolving Fund (SRF), adopting the conceptual design
report for the implementation of the West Water Reclamation facility
improvements; providing for the repeal of prior inconsistent resolutions,
severability, and an effective date.
• RESOLUTION NUMBER 2022-10: A resolution of the City Commission of the City
of Winter Springs, Florida, relating to the Florida Department of Environmental
Protection (FDEP) State Revolving Fund (SRF), adopting the conceptual design
report for the implementation of the East Water Reclamation facility
improvements; providing for the repeal of prior inconsistent resolutions,
severability, and an effective date.
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RESOLUTION NUMBER 2022-08
A RESOLUTION OF THE CITY COMMISSION OF THE CITY OF WINTER
SPRINGS, FLORIDA, RELATING TO THE FLORIDA DEPARTMENT OF
ENVIRONMENTAL PROTECTION (FDEP) STATE REVOLVING FUND
(SRF), ADOPTING THE WASTEWATER MASTER PLAN FOR THE
IMPLEMENTATION OF THE EAST AND WEST WATER RECLAMATION
FACILITY IMPROVEMENTS; PROVIDING FOR THE REPEAL OF PRIOR
INCONSISTENT RESOLUTIONS, SEVERABILITY,AND AN EFFECTIVE DATE.
WHEREAS, Florida Statutes provide for loans to local government agencies to
finance the design, and construction of wastewater facilities; and the Florida
Administrative Code requires the City Commission to formally adopt a facilities plan
outlining necessary wastewater facility improvements to comply with State of Florida
funding requirements;
WHEREAS, the City of Winter Springs intends to adopt more specific facilities
plans for both the East and West Water Reclamation Facilities; and
WHEREAS,the formal adoption of the proposed Master Plan is the first planning
step in the creation of the facilities plan required for the City of Winter Springs to
participate in the State Revolving Loan Fund Program;
WHEREAS, the City Commission of the City of Winter Springs, Florida agrees
with the findings and summary of necessary improvements as outlined in the Master Plan
for the purpose of designing and constructing Water Reclamation Facilities to replace the
existing East and West Water Reclamation Facilities;
NOW, THEREFORE, BE IT RESOLVED by the City Commission of the City
of Winter Springs, Florida as follows:
SECTION 1. FINDINGS
The foregoing findings are incorporated herein by reference and made a part hereof.
SECTION 2. ADOPTION OF MASTER PLAN.
The City of Winter Springs Florida, is authorized to and does hereby adopt the proposed
Master Plan, attached hereto as Exhibit A.
The City Manager is hereby designated as the authorized representative to provide the
assurances and commitments that will be required by the Master Plan.
The City Manager is hereby designated as the authorized representative to execute the
Master Plan which will become the foundation of all activities related to the wastewater
facility improvements. The City Manager is further authorized to represent the City in
38
carrying out the Master Plan. The City Manager is authorized to delegate responsibility to
appropriate City Staff to carry out technical, financial, and administrative activities
associated with the Master Plan.
The legal authority for adoption of this Master Plan is pursuant to the City Charter, City
Code of Ordinances, and the Laws of the State of Florida.
SECTION 3. REPEAL OF PRIOR INCONSISTENT RESOLUTIONS.
All Resolutions or part of Resolutions in conflict with any of the provisions of this
Resolution are hereby repealed.
SECTION 4. SEVERABILITY.
If any section or portion of a section of this Resolution proves to be invalid, unlawful, or
unconstitutional, it shall not be held to invalidate or impair the validity, force, or effect or
any other section or part of this Resolution.
SECTION S. EFFECTIVE DATE
This Resolution shall take effect upon its approval and adoption by the City Commission.
APPROVED AND ADOPTED THIS 2ND DAY OF MAY,2022.
CITY COMMISSION
CITY OF WINTER SPRINGS,FLORIDA
KEVIN MCCANN,MAYOR (SEAL)
ATTEST: APPROVED AS TO FORM:
CHRISTIAN GOWAN,CITY CLERK ANTHONY A.GARGANESE,CITY ATTORNEY
39
RESOLUTION NUMBER 2022-09
A RESOLUTION OF THE CITY COMMISSION OF THE CITY OF WINTER
SPRINGS, FLORIDA, RELATING TO THE FLORIDA DEPARTMENT OF
ENVIRONMENTAL PROTECTION (FDEP) STATE REVOLVING FUND
(SRF), ADOPTING THE CONCEPTUAL DESIGN REPORT FOR THE
IMPLEMENTATION OF THE WEST WATER RECLAMATION FACILITY
IMPROVEMENTS; PROVIDING FOR THE REPEAL OF PRIOR INCONSISTENT
RESOLUTIONS,SEVERABILITY,AND AN EFFECTIVE DATE.
WHEREAS, Florida Statutes provide for loans to local government agencies to
finance the design, and construction of wastewater facilities; and the Florida
Administrative Code requires the City Commission to formally adopt a facilities plan
outlining necessary wastewater facility improvements to comply with State of Florida
funding requirements;
WHEREAS, the City of Winter Springs intends to adopt a more specific Facility
Plan for the West Water Reclamation Facility to apply for such financing; and
WHEREAS, the formal adoption of the proposed Conceptual Design Report for
the West Water Reclamation Facility is intended to guide the creation and preparation of
the Facility Plan required for the City of Winter Springs to participate in the State
Revolving Loan Fund Program and shall be the conceptual basis for the design and
construction of the West Water Reclamation Facility; and
WHEREAS, the City Commission of the City of Winter Springs, Florida agrees
with the findings and summary of necessary improvements as outlined in the Conceptual
Design Report for the purpose of designing and constructing a Water Reclamation Facility
to replace the existing West Water Reclamation Facility; and
NOW, THEREFORE, BE IT RESOLVED by the City Commission of the City
of Winter Springs, Florida as follows:
SECTION 1. FINDINGS
The foregoing findings are incorporated herein by reference and made a part hereof.
SECTION 2. ADOPTION OF THE CONCEPTUAL DESIGN REPORT.
The City of Winter Springs Florida, is authorized to and does hereby adopt the proposed
Conceptual Design Report for the West Water Reclamation Facility, attached hereto as
Exhibit A.
The City Manager is hereby designated as the authorized representative to provide the
assurances and commitments that will be required by the Conceptual Design Report.
40
The City Manager is hereby designated as the authorized representative to execute the
Conceptual Design Report, which, in conjunction with the Wastewater Master Plan
adopted via Resolution 2022-08, will become the foundation of all activities related to the
wastewater facility improvements. The City Manager is further authorized to represent the
City in carrying out the Conceptual Design Report. The City Manager is authorized to
delegate responsibility to appropriate City Staff to carry out technical, financial, and
administrative activities associated with the Conceptual Design Report.
The legal authority for adoption of this Conceptual Design Report is pursuant to the City
Charter, City Code of Ordinances, and the Laws of the State of Florida.
SECTION 3. REPEAL OF PRIOR INCONSISTENT RESOLUTIONS.
All Resolutions or part of Resolutions in conflict with any of the provisions of this
Resolution are hereby repealed.
SECTION 4. SEVERABILITY.
If any section or portion of a section of this Resolution proves to be invalid, unlawful, or
unconstitutional, it shall not be held to invalidated or impair the validity, force, or effect or
any other section or part of this Resolution.
SECTION 5. EFFECTIVE DATE
This Resolution shall take effect upon its approval and adoption by the City Commission.
APPROVED AND ADOPTED THIS 2ND DAY OF MAY,2022.
CITY COMMISSION
CITY OF WINTER SPRINGS,FLORIDA
KEVIN MCCANN,MAYOR (SEAL)
ATTEST: APPROVED AS TO FORM:
CHRISTIAN GOWAN,CITY CLERK ANTHONY A.GARGANESE,CITY ATTORNEY
41
RESOLUTION NUMBER 2022-10
A RESOLUTION OF THE CITY COMMISSION OF THE CITY OF WINTER
SPRINGS, FLORIDA, RELATING TO THE FLORIDA DEPARTMENT OF
ENVIRONMENTAL PROTECTION (FDEP) STATE REVOLVING FUND
(SRF), ADOPTING THE CONCEPTUAL DESIGN REPORT FOR THE
IMPLEMENTATION OF THE EAST WATER RECLAMATION FACILITY
IMPROVEMENTS; PROVIDING FOR THE REPEAL OF PRIOR INCONSISTENT
RESOLUTIONS,SEVERABILITY,AND AN EFFECTIVE DATE.
WHEREAS, Florida Statutes provide for loans to local government agencies to
finance the design, and construction of wastewater facilities; and the Florida
Administrative Code requires the City Commission to formally adopt a facilities plan
outlining necessary wastewater facility improvements to comply with State of Florida
funding requirements;
WHEREAS, the City of Winter Springs intends to adopt a more specific Facility
Plan for the East Water Reclamation Facility to apply for such financing; and
WHEREAS, the formal adoption of the proposed Conceptual Design Report for
the East Water Reclamation Facility is intended to guide the creation and preparation of
the Facility Plan required for the City of Winter Springs to participate in the State
Revolving Loan Fund Program and shall be the conceptual basis for the design and
construction of the East Water Reclamation Facility; and
WHEREAS, the City Commission of the City of Winter Springs, Florida agrees
with the findings and summary of necessary improvements as outlined in the Conceptual
Design Report for the purpose of designing and constructing a Water Reclamation Facility
to replace the existing East Water Reclamation Facility; and
NOW, THEREFORE, BE IT RESOLVED by the City Commission of the City
of Winter Springs, Florida as follows:
SECTION 1. FINDINGS
The foregoing findings are incorporated herein by reference and made a part hereof.
SECTION 2. ADOPTION OF THE CONCEPTUAL DESIGN REPORT.
The City of Winter Springs Florida, is authorized to and does hereby adopt the proposed
Conceptual Design Report for the East Water Reclamation Facility, attached hereto as
Exhibit A.
The City Manager is hereby designated as the authorized representative to provide the
assurances and commitments that will be required by the Conceptual Design Report.
42
The City Manager is hereby designated as the authorized representative to execute the
Conceptual Design Report, which, in conjunction with the Wastewater Master Plan
adopted via Resolution 2022-08, will become the foundation of all activities related to the
wastewater facility improvements. The City Manager is further authorized to represent the
City in carrying out the Conceptual Design Report. The City Manager is authorized to
delegate responsibility to appropriate City Staff to carry out technical, financial, and
administrative activities associated with the Conceptual Design Report.
The legal authority for adoption of this Conceptual Design Report is pursuant to the City
Charter, City Code of Ordinances, and the Laws of the State of Florida.
SECTION 3. REPEAL OF PRIOR INCONSISTENT RESOLUTIONS.
All Resolutions or part of Resolutions in conflict with any of the provisions of this
Resolution are hereby repealed.
SECTION 4. SEVERABILITY.
If any section or portion of a section of this Resolution proves to be invalid, unlawful, or
unconstitutional, it shall not be held to invalidated or impair the validity, force, or effect or
any other section or part of this Resolution.
SECTION 5. EFFECTIVE DATE
This Resolution shall take effect upon its approval and adoption by the City Commission.
APPROVED AND ADOPTED THIS 2ND DAY OF MAY,2022.
CITY COMMISSION
CITY OF WINTER SPRINGS,FLORIDA
KEVIN MCCANN,MAYOR (SEAL)
ATTEST: APPROVED AS TO FORM:
CHRISTIAN GOWAN,CITY CLERK ANTHONY A.GARGANESE,CITY ATTORNEY
43
City Of Winter springs, R
2022 wastewater and Reclaimed Water
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Prepared bye
Kimley-Horn and Associates, Inc.
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IF Kim ey
Expect More. Experience Better. April 202
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2022 Wastewater and Reclaimed Water Master Plan
Winter Springs, FL
CONTENTS
1 Executive Summary.................................................................................................................... 1
2 Introduction................................................................................................................................6
2.1 Background........................................................................................................................6
2.2 Objective, Scope, and Assumptions...................................................................................6
2.2.1 Objectives......................................................................................................................6
2.2.2 Scope............................................................................................................................6
3 Existing Wastewater System ......................................................................................................8
3.1 System Description............................................................................................................8
3.2 Wastewater Facility Permits.............................................................................................12
3.2.1 Florida Department of Environmental Protection...........................................................12
3.2.2 Existing Flows..............................................................................................................12
4 Wastewater Demand Projections.............................................................................................. 16
4.1 Discussion .......................................................................................................................16
4.2 Methodology for Estimating Demands.............................................................................. 16
4.2.1 Population from Land Use............................................................................................ 16
4.2.2 Billing Data Geocoding.................................................................................................18
4.2.3 Service Area Delineation, Estimates, and Projections...................................................19
4.2.4 Sewershed Delineation.................................................................................................24
4.3 Summary of Projected Flows............................................................................................28
5 Wastewater Model Analysis......................................................................................................30
5.1 Level of Detail..................................................................................................................30
5.2 Model Calibration.............................................................................................................33
5.2.1 Hydraulic Calibration ....................................................................................................34
5.3 Scenario Analysis ............................................................................................................35
5.3.1 Present-Day System Scenario......................................................................................35
5.3.2 5-Year System Scenario...............................................................................................35
5.3.3 10-Year System Scenario.............................................................................................35
5.3.4 20-Year System Scenario.............................................................................................35
5.3.5 Build-Out System Scenario...........................................................................................36
5.4 Model Results..................................................................................................................42
5.4.1 Present-Day System Results........................................................................................42
5.4.2 5-Year System Improvements......................................................................................44
5.4.3 10-Year System Improvements....................................................................................46
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5.4.4 20-Year System Improvements....................................................................................48
5.4.5 Build-Out System Improvements..................................................................................50
6 Wastewater Capacity Analysis Reports.....................................................................................52
6.1 East Water Reclamation Facility.......................................................................................52
6.1.1 Facility Description.......................................................................................................52
6.1.2 Analysis Results...........................................................................................................53
6.2 West Water Reclamation Facility......................................................................................54
6.2.1 Facility Description.......................................................................................................54
6.2.2 Analysis Results...........................................................................................................55
6.3 Lift Station Capacity Analysis...........................................................................................56
6.3.1 Present Day Analysis and Improvements.....................................................................56
6.3.2 Future Lift Station Improvements..................................................................................58
7 Recommended Wastewater System Capital Improvement Projects ..........................................59
7.1 Present-Day System Improvements.................................................................................59
7.2 5-Year System Improvements..........................................................................................59
7.3 10-Year System Improvements........................................................................................60
7.4 20-Year System Improvements........................................................................................60
7.5 Build-Out System Improvements......................................................................................61
7.6 Recommended System Improvements Summary.............................................................62
8 Reclaimed Water Public Access Distribution System................................................................64
8.1 System Description..........................................................................................................64
8.1.1 Reclaimed Water Distribution Pumps...........................................................................64
8.2 Permit Limitations ............................................................................................................66
8.2.1 East WRF Reuse and Effluent Disposal........................................................................66
8.2.2 West WRF Reuse and Effluent Disposal.......................................................................66
8.2.3 Reclaimed Water Storage, Reject, and Disposal...........................................................66
8.2.4 Existing Flows - Major Users........................................................................................68
9 Reclaimed Water Demand Projections......................................................................................69
9.1 Discussion.......................................................................................................................69
9.2 Methodology for Estimating Demands..............................................................................69
9.2.1 Population from Land Use............................................................................................69
9.2.2 Billing Data Geocoding.................................................................................................69
9.2.3 Metered Data...............................................................................................................70
9.2.4 Service Area................................................................................................................70
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9.3 Summary of Projected Flows............................................................................................72
10 Reclaimed Water Model Analysis .............................................................................................74
10.1 Level of Detail..................................................................................................................74
10.2 Model Calibration.............................................................................................................78
10.3 Hydraulic Calibration........................................................................................................78
10.4 Scenario Analysis ............................................................................................................85
10.4.1 Present-Day Scenario..............................................................................................85
10.4.2 5-Year Scenario.......................................................................................................88
10.4.3 10-Year Scenario.....................................................................................................90
10.4.4 20-Year Scenario.....................................................................................................92
10.4.5 Build-Out Scenario...................................................................................................94
10.5 Model Results..................................................................................................................96
10.5.1 Present-Day Results.................................................................................................96
10.5.2 5-Year Improvements............................................................................................. 100
10.5.3 10-Year Improvements........................................................................................... 102
10.5.4 20-Year Improvements........................................................................................... 104
10.5.5 Build-Out Improvements.........................................................................................106
11 Recommended Reclaimed Water System Capital Improvement Projects................................ 108
11.1 Present-Day System Improvements...............................................................................108
11.2 5-Year System Improvements........................................................................................108
11.3 10-Year System Improvements......................................................................................109
11.4 20-Year System Improvements......................................................................................110
11.5 Build-Out System Improvements....................................................................................110
11.6 Recommended System Improvements Summary...........................................................111
12 Capital Improvement Plan Funding Overview......................................................................... 113
12.1 Introduction....................................................................................................................113
12.2 Water and Wastewater Funding Sources........................................................................ 113
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LIST OF FIGURES
Figure 1: Existing Wastewater Service Area......................................................................................9
Figure 2.A: West Side Lift Stations Flow Diagram............................................................................10
Figure 2.13: East Side Lift Stations Flow Diagram.............................................................................11
Figure 3: East WRF Monthly Average Flows....................................................................................15
Figure 4: West WRF Monthly Average Flows...................................................................................15
Figure 5: Geocoding Example.........................................................................................................18
Figure 6: Map of Service Types in the City.......................................................................................20
Figure 7: Current Septic Areas ........................................................................................................21
Figure 8: Current Sewer Areas........................................................................................................22
Figure 9: Future Sewer Areas..........................................................................................................23
Figure 10: Lift Station Sewershed....................................................................................................25
Figure 11: Master Lift Station Sewershed ........................................................................................26
Figure 12: Water Reclamation Facility Sewershed...........................................................................27
Figure 13: Projected Wastewater Flows...........................................................................................29
Figure 14: Existing Wastewater System...........................................................................................32
Figure 15: Wastewater System— Present-Day Scenario..................................................................37
Figure 16: Wastewater System—5-Year Scenario...........................................................................38
Figure 17: Wastewater System— 10-Year Scenario.........................................................................39
Figure 18: Wastewater System—20-Year Scenario.........................................................................40
Figure 19: Wastewater System— Build-Out Scenario.......................................................................41
Figure 20: Wastewater Model Results— Present-Day Results..........................................................43
Figure 21: Wastewater Model Results—5-Year Results...................................................................45
Figure 22: Wastewater Model Results— 10-Year Results.................................................................47
Figure 23: Wastewater Model Results—20-Year Results.................................................................49
Figure 24: Wastewater Model Results— Build-Out Results...............................................................51
Figure 25: Lift Station CIP Evaluation Matrix....................................................................................56
Figure 26: Wastewater System Capital Improvement Project Locations...........................................63
Figure 27: Existing Reclaimed Water Service Area..........................................................................71
Figure 28: Modeled Existing Reclaimed Water System....................................................................77
Figure 29: Pressure Results of the Winter Springs Reclaimed Water System...................................80
Figure 30: Pressure Logger KH1 Calibration Results.......................................................................81
Figure 31: Pressure Logger KH2 Calibration Results.......................................................................82
Figure 32: Pressure Logger KH3 Calibration Results.......................................................................83
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Figure 33: Pressure Logger KH4 Calibration Results.......................................................................84
Figure 34: Reclaimed Water System —Present-Day Scenario 1 —Existing System.........................86
Figure 35: Reclaimed Water System—Present-Day Scenario 2—SR 434 Extensions.....................87
Figure 36: Reclaimed Water Model Results—5-Year Scenario........................................................89
Figure 37: Reclaimed Water Model Results— 10-Year Scenario......................................................91
Figure 38: Reclaimed Water System —20-Year Scenario.................................................................93
Figure 39: Reclaimed Water System—Build-Out Scenario...............................................................95
Figure 40: Reclaimed Water Model Results—Present-Day—Scenario 1 Results.............................97
Figure 41: Reclaimed Water Model Results—Present-Day—Scenario 2 Results.............................99
Figure 42: Reclaimed Water Model Results—5-Year Results ........................................................101
Figure 43: Reclaimed Water Model Results— 10-Year Results ......................................................103
Figure 44: Reclaimed Water Model Results—20-Year Results ......................................................105
Figure 45: Reclaimed Water Model Results— Build-Out Results....................................................107
Figure 46: Reclaimed Water System Capital Improvement Project Locations.................................112
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LIST OF TABLES
Table 1: City of Winter Springs Force Mains......................................................................................8
Table 2: City of Winter Springs WRF Permitted Capacity.................................................................12
Table 3: East WRF Monthly Average Flow (MGD) Summary........................................................... 13
Table 4: West WRF Monthly Average Flow(MGD) Summary.......................................................... 13
Table 5: Winter Springs Land Use Density/Intensity Codes..............................................................17
Table 6: Table of Served Populations..............................................................................................19
Table 7: Summary of Total Projected Wastewater Flows .................................................................28
Table 8: WRF Projected Flows and Percent of WRF Permitted Capacity..........................................28
Table 9: Lift Station Float Calculation Assumptions.........................................................................31
Table 10: Minimum Slopes for Gravity Mains...................................................................................33
Table 11: Wastewater AADF and Demand Calculations...................................................................35
Table 12: Model System Results- Present-Day System..................................................................42
Table 13: Wastewater System Results—5-Year Scenario................................................................44
Table 14: Model System Results—5-Year System Improvements....................................................44
Table 15: Wastewater System Results— 10-Year Scenario..............................................................46
Table 16: Model System Results— 10-Year System Improvements..................................................46
Table 17: Wastewater System Results—20-Year Scenario..............................................................48
Table 18: Model System Results—20-Year System Improvements..................................................48
Table 20: Model System Results— Build-Out System Improvements................................................50
Table 19: Wastewater System Results— Build-Out Scenario ...........................................................50
Table 21: Lift Station Improvements Based on CIP Evaluation Matrix...............................................57
Table 22: Redundancy and Reliability Improvements.......................................................................57
Table 23: Lift Station —Future Improvements...................................................................................58
Table 24: Recommended System Improvement Projects Cost Summary.........................................62
Table 25: Existing Distribution System Pipe Size and Length...........................................................64
Table 26: Existing Distribution System Pumps.................................................................................65
Table 27: Reclaimed Water Storage Capacity..................................................................................67
Table 28: Reject/Wet Weather Storage Ponds Permitted Capacity...................................................67
Table 29: Disposal Sites Permitted Capacity....................................................................................67
Table 30: Reclaimed Water Capacities and Demands .....................................................................68
Table 31: Summary of Projected Reclaimed Water Flows................................................................72
Table 32: East WRF Pumps Summary............................................................................................75
Table 33: West WRF Pumps Summary...........................................................................................75
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Table 34: Oak Forest Storage Tank Pumps.....................................................................................76
Table 35: Pressure Data (December 16, 2021)................................................................................85
Table 36: Reclaimed Water Model Results— Present-Day Scenario— Existing System....................96
Table 37: Reclaimed Water Model Results — Present-Day Scenario — SR 434 Reclaimed Water
Extension........................................................................................................................................98
Table 38: Reclaimed Water Model Results—5-Year Results .........................................................100
Table 39: Reclaimed Water Model Results— 10-Year Scenario .....................................................102
Table 40: Reclaimed Water Model Results—20-Year Scenario .....................................................104
Table 41: Reclaimed Water Model Results— Build-Out Scenario................................................... 106
Table 42: Recommended System Improvement Projects Cost Summary.......................................111
APPENDICES
Appendix A— CIP Table
Appendix B— Carollo CAR
Appendix C— Lift Station CIP Evaluation Matrix
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1 EXECUTIVE SUMMARY
The primary objective of this Wastewater and Reclaimed Water Master Plan (Master Plan) is to identify
capacity limitations within the wastewater system, reclaimed water system, and to provide
recommended improvements to meet future demands in the City of Winter Springs' wastewater and
reclaimed water service areas. The intent of this Master Plan is to provide the City with guidance in
both identifying and prioritizing future improvements with the City's Capital Improvement Plan (CIP)
projects necessary to meet the projected future demands of the City's wastewater collection,
wastewater treatment, and reclaimed water systems. The City presently owns and operates two water
reclamation facilities (WRF), and three reclaimed water storage and pumping facilities. Wastewater is
delivered to the WRFs from an extensive gravity pipe system, with direct pumping to the facilities
supplied by 51 lift stations through pressurized force mains. The reclaimed water system currently
operates with 6 disposal sites, and 3 major users, with an extensive residential irrigation system.
Improvements were identified and prioritized based on the operational condition of the existing
infrastructure, and where deficiencies could develop based on projected growth within the service area.
The primary scope elements of this Master Plan report are as follows:
1. Prepare system demand projections for the present-day, 5-year, 10-year, and 20-year time
horizons.
2. Demand projections will include septic to sewer conversion opportunities identified by the City.
3. Prepare wastewater and reclaimed water master plans based on the present-day, 5-year, 10-
year, and 20-year demand projections.
4. Review the Florida Department of Environmental Protection (FDEP) water reclamation facility
(WRF) capacity analysis report (CAR) update provided by others.
5. Develop a dynamic hydraulic model for both wastewater and reclaimed water systems.
6. Recommend system improvements for present-day, 5-year, 10-year, and 20-year planning
horizons based on the calibrated hydraulic models and facility assessments.
The analysis presented herein is based on existing conditions and the following assumptions, which
should be updated as conditions change with time:
1. Model scenarios were evaluated under Extended Period Simulation (EPS). The EPS model
requires the wet well diameter, pump operating points and curves, peak inflows, and storage
tank volumes. Extended period simulations allow for a more accurate analysis of the multiple
lift stations contributing to the flow within the force main. Lift stations identified as duplex
stations were modeled with only one pump operating.
2. Model calibrations were considered acceptable if operating conditions were within 15% of
existing conditions within the utility service area.
3. When evaluating and recommending proposed improvements to the system, the 20-year
projected Peak Hour Flows (PHF)were considered.
4. Minimum slopes were used when evaluating the gravity sewer mains per the City of Winter
Springs design standards.
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5. Future scenarios with proposed improvements due to increased flows through the system were
based on projected flow values agreed upon by the City and Kimley-Horn. These include
population growth, new connections, and existing septic to sewer conversion opportunities.
6. Wastewater effluent disposal sites were evaluated as all being operational and active at their
permitted capacity.
7. Cost Opinion Criteria: The opinion of probable costs presented herein has been prepared
based on master plan level information. Because of the level of scope development at this
stage, the opinion is an "order of magnitude" estimate. An order of magnitude estimate is one
that is made without detailed engineering data and uses techniques such as cost curves,
unitized pricing, and scaling factors from similar projects. Based on the level of scope
development at the master plan level, the opinion of project costs presented herein are Class
5 estimates as defined by the Association for the Advancement of Cost Engineering
International (AACE International) Recommended Practice No. 56R-08 — Cost Estimate
Classification System as Applied for the Building and General Construction Industries. The
expected range of accuracy for this class of cost opinion is +50 percent to-30 percent. These
opinions of probable costs have been prepared for guidance in project evaluation and
implementation based on information available during report development. More detailed
estimates are typically developed as the project scopes are better defined and the
implementation process progresses. Cost estimates for improvements were derived from
Kimley-Horn's internal cost estimation databases, which are a compilation of cost curves,
recent bids, and condition assessment work performed for other local agencies and
municipalities in recent years. The costs are based on 2022 dollars and do not include
escalation for inflation.
8. The following hydraulic parameters were used to evaluate the wastewater model for
deficiencies:
a. Lift Stations— Identified as not having sufficient capacity if the primary duty pump(s)
could not meet estimated peak hour flows and/or meet the pressure standard for the
system resulting in adverse impacts to the lift station.
b. Force Mains—Identified as not having sufficient capacity if velocities resulted in being
outside the range of 2.0- 5.0 feet per second (fps) or if the pressures exceeded one-
half of the force main pipe pressure rating were considered at capacity. Since the
pressure rating of the force mains was unknown, a conservative assumption of DR-25
(165 psi) pipe was assumed.
The City's previous Wastewater Master Plan was completed in June of 2019. The past plan's 20-year
scenario projected the East WRF flow as 1.18 MGD Annual Average Daily Flow (AADF), and the West
WRF flow would remain at 1.06 MGD AADF for a combined flow of 2.24 MGD AADF. The projections
developed through this analysis indicates that the 20-year projected wastewater AADF for the City are
estimated to increase to 2.838 MGD, and reclaimed water demand will reach 2.0538 MGD AADF. The
City's Build-Out (beyond 20 years) projected wastewater AADF is 2.975 MGD which is largely due to
the existing septic systems converting to City sewer. These assumptions were made based on
population growth trends, historical demand trends, and potential for land development that can occur
within the City's utility service area.
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To meet the objectives of this Master Plan, hydraulic models of the City's wastewater conveyance
system and reclaimed water distribution system were constructed and calibrated utilizing SewerCAD
and WaterCAD, respectively. The wastewater hydraulic model consisted of the City's lift stations and
connecting force mains. Calibration of the model was performed using lift station drawdown test data,
pump manufacturer data provided by the City,and calibration of the system pressures through pressure
loggers installed at key locations.
The existing wastewater flows were developed from both the historical data at the City's WRFs and the
City's potable water billing data. Flow projections were then developed for the Present-Day, 5-year, 10-
year, and 20-year scenarios utilizing the City's Future Land Use data and the U.S. Census Bureau
population projections for Winter Springs. The calibrated model was then used to identify capital
improvement projects (i.e., force main upgrades and lift station improvements) that are recommended
to meet the projected demands of the City's Present-Day, 5-year, 10-year, and 20-year wastewater and
reclaimed water system. These improvements were added to the model and simulations were
performed to analyze the effectiveness of the proposed improvements. After discussion with the City,
future growth and developments are predicted to occur beyond the 20 years, therefore a Build-Out
scenario was created. These future improvements are listed in the CIP, however there is not a cost
associated with the projects due to their implementation being beyond the 20 year planning horizon.
The complete 20-year CIP is in Appendix A, the opinion of probable cost was calculated in today's
dollars for each recommended improvement. The following recommendations were identified for each
planning period.
EXISTING SYSTEM DEMANDS (2022) — This existing demand scenario modeled the City's
wastewater conveyance system with existing peak hour flows. Annual maintenance recommendations
were included for the City's consideration in each scenario. Present-day improvements for the existing
system were identified as follows:
Wastewater System Improvements
1. Annual lift station maintenance
2. Priority lift station repairs and resiliency improvements
3. Annual sewer system pipe replacement and relining
Reclaimed Water System Improvements
1. Annual replacements of reclaimed water main to priority areas
2. Repairs and replacements to existing pumping and piping infrastructure
3. Extension of reclaimed water main along State Road (SR)-434: starting at Central Winds Drive
and having connections to Bear Springs Drive, South Michael Blake Boulevard, Eagle Wind
Terrace, and Creeks Run Way
4. Annual maintenance of existing disposal sites and pumping facilities
5-YEAR FUTURE DEMAND SCENARIO (2027) —The following improvements are recommended to
be implemented over the next 5 years. The improvements that were considered were identified, and
are generally described below:
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Wastewater System Improvements
1. Design and construction to replace the East WRF
2. Design and construction to replace the West WRF
3. Capacity study of the existing gravity sewer system
4. Lift station priority improvements based on the Criteria Matrix developed in this Master Plan
5. Upsize pressure piping system
Reclaimed Water System Improvements
1. Conduct a feasibility analysis and rehabilitation for the Lake Jesup Augmentation plant
2. Meter upgrades and capacity assessment of all existing Rapid Infiltration Basins (RIBs)
3. Improvements to Oak Forest Reclaimed Water Pumping and Storage Facility
4. Upgrade and maintenance of existing West WRF pumping and storage infrastructure
5. Extension of reclaimed water main along Michael Blake Boulevard and Vistawilla Drive
6. Conversion of potable irrigation systems to reclaimed water systems for residents within the
Jesup's Landing community.
10-YEAR FUTURE DEMAND SCENARIO (2032) — The 10-year demand scenario analysis modeled
the projected additional flow in the City's pressurized wastewater conveyance system. The following
section details improvements recommended to be completed by 2032. The improvements that were
considered were identified, and are generally described below:
Wastewater System Improvements
1. Extension of pressure piping system
2. Lift station priority improvements based on the Criteria Matrix and future demands
3. Extension of gravity sewer system to new developments along SR 434
Reclaimed Water System Improvements
1. Extension of reclaimed water irrigation system to new developments along SR 434
2. Development of new reclaimed water connections to the St.Johns Landings, Glen Eagle,Arbor
Glen, Tuscawilla Wicklow neighborhood, and the Tuscawilla Country Club community along
Tuscora Dr
3. Conversion of potable irrigation systems located along Northern Way, Chestnut Ridges,
Chestnut Estates, and within the Oak Forest neighborhood, to reclaimed water systems
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20-YEAR FUTURE DEMAND SCENARIO (2042) — The 20-year scenario analysis modeled the
projected additional flow in the City's wastewater pressurized conveyance system. The following
section details improvements recommended to be completed by 2042. The improvements that were
considered were identified, and are generally described below:
Wastewater System Improvements
1. Upsize pressure piping system in selected locations
2. Lift station priority improvements based on the Criteria Matrix and future demands
3. Extension of gravity sewer system to the Greenway Interchange District (GID)
Reclaimed Water System Improvements
1. Extension of reclaimed water system to the Greenway Interchange District
2. Upsize effluent piping at the West WRF
BUILD-OUT (BEYOND 20 YEARS) FUTURE DEMAND SCENARIO (Beyond 2042) — The 20-year
plus scenario analysis modeled the projected additional flow in City's wastewater pressurized
conveyance system. The improvements that were considered were identified, and are generally
described below. However, there is not a cost included in the CIP for these recommendations.
Wastewater System Improvements
1. Expansion of the East WRF's capacity by 0.5 MGD to account for future demands
2. Upsizing of piping system and lift stations to account for future demands
3. Conversion of septic area infrastructure to the City's gravity sewer system
Reclaimed Water System Improvements
1. Construct additional reclaimed water storage for both the East WRF, and the West WRF
2. Upsizing of facility discharge piping to account for increased pump flow at both WRFs
3. Conversion of septic area infrastructure to the City's reclaimed water system
Based on the system modeling, field observations, and through discussions with City, a list of capital
improvement projects were developed for implementation over the next 20 years. The Capital
Improvements Plan (CIP) consists of improvement projects and is provided for guidance to assist the
City in developing a sustainable utility that includes a planning level cost estimate for budgeting
purposes.A list of the recommended capital improvement projects is included in Section land Section
12.
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2 INTRODUCTION
2.1 Background
The City of Winter Springs (City) requested professional services from Kimley-Horn &Associates, Inc.
to develop a comprehensive Wastewater and Reclaimed Water Master Plan (Master Plan) for the
purpose of identifying and prioritizing Capital Improvement Program (CIP) projects for the City's
wastewater and reclaimed water systems. This plan focuses on identifying capital improvements to the
City's wastewater and reclaimed water systems to serve the present-day, 5-year, 10-year, and 20-year
future demand scenarios of the utility service area. After discussion with the City, future growth and
developments are predicted to occur beyond the 20 years, therefore a Build-Out scenario was created.
These future improvements are listed in the CIP, however there is not a cost associated with the
projects as their implementation period is outside of the 20-year planning horizon. This plan
incorporates historical trends, future growth projections, and hydraulic model analyses to develop a
roadmap for responsible growth and improvement of the City's utility systems.
2.2 Objective, Scope, and Assumptions
2.2.1 Objectives
The primary objective of this report is to identify wastewater and reclaimed water utility system
improvements recommended to meet future demands and identify hydraulic capabilities and limitations
of the systems. This Master Plan provides guidance for system improvements that are proposed to
adequately meet the City's current and projected wastewater flows and reclaimed water demands for
the specific scenarios presented in this report. The analyses presented herein are based on stated
assumptions, hydraulic requirements, current standards, and should be updated as conditions change
with time.
2.2.2 Scope
The scope of this report comprises of development and calibration of hydraulic models for the City's
wastewater conveyance system and reclaimed water distribution system with the identification of
improvements to meet the future demands in the present-day and future utility service area. This report
focuses on planning level system improvements for meeting service area demands at the present-day,
5-year, 10-year, and 20-year planning horizons. The major elements of the plan are described below.
• Understanding of the existing wastewater and reclaimed water systems, including historical
flow and demand trends
• System demand projections for the 5-year, 10-year, and 20-year time horizons which include
future growth, system extensions, and septic-to-sewer conversions
• Development of dynamic calibrated wastewater and reclaimed water hydraulic models
assessing future conditions and identify recommended system capacity improvements. These
improvements may include new lift stations, new force mains and reclaimed water mains, and
modifications to the existing treatment, storage, and pumping systems
• Incorporation of corresponding expansion plans for the City's two WRFs to meet the future
growth and needed improvements
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• CIP projects for the wastewater and reclaimed water systems to support the results of the
hydraulic models
• Recommended prioritization, cost estimation, and scheduling of the proposed improvements
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3 EXISTING WASTEWATER SYSTEM
3.1 System Description
The City encompasses approximately 15 square miles within Seminole County, Florida. Within the
utility service area, the City's existing wastewater collection and conveyance system consists of fifty-
one (51) lift stations, and approximately 136,000 linear feet (LF) of force mains conveying wastewater
flows to two (2) Water Reclamation Facilities (WRF). The West WRF and the East WRF are the two
facilities which receive and treat wastewater, and pump reclaimed water throughout the City's utility
service area. In addition to these facilities, the City also operates the Oak Forest Reclaimed Water
Pumping and Storage facility, which stores and distributes reclaimed water received from the West
WRF. Table 1 provides a summary of the force main lengths by diameter. A majority of the force mains
are 8-inch or less and are generally comprised of ductile iron pipe (DIP) and PVC pipe. Figure 1
provides an aerial overview of the City's existing wastewater collection and conveyance system. As
Table 1 displays, a majority of the force mains are 8-inch or less.
rable 1: City of Winter Springs Force Mairi,
Force Main Diameter Length (LF)
24-inch 3,267
20-inch 5,793
16-inch 1,873
12-inch 7,197
10-inch 7,707
8-inch 38,746
6-inch or less 71,593
Total 136,176
Many of the City's lift stations discharge to gravity or to another lift station. Seven (7) major lift stations
that receive flow from other lift stations and convey wastewater directly to the WRFs are shown in the
schematic diagram as follows in Figure 2.A and Figure 2.B.
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Figure 2.A: West Side Lift Stations Flow Diagram
FIGURE 2.A - WEST SIDE LIFT STATIONS FLOW DIAGRAM
16W
14W
15W, 17W, 18W, 10W (Gen
and 21\A
11W, 5W, 8W 7W (Gen
1W (GEN),
4W (Bypass 2W,6W, 12W,
Pump), 9W, AND 19W, 20W AND
13W 22W
4
3W (Gen
WWRF
*Figure provided by Veolia North America(Veolia)
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Figure 2.B: East Side Lift Stations Flow Diagram
FIGURE 2.13 - EAST SIDE LIFT STATIONS FLOW DIAGRAM
16E 20E
14E (Bypass 18E
6E, 8E, 13E, 17E,
19E, 21E, 23E, anc 5E (Gen; 10E
27E
4E
12E, 22E (Bypass 2E (Gen;
Pump), 23E, 24E, 3E (Bypass
and 25E
1E (Plant Gen 7E, 11E,
9E,AND
15E
26E, 28E
EWRF
*Figure provided by Veolia North America(Veolia)
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3.2 Wastewater Facility Permits
3.2.1 Florida Department of Environmental Protection
The Florida Department of Environmental Protection (FDEP) is responsible for the permitting and
monitoring of domestic Wastewater Reclamation Facilities (WRF) for compliance with federal, state,
permitted effluent, and public access reclaimed water standards. The FDEP is also responsible for the
permitting of the capacity and reclaimed water quality standards of public access and restricted public
access sites. Table 2 summarizes the City's WRFs as designated and permitted by FDEP.
WRF Permit Number Permit Expiration Permitted Capacity
AADF MGD
East WRF (2017) FLA011068 March 13, 2022 2.012
East WRF (2022)* TBD* TBD* 2.012
West WRF FLA011067 January 15, 2024 2.07
*East WRF capacity analysis report for permit renewal submitted January 2022.
3.2.2 Existing Flows
FDEP Discharge Monitoring Reports (DMR)were obtained to evaluate the monthly flows over a 5-year
window from January 2016 to July 2021 from the City's WRF. Table 3 summarizes the flows for the
East WRF, and Table 4 summarizes the flows for the West WRF. Figure 3 illustrates the flows from
the East WRF and shows a less than 1% change in average monthly flow over the observed 5-year
period. Figure 4 illustrates the flows from the West WRF and also shows a less than 1% change in
average monthly flow over the observed 5-year period. Overall, the wastewater flows to each WRF
have been steady over the last five years, and any variances in flow can be attributed to seasonal
change or considered negligible to the overall WRFs capacity indicating no significant growth, due to
the stable population and demand within the City.
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Table 3: East WRIF Monthly Average Flow (MGD) Summary
Month 2016 2017 2018 2019 2020 2021
January 0.991 1.016 1.105 1.042 0.971 1.030
February 1.025 0.946 1.040 1.103 0.988 0.998
March 1.010 0.913 1.040 1.054 1.037 0.968
April 1.108 0.979 0.958 1.101 1.049 1.035
May 1.047 0.950 0.958 0.987 1.017 0.947
June 1.068 0.961 0.992 1.041 0.961 0.939
July 0.958 1.000 1.036 1.074 0.903 0.966
August 0.961 1.039 1.072 1.053 0.977 1.114
September 1.053 1.174 1.039 0.972 1.090 1.080
October 1.125 1.194 0.879 0.997 1.025 1.045
November 0.994 1.154 0.941 0.997 1.056 1.214
December 0.991 1.158 0.981 0.999 1.013 1.178
Average 1.028 1.040 1.003 1.035 1.007 1.043
Maximum 1.125 1.194 1.105 1.103 1.090 1.214
Minimum 0.958 0.913 0.879 0.972 0.903 0.939
.
Month 2016 1 2017 2018 2019 2020 2021
January 1.051 0.984 0.989 1.314 1.053 1.047
February 1.108 1.009 0.937 1.097 1.100 0.995
March 1.003 1.043 0.937 1.139 1.055 1.022
April 0.971 1.056 0.935 0.968 0.907 1.019
May 0.983 1.005 1.094 0.968 0.828 1.010
June 0.986 1.056 1.169 1.033 1.164 0.968
July 1.014 1.126 1.251 1.106 1.214 1.180
August 0.976 1.139 1.200 1.062 1.266 1.233
September 1.012 1.245 1.139 1.041 1.255 1.297
October 1.178 1.268 0.618 1.078 1.180 1.102
November 0.955 1.038 1.301 0.999 1.192 1.241
December 1.121 0.968 1.392 1.040 1.078 1.130
Average 1.030 1.078 1.080 1.070 1.108 1.104
Maximum 1.178 1.268 1.392 1.314 1.266 1.297
Minimum 0.955 0.968 0.618 0.968 0.828 0.968
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Utilizing the wastewater flows summarized above along with the City's wastewater billing records, the
existing average daily flow per connection was calculated to be 152 GPD for both the East and West
WRFs. The average number of persons per connection was assumed to be 2.51 based on the US
Census data, which equates to a per capita flow rate of 61 GPD for the East and West connections.
The existing wastewater flows per connection serve as the basis for calculation of future flow
projections. When adjusting the demand per person a factor of safety of 6.5% was added, then the
demand was rounded to 65 GPD for both service areas. This results in a per connection future demand
of 163.15 GPD, which was rounded up to 165 GPD for the purposes of this analysis.
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Figure 3: East WRF Monthly Average Flows
City of Winter Springs
East WWTF
Monthly Average Flow (MGD)
1.400
1.200 y=-2E-05x+1.8059
1.000 ... ..... ......
0.800
0.600
0.400
0.200
0.000
�D -.0 Q0 Q0 r, r, r, r, 00 00 00 00 rn rn rn rn 0 0 0 0
ci ci ci ci ci ci c-I c-I ci ci ci ci ci ci ci ci N N N N N N N
Q U Q U Q U Q U Q U Q
0 0 0 0 a 0 Q , 0 ; a 0 Q
Figure 4: West WRF Monthly Average Flows
City of Winter Springs
West WWTF
Monthly Average Flow (MGD)
1.600
1.400 y=3E-05x-0.0486
1.200
1.000 .. ........... . . . ... ........ ........... ....... .. ..... .. ..... .... ..... ........... ...........
0.800
0.600
0.400
0.200
0.000
�D 1.0 -.0 -.0 r, r, r, r, 00 00 00 00 rn rn rn rn 0 0 0 0
ci ci ci ci ci ci ci c-I ci ci ci ci ci ci ci ci N N N N N N N
� Q 7 U U U U
0 0 0 0 Q , 0 a o a 0 Q
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4 WASTEWATER DEMAND PROJECTIONS
4.1 Discussion
Estimating and projecting wastewater demands are performed with understanding service population
and the average per capita flow rate within the service population. Average flow rates are calculated
directly from the City's billing information. Estimations and projections of the City's service population
were initially assessed on a broad basis using well-established methods published by the St. Johns
River Water Management District (SJRWMD) water use planning guidance documents (SJRWMD
Special Publication SJ2009-SP7) and calibrated to University of Florida's Bureau of Economics and
Business Research (BEBR) county-level estimates and projections. Due to the size and unique
characteristics of Winter Springs, a more granular, site specific approach was adopted to estimate
future demands.
Service population estimations and projections for small areas such as land parcels are important
because 1) small areas can fit into the irregular boundaries of the City's wastewater service area, and
2) land parcels can be related to customer's billing addresses. The boundaries for large areas such as
zip codes and census tracts do not agree with the City's wastewater service area boundary. Splitting
and dividing large areas causes significant errors in estimates and projections because population is
not evenly distributed.
4.2 Methodology for Estimating Demands
Small area population estimations and projections require a geospatial database of tax parcels with
assigned Florida Department of Revenue (DOR) standard land use codes for parcels within the City's
service area. The Seminole County Property Appraiser provides this information. The DOR land use
codes help identify either 1) the number of residential dwelling units available for each parcel, 2)
commercial and industrial parcels, and 3) vacant parcels that have the potential to have future
wastewater service with DOR land use designations (e.g., common areas and right of ways). The
parcels that did not fall into the categories used in the projections below were verified for accuracy and
not included in population estimation or projection. The US Census has calculated the average
household is 2.51 people per household. This was applied to all residential connections and demand
projections.
4.2.1 Population from Land Use
The City's service area was categorized and consists of three (3) major land use categories:
1. Residential
2. Commercial and Industrial
3. Future Developments
A specific demand calculation methodology was applied for each land use category based on the City's
Future Land Use Map(FLUM). The following is a discussion of each methodology.
4.2.1.1 Residential
Residential demands were determined by estimating and projecting population per parcel in each lift
station basin for each planning period. The population projections for the City's service area are based
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on the SJRWMD population estimates and projection methodology referenced above. For large parcels
that contained multiple dwelling units such as multi-family residential and manufactured homes
communities, the number of residential units was determined by applying the limits of the City's existing
land use density/intensity codes (see Table 5)to the area of the parcel.
Codes'r ble 5: Winter Springs Land Use Density/intensity
Existing Land Use Categories Density/Intensity Acreage Percent of
Total
Residential — HOA Common Included in residential acreage
Areas
Residential — Rural Density Up to 1 du/gross acre 1,161 149%
Residential — Low Density 1.1 to 3.5 du/gross acre 2,303 27%
Residential — Medium Density 3.6 to 9 du/gross acre 618 7%
Residential — Mobile Homes Up to 9 du/gross acre 137 2%
Residential — High Density 9.1 to 21 du/gross acre 203 2%
Town Center Density Subject to the Town Center 579 7%
District Code
Mixed Use Up to 12 du/gross acre; 1.0 FAR 141 2%
Commercial—GID 0.50 to 1.0 FAR 0 0%
Commercial— Up to 0.50 FAR 123 1%
Neighborhood/General
Industrial Up to 0.50 FAR 84 1%
Public/Semi-Public Up to 0.50 FAR 637 8%
Recreation— Private & Public Up to 0.25 FAR 682 8%
Open Space Included in recreation acreage N/A N/A
Resource Protection— Drainage Included in residential acreage N/A N/A
Conservation Not developable 1,434 17%
Vacant Constrained Likely not developable 343 4%
Vacant Developable Varies based on FLUM 768 9%
Total 9,213 100%
NOTE:Existing Land Use Categories Common Area/HOA and Resource Protection/Drainage were integrated into the appropriate corresponding residential
land use for this analysis.SOURCE:City of Winter Springs and Planning Communities LLC,March 2009(Ord.2012-05)
4.2.1.2 Commercial and Industrial
The DOR land use designations were used as the basis for calculating future commercial and industrial
wastewater demands for these parcels. The Maximum Developable Area (MDA) and the Floor Area
Ratio (FAR) values were obtained from the City's comprehensive plan. With these designations, the
area of each commercial or industrial parcel was reduced by the MDA, and the square footage was
determined from the FAR.
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4.2.1.3 Future Developments
Future demands were determined from the projected population in DOR designated vacant or
agricultural parcels that did not have conservation, vacant government, wetlands, or recreation future
land use designations. These projections originate from development plans provided by the City or by
the maximum residential density for the future land use code in the comprehensive plan. Additional
future demand comes from the population of parcels that currently use septic systems and could be
connected into the City's wastewater system.
4.2.2 Billing Data Geocoding
The City's billing database contains information about historical flows of water, wastewater, and
reclaimed water organized by customer's service address. This information can be related to parcels
by locating the address to a geographical (x,y) location. This process of converting an address to a
geospatial location is called geocoding and is utilized in this analysis. Most addresses were geocoded
to a referenced spatial location and related to a land parcel within the City. Some accounts were
referenced to an address well beyond the City's boundaries. Only a few addresses were not able to be
geocoded due to insufficient address information. Figure 5 below depicts a Geocoding Example.
Figure 5: Geocoding Example
C9R ' T
23101 3999 HARBOR WINDS CT Homeowner Association_
10999 0SHEOAH BLVD Homeowner Association_
23983 0 ENTRANCE IRRIGATION Homeowner Association_
23831 0ARROWHEAD CT Homeowner Association
23953 0HOWELL CREEK DR Homeowner Association
24024 1333 CONGRESSIONAL CT Residential
20 12 100 WOODLEAF DR POOL_ Homeowner Association
15341 _234 SEVILLE CHASE OR Residential �. ..
19409 1310 WINTER SPRINGS BLVD Residential
24568 0 KRISTI ANN AND MOSS RD Homeowner Association �.
18033 1016 TURKEY HOLLOW CIR Residential
18680 0GRAND RESERVE Homeowner Association
19397 1316 WINTER SPRINGS BLVD Residential
19291 204 ARROWHEAD CT Residential ..
16346 1773OWASCOST Residential �a •••
19299 224 ARROWHEAD CT Residential ,
19309 105 ARROWHEAD CT Residential
1620] 1610 WHITE DOVE DR Residential
16370 677 CAYUGA DR Residential
.'...., s
19972 102 BAYTREE CT Residential �_ .. ,„,....,, •'•• •.: ;
16352 1761 OWASOD ST Residential
19310 103 ARROWHEAD cr Residential
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4.2.3 Service Area Delineation, Estimates, and Projections
Parcels with existing and future population were identified by the type of wastewater service. These
include the areas that currently have wastewater service, and the areas that do not have wastewater
service and are likely using septic systems, or vacant and may be served in the future. Also identified
are areas that do not have population and are not intended to be served such as right of way, recreation,
wetlands, and conservation parcels.
Areas with existing wastewater service were identified using geocoded billing data or the City's
geospatial datasets of the wastewater infrastructure (utility maps). Focused maps containing
wastewater infrastructure and parcel layers were used to select parcel features that were within
proximity of the infrastructure to be served. Most of these selections were done with automated GIS
processes. Commercial and industrial DOR land use parcels are considered served.Vacant residential
parcels within proximity to infrastructure are defined as future served. Residential areas in the City that
are not within proximity to wastewater infrastructure are identified unserved and likely use septic
systems. Figure 6 shows the parcel service type delineation in the City. Figures 7, 8, and 9 show
current septic areas, current sewer areas, and future sewer areas, respectively. Table 6 summarizes
the current served population,the population currently on septic(septic to sewer), and the future served
population based on the projection methods described above. The septic to sewer conversion flow is
included in the Build-Out projections therefore the volume will not be included after Table 6.
%able
Wastewater Service Connections Population' GPD MGD
Type
Existing Sewer' 13,912 34,919 2,150,000 2.150
Existing Septic2 945 2,372 - -
Existing Subtotal 14,857 37,291 2,150,000 2.150
Future GID Residential' 933 2,342 153,869 0.154
Future Septic to Sewer - - 136,881 0.137
80% Conversion 4
Future Served
(Undeveloped) - 600 1,500 98,550 0.099
Residential'
Future Residential 1,533 3,842 389,300 0.389
Subtotal
Future GID Commercial' - - 435,502 0.436
Future Total 16,390 41,133 2,974,802 2.975
1.Discharge Monitoring Report Data from January 2016-2021 and Billing Data
2.Septic parcels determined from City's GIS records
3.Residential=25%of developable area,65.7 gpd per capita
4.Septic to Sewer conversions to occur after the 20-year planning horizon
5.Future sewer parcels determined from both City's GIS records and Future Development Plan
6.Commercial=75%of developable area,0.1 gpd per sq ft
7.Calculated Population=2.51 per Connection per US Census(2015-2019)
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