This Sanitary Sewer Collection System Master Plan provides long range planning of the wastewater collection system facilities for the Fountain Sanitation District (FSD).

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TABLE OF CONTENTS
  2004 Master Plan Enhancements    
  0 Introduction    
  1.0 Flow and Rainfall Monitoring    
  2.0 Hydraulic Model Update   Fig 2-1
  3.0 Colorado Centre Analysis   Fig 3-1
  4.0 Lift Station Analysis   Fig 4-1, Table 4-1
  5.0 Hydraulic Model Review    
  6a WWTP Process Evaluation    
  6b WWTP Options    
  7.0 Admin and Operations Analysis   Fig 7-1
       
    Appendix 1A    
    Appendix 2A    
    Appendix 2B    
    Appendix 2C    
       
1.0 Introduction   1-1
  1.1 Introduction 1-1
  1.2 Scope of Study 1-2
  1.3 Study Area

1-3
  1.4 Previous Reports

1-3
  1.5 Abbreviations 1-5
       
2.0 Wastewater Flows 2-1
  2.1 Introduction 2-1
  2.2 Flow Components 2-1
  2.3 Flow and Rainfall Monitoring Program 2-2
  2.3.1 Location of Monitoring Stations 2-2
  2.3.1.1 Temporary Flow Monitors 2-2
  2.3.1.2 Rainfall Gauges 2-5
  2.3.2 Flow and Rainfall Monitoring Equipment 2-5
  2.3.2.1 Temporary Flow Monitoring 2-5
  2.3.2.2 Rain Gauge Network 2-6
  2.3.3 Monitoring Methodology 2-6
  2.3.3.1 Pre-Installation Calibration 2-6
  2.3.3.2 Installation Procedures 2-6
  2.3.3.3 Monitoring 2-7
  2.3.3.3.1 Quality Assurance 2-7
  2.3.3.3.2 Flow Monitoring 2-7
  2.3.4 Preliminary Data Analysis and Review 2-8
  2.3.4.1 Flow Monitor Profiling and Calibration 2-8
  2.3.4.2 Subsystem Areas 2-10
  2.4 Rainfall Data Analysis 2-10
  2.4.1 Design Flow and Probability 2-10
  2.4.2 Analysis of Rainfall Data 2-11
  2.4.2.1 Background 2-11
  2.4.2.2 Monitored Rainfall 2-14
  2.5 Flow Data Analysis 2-16
  2.5.1 Flow Monitoring Data 2-16
  2.5.1.1 Determination of Average Daily Dry Weather Flow 2-16
  2.5.1.2 Determination of Infiltration 2-17
  2.5.1.3 Determination of Inflow 2-18
  2.5.2 Summary of Existing Flows 2-20
  2.6 Historical WWTP Flows 2-21
  2.6.1 Large User Flows 2-22
       
3.0 Population, Land Use, and Flow Projections 3-1
  3.1 Introduction 3-1
  3.2 Current Population 3-1
  3.3 Future Population 3-2
  3.4 Current and Future Land Use 3-4
  3.5 Future Wastewater Flow Projections 3-9
  3.5.1 Design Flow Curve 3-9
  3.5.2 Projected Wastewater Flows 3-11
       
4.0 Existing Facilities 4-1
  4.1 Introduction 4-1
  4.2 Wastewater Treatment Facility 4-1
  4.3 Collection System Facilities 4-3
  4.3.1 Sanitary Sewer Inventory 4-3
  4.3.2 Flow Split Manholes 4-4
  4.3.3 Wastewater Pumping Stations and Force Mains 4-4
  4.3.4 Colorado Centre Pumping Station and Force Main 4-5
       
5.0 Wastewater Treatment Plant Discussion 5-1
       
6.0 Collection System Evaluation 6-1
  6.1 Hydraulic Model 6-1
  6.2 Model Calibration 6-2
  6.3 Collection system Improvement Criteria 6-2
  6.4 Improvements Cost Basis 6-3
  6.5 Existing System Analysis for Peak Flow Conditions 6-5
  6.6 Design Year 2010 and Build-out Hydraulic Capacity Evaluation 6-7
  6.7

Compatibility of FSD's Maintenance Program with SSO Rule and CMOM Requirements

 6-11
  6.7.1 Sanitary sewer Overflow (SSO) Rule 6-12
  6.7.2 CMOM Regulations 6-12
  6.7.3 FSD System Evaluation 6-14
  6.7.3.1 FSD Questionnaire Response 6-14
  6.7.3.2 FSD Evaluation 6-15
  6.7.3.3

Impact of Proposed SSO Rule and CMOM Requirements on FSD's Operation

 6-16
       
7.0 Implementation Plan 7-1
  7.1 Introduction 7-1
  7.2 Relief Sewers 7-3
  7.3 Extension Sewers 7-5
  7.4 Pumping Stations and Force Mains 7-6
  7.5 SSO Rule and CMOM Program Requirements 7-8
  7.6 Wastewater Treatment Plant Hydraulic Capacity 7-9
  7.7 Summary of Costs 7-10


LIST OF TABLES - Tables can be found within the above listed documents
Table 2-1 Temporary Flow Metering Sites 2-5
Table 2-2 Rainfall Gauge Locations 2-5
Table 2-3 Temporary Monitoring Site Descriptions 2-8
Table 2-4 Developed Areas by Flow Monitor Drainage Area 2-10
Table 2-5 Probability of Non-Exceedance 2-11
Table 2-6 Historical Monthly Precipitation 2-12
Table 2-7 Rainfall Depth - Duration - Frequency Relationship, Fountain, CO 2-12
Table 2-8 Monitored Rainfall Totals 2-15
Table 2-9 Monitored Peak Rainfall Intensities vs. Duration for Selected Storms 2-15
Table 2-10 Subsystem ADDF and Peak Dry Weather Flow Summary 2-17
Table 2-11 ADDF and Total Infiltration Flows 2-18
Table 2-12 Summary of Inflow Parameters 2-19
Table 2-13 Existing System Flow Summary 2-20
Table 2-14 Historical WWTP Monthly Average Flows 2-21
Table 3-1 Year 2000 Population 3-2
Table 3-2 Future Population 3-3
Table 3-3 Known Planned Developments 3-5
Table 3-4 Future Land Use 3-7
Table 3-5 Land Use Based Unit Flow Rates 3-9
Table 3-6 Design Year Flow Projection Summary 3-11
Table 4-1 Modeled Pipe Length 4-4
Table 5-1 Projected ADF Flows 5-1
Table 6-1 Model Calibration - Peak 1-Year Storm Flows at Monitor Locations 6-2
Table 6-2 Wastewater Sewer Pipe Unit Construction Cost 6-4
Table 6-3 Wastewater Force Main Construction Costs 6-4
Table 6-4 Wastewater Pump Station Construction Cost 6-5
Table 6-5 Pipe Surcharge and Overloading Summary Existing System Analyses 6-7
Table 6-6 Pipe Surcharge and Overloading Summary Design Year 2010 Analyses 6-9
Table 6-7 Pipe Surcharge and Overloading Summary Build-out Analyses 6-11
Table 7-1 Recommended Relief Sewers 7-4
Table 7-2 Recommended Sewer Extensions 7-5
Table 7-3 Recommended Pump Station Improvements 7-8
Table 7-4 Recommended Force Main Improvements 7-8
Table 7-5 Summary of Probable Capital Costs 7-10

 

LIST OF FIGURES
Figure 1-1 Study Area 1-4
Figure 2-1 Flow Components 2-3
Figure 2-2 Flow Meter and Rain Gage Locations 2-4
Figure 2-3 Temporary Meter Subsystem Schematic 2-6
Figure 2-4 Rainfall Intensity - Duration - Frequency Relationship 2-14
Figure 3-1 Population Projections 3-3
Figure 3-2 Existing Land Use and Planned Subdivisions 3-6
Figure 3-3 Buildout Land Use 3-8
Figure 3-4 Design Flow Curve 3-10
Figure 4-1 Existing Facilities 4-2
Figure 6-1 Overloaded Sewers for the 5-Year Storm Event 6-6
Figure 6-2 Overloaded Sewers for the Year 2010 5-Year Storm PWWF 6-8
Figure 6-3 Overloaded Sewers for the Build-out Condition 5-Year Storm PWWF 6-10
Figure 7-1 Implementation Plan 7-2

 

LIST OF APPENDICES
Appendix A Detailed Tabulation of Land Use Sub-Areas
Appendix B

Improvement Criteria and Modeling Parameters
Appendix C

Model Results - Existing System Dry Weather
Appendix D

Model Results - Existing System 5-Year Storm
Appendix E

Model Results - Year 2010 5-Year Storm
Appendix F

Model Results - Build-Out 5-Year Storm
Appendix G

CIP Cost Detail - Relief Sewers
Appendix H CIP Cost Detail - Extension Sewers


 
 
 
Fountain Sanitation District
901 S. Sante Fe Avenue  •  Fountain, CO   •  80817
Phone: 719-382-5303   •  Fax: 719-382-3441
FSDistrict@QwestOffice.net