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Mission Trails FRS II, Pipeline Tunnel
and Vent Demolition Project
Draft Environmental Impact Report
State Clearinghouse No. 2005041025
March 2006
Lead Agency:
San Diego County Water Authority
4677 Overland Avenue
San Diego, California 92123
Prepared by:
Tierra Environmental Services, Inc.
9915 Businesspark Avenue, Suite C
San Diego, California 92131
TABLE OF CONTENTS
Section Page
ACRONYMS AND ABBREVIATIONS ...................................................................................... ix
EXECUTIVE SUMMARY .......................................................................................................ES-1
ES.1 Project Objectives ..........................................................................................................ES-1
ES.2 Project Overview ...........................................................................................................ES-2
ES.3 Public Outreach Program...............................................................................................ES-3
ES.4 Areas of Controversy .....................................................................................................ES-5
ES.5 Issues to be Resolved .....................................................................................................ES-6
ES.6 Alternatives to the Project..............................................................................................ES-6
ES.7 Summary of Environmental Impacts, Mitigation Measures and Level of
Significance after Mitigation .........................................................................................ES-7
1.0 INTRODUCTION ........................................................................................................... 1-1
1.1 Project Background.............................................................................................. 1-1
1.2 Purpose and Use of the EIR ................................................................................. 1-2
1.3 Scoping Process ................................................................................................... 1-3
1.4 Document Organization ....................................................................................... 1-3
1.5 Incorporation by Reference.................................................................................. 1-4
1.6 Availability of the EIR......................................................................................... 1-4
2.0 PROJECT DESCRIPTION.............................................................................................. 2-1
2.1 Project Location and Environmental Setting ....................................................... 2-1
2.2 Project Objectives ................................................................................................ 2-2
2.3 Project Components ............................................................................................. 2-4
2.3.1 Flow Regulatory Structure....................................................................... 2-4
2.3.2 Pipeline Tunnels....................................................................................... 2-6
2.3.3 Vent Removal .......................................................................................... 2-8
2.3.4 San Diego River Crossing........................................................................ 2-8
2.4 Project Construction............................................................................................. 2-8
2.4.1 General Schedule ..................................................................................... 2-8
2.4.2 Staging Areas ......................................................................................... 2-10
2.4.3 Access Routes ........................................................................................ 2-11
2.4.4 FRS II Construction ............................................................................... 2-12
2.4.5 Pipeline Tunnel Construction ................................................................ 2-13
2.4.6 Pipeline Connections ............................................................................. 2-15
2.4.7 Vent and Blowoff Removal ................................................................... 2-16
2.4.8 Spoil Disposal ........................................................................................ 2-16
2.4.9 San Diego River Crossing Construction ................................................ 2-17
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2.5 Project Operation ............................................................................................... 2-17
2.5.1 FRS II Operation and Maintenance Procedures..................................... 2-17
2.5.2 Pipeline Tunnel Operation and Maintenance Procedures...................... 2-18
2.6 General Conditions/Standard Specifications and Project Design Features ....... 2-18
2.6.1 Aesthetics/Visual Quality ...................................................................... 2-18
2.6.2 Traffic/Circulation ................................................................................. 2-19
2.6.3 Air Quality ............................................................................................. 2-19
2.6.4 Noise and Vibration ............................................................................... 2-20
2.6.5 Recreation .............................................................................................. 2-21
2.6.6 Hydrology/Water Quality ...................................................................... 2-21
2.6.7 Biological Resources ............................................................................. 2-24
2.6.8 Geology and Soils .................................................................................. 2-26
2.6.9 Public Safety and Hazardous Materials ................................................. 2-28
2.6.10 Utilities and Public Services .................................................................. 2-31
2.7 Discretionary Actions and Approvals................................................................ 2-31
3.0 ENVIRONMENTAL ANALYSIS ............................................................................... 3.1-1
3.1 Land Use ........................................................................................................... 3.1-1
3.1.1 Existing Conditions............................................................................... 3.1-1
3.1.2 Thresholds of Significance ................................................................... 3.1-3
3.1.3 Impact Analysis .................................................................................... 3.1-4
3.1.4 Mitigation Measures ............................................................................. 3.1-8
3.1.5 Residual Impacts after Mitigation......................................................... 3.1-8
3.2 Aesthetics/Visual Quality ................................................................................. 3.2-1
3.2.1 Existing Conditions............................................................................... 3.2-1
3.2.2 Thresholds of Significance ................................................................... 3.2-2
3.2.3 Impact Analysis .................................................................................... 3.2-3
3.2.4 Mitigation Measures ............................................................................. 3.2-8
3.2.5 Residual Impacts after Mitigation......................................................... 3.2-8
3.3 Traffic/Circulation ............................................................................................ 3.3-1
3.3.1 Existing Conditions............................................................................... 3.3-1
3.3.2 Thresholds of Significance ................................................................... 3.3-6
3.3.3 Impact Analysis .................................................................................... 3.3-7
3.3.4 Mitigation Measures ........................................................................... 3.3-12
3.3.5 Residual Impacts after Mitigation....................................................... 3.3-12
3.4 Air Quality ........................................................................................................ 3.4-1
3.4.1 Existing Conditions............................................................................... 3.4-1
3.4.2 Thresholds of Significance ................................................................... 3.4-5
3.4.3 Impact Analysis .................................................................................... 3.4-5
3.4.4 Mitigation Measures ........................................................................... 3.4-10
3.4.5 Residual Impacts after Mitigation....................................................... 3.4-11
3.5 Noise and Vibration .......................................................................................... 3.5-1
3.5.1 Existing Conditions............................................................................... 3.5-1
3.5.2 Thresholds of Significance ................................................................... 3.5-4
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3.5.3 Impact Analysis .................................................................................... 3.5-4
3.5.4 Mitigation Measures ........................................................................... 3.5-11
3.5.5 Residual Impacts after Mitigation....................................................... 3.5-13
3.6 Recreation ......................................................................................................... 3.6-1
3.6.1 Existing Conditions............................................................................... 3.6-1
3.6.2 Thresholds of Significance ................................................................... 3.6-1
3.6.3 Impacts Analysis................................................................................... 3.6-2
3.6.4 Mitigation Measures ............................................................................. 3.6-3
3.6.5 Residual Impacts after Mitigation......................................................... 3.6-3
3.7 Water Resources ............................................................................................... 3.7-1
3.7.1 Existing Conditions............................................................................... 3.7-1
3.7.2 Thresholds of Significance ................................................................... 3.7-4
3.7.3 Impact Analysis .................................................................................... 3.7-5
3.7.4 Mitigation Measures ............................................................................. 3.7-9
3.7.5 Residual Impacts after Mitigation......................................................... 3.7-9
3.8 Biological Resources ........................................................................................ 3.8-1
3.8.1 Existing Conditions............................................................................... 3.8-1
3.8.2 Thresholds of Significance ................................................................. 3.8-11
3.8.3 Impact Analysis .................................................................................. 3.8-12
3.8.4 Mitigation Measures ........................................................................... 3.8-17
3.8.5 Residual Impacts after Mitigation....................................................... 3.8-20
3.9 Cultural Resources ............................................................................................ 3.9-1
3.9.1 Existing Conditions............................................................................... 3.9-1
3.9.2 Thresholds of Significance ................................................................... 3.9-3
3.9.3 Impact Analysis .................................................................................... 3.9-3
3.9.4 Mitigation Measures ............................................................................. 3.9-4
3.9.5 Residual Impacts after Mitigation......................................................... 3.9-5
3.10 Geology and Soils ........................................................................................... 3.10-1
3.10.1 Existing Conditions............................................................................. 3.10-1
3.10.2 Thresholds of Significance ................................................................. 3.10-5
3.10.3 Impact Analysis .................................................................................. 3.10-6
3.10.4 Mitigation Measures ........................................................................... 3.10-7
3.10.5 Residual Impacts after Mitigation....................................................... 3.10-7
3.11 Paleontological Resources .............................................................................. 3.11-1
3.11.1 Existing Conditions............................................................................. 3.11-1
3.11.2 Thresholds of Significance ................................................................. 3.11-2
3.11.3 Impact Analysis .................................................................................. 3.11-2
3.11.4 Mitigation Measures ........................................................................... 3.11-2
3.11.5 Residual Impacts after Mitigation....................................................... 3.11-3
3.12 Public Safety and Hazardous Materials .......................................................... 3.12-1
3.12.1 Existing Conditions............................................................................. 3.12-1
3.12.2 Thresholds of Significance ................................................................. 3.12-2
3.12.3 Impact Analysis .................................................................................. 3.12-2
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3.12.4 Mitigation Measures ........................................................................... 3.12-4
3.12.5 Residual Impacts after Mitigation....................................................... 3.12-5
3.13 Utilities and Public Services ........................................................................... 3.13-1
3.13.1 Existing Conditions............................................................................. 3.13-1
3.13.2 Thresholds of Significance ................................................................. 3.13-2
3.13.3 Impact Analysis .................................................................................. 3.13-3
3.13.4 Mitigation Measures ........................................................................... 3.13-7
3.13.5 Residual Impacts after Mitigation....................................................... 3.13-7
4.0 CUMULATIVE IMPACTS............................................................................................. 4-1
4.1 Introduction.......................................................................................................... 4-1
4.2 Cumulative Projects ............................................................................................. 4-1
4.3 Cumulative Impact Analysis................................................................................ 4-8
4.3.1 Land Use .................................................................................................. 4-8
4.3.2 Aesthetics/Visual Quality ........................................................................ 4-8
4.3.3 Traffic/Circulation ................................................................................... 4-9
4.3.4 Air Quality ............................................................................................. 4-10
4.3.5 Noise and Vibration ............................................................................... 4-11
4.3.6 Recreation .............................................................................................. 4-11
4.3.7 Water Resources .................................................................................... 4-12
4.3.8 Biological Resources ............................................................................. 4-12
4.3.9 Cultural Resources ................................................................................. 4-13
4.3.10 Geology and Soils .................................................................................. 4-13
4.3.11 Paleontological Resources ..................................................................... 4-13
4.3.12 Public Safety and Hazardous Materials ................................................. 4-14
4.3.13 Utilities and Public Services .................................................................. 4-14
5.0 GROWTH INDUCING EFFECTS.................................................................................. 5-1
6.0 OTHER MANDATORY CONSIDERATIONS.............................................................. 6-1
6.1 Effects Found Not to Be Significant.................................................................... 6-1
6.1.1 Environmental Effects Eliminated from Further Review ........................ 6-1
6.1.2 Effects Found Not to Be Significant During Environmental Analysis.... 6-3
6.1.3 Non-applicable Significance Thresholds ................................................. 6-6
6.2 Unavoidable Significant Effects .......................................................................... 6-8
6.2.1 Air Quality ............................................................................................... 6-8
6.2.2 Noise ........................................................................................................ 6-9
7.0 ALTERNATIVES............................................................................................................ 7-1
7.1 Introduction.......................................................................................................... 7-1
7.2 Alternatives Considered but Rejected.................................................................. 7-1
7.2.1 Alternative Location for FRS II............................................................... 7-2
7.2.2 Alternative Ingress/Egress Points and Truck Routes During
Project Construction................................................................................. 7-2
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7.2.3 Spoil Disposal in MTRP at the BMX Site ............................................... 7-3
7.3 No Project Alternative ......................................................................................... 7-4
7.4 Alternative to the FRS II Control Building.......................................................... 7-4
7.5 Alternative Tunnel Alignments............................................................................ 7-5
7.5.1 Combined Inlet and Outlet Tunnel from One Heading Alternative ........ 7-5
7.5.2 Inlet Tunnel and Trenched Outlet Pipeline.............................................. 7-6
7.6 Comparison of Project Alternatives..................................................................... 7-6
7.7 Environmentally Superior Alternative................................................................. 7-7
8.0 ORGANIZATIONS AND PERSONS CONSULTED.................................................... 8-1
9.0 LIST OF PREPARERS.................................................................................................... 9-1
10.0 REFERENCES .............................................................................................................. 10-1
APPENDICES
A Notice of Preparation and Comment Letters
B Traffic Technical Report
C Air Quality Technical Report
D Noise and Vibration Technical Report
E Biological Resources Technical Report
F Cultural Resources Technical Report
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LIST OF FIGURES
Figure Page
1-1 Regional Water Authority Facilities ............................................................................. 1-5
1-2 Existing Water Authority Facilities in MTRP .............................................................. 1-7
2-1 Project Vicinity ........................................................................................................... 2-33
2-2 Project Location .......................................................................................................... 2-35
2-3 Project Study Area ...................................................................................................... 2-37
2-4 Project Components .................................................................................................... 2-39
2-5 Site/Grading Layout for FRS II .................................................................................. 2-41
2-6 Simulation of FRS II Control Building....................................................................... 2-43
2-7 Tunnel Plan and Profile for Proposed Project............................................................. 2-45
2-8 Stabilized River Crossing ........................................................................................... 2-47
2-9 Visual Representation of Stabilized San Diego River Crossing................................. 2-49
2-10 Proposed Construction Access/Haul Routes............................................................... 2-51
2-11 Potential Disposal Site Locations ............................................................................... 2-53
3.1-1 Existing Land Use...................................................................................................... 3.1-9
3.1-2 On-Site and Surrounding Land Uses ....................................................................... 3.1-11
3.2-1 Locations of Key Observation Points ........................................................................ 3.2-9
3.2-2 Hemingway Avenue (KOP 1).................................................................................. 3.2-11
3.2-3 Jackson Drive/Mission Gorge Road (KOP 2).......................................................... 3.2-13
3.2-4 Visitor’s Center (KOP 3) ......................................................................................... 3.2-15
3.2-5 San Diego River Crossing (KOP 4) ......................................................................... 3.2-17
3.2-6 FRS Sites (KOP 5) ................................................................................................... 3.2-19
3.2-7 Rim Trail Panoramic View (KOP 6) ....................................................................... 3.2-21
3.2-8 Elliott Vents #4 and #5 (KOP 7).............................................................................. 3.2-23
3.2-9 Calle de Vida/Colina Drive Access Points (KOP 8)................................................ 3.2-25
3.2-10 Eastern Terminus of Clairemont Mesa Boulevard (KOP 9).................................... 3.2-27
3.2-11 Portobelo Drive/Belsara Access Point (KOP 10) .................................................... 3.2-29
3.2-12 North Tunnel Portal (KOP 11)................................................................................. 3.2-31
3.2-13 Simulated View of FRS II Site from Corte Playa Catalina
Looking East (KOP 12) ........................................................................................... 3.2-33
3.2-14 Rear Yard of Belsera Looking East Southeast Towards North Portal (KOP 13) .... 3.2-35
3.2-15 View of Belsera at Corner of Access Road and Water Authority
Right-of-Way (KOP 14) .......................................................................................... 3.2-37
3.2-16 West of Belsera Access Road (KOP 15) Looking Southeast .................................. 3.2-39
3.3-1 Existing Traffic Conditions Diagram....................................................................... 3.3-13
3.3-2 Existing Traffic Volumes......................................................................................... 3.3-15
3.3-3 Construction Traffic Clairemont Mesa /I-15 Route................................................. 3.3-17
3.3-4 Construction Traffic Santo /SR-52 Route................................................................ 3.3-19
3.3-5 Existing + Construction Traffic Volumes Clairemont Mesa /I-15 Route................ 3.3-21
3.3-6 Existing + Construction Traffic Volumes Santo /SR-52 Route............................... 3.3-23
3.3-7 School Locations in Project Vicinity ....................................................................... 3.3-25
3.6-1 MTRP Trails Map ...................................................................................................... 3.6-5
3.6-2 Potential Trail Closures During Construction............................................................ 3.6-7
3.6-3 Alternative Offsite Access Routes ............................................................................. 3.6-9
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Figure Page
3.7-1 100-Year Floodplain in Vicinity of the River Crossing........................................... 3.7-11
3.8-1 Biological Resources Map #1 .................................................................................. 3.8-21
3.8-2 Biological Resources Map #2 .................................................................................. 3.8-23
3.8-3 Biological Resources Map #3 .................................................................................. 3.8-25
3.8-4 Biological Resources Map #4 .................................................................................. 3.8-27
3.8-5 Aerial View of Proposed River Crossing................................................................. 3.8-29
3.10-1 Study Area Geology – Inlet Tunnel ......................................................................... 3.10-9
3.10-2 Study Area Geology – Outlet Tunnel .................................................................... 3.10-11
3.10-3 Study Area Geology – Stabilized River Crossing.................................................. 3.10-13
7-1 Two-vent Alternative to Access/Control Building ....................................................... 7-9
7-2 Tunnel Plan and Profile for Combined Inlet and Outlet Tunnel
from One Heading Alternative.................................................................................... 7-11
7-3 Inlet Tunnel and Trenched Outlet Pipeline Alternative.............................................. 7-13
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LIST OF TABLES
Table Page
ES-1 Summary of Environmental Impacts and Mitigation Measures .................................ES-8
2-1 Proposed Construction Schedule .................................................................................. 2-9
2-2 Construction Staging Area Footprint Size .................................................................. 2-10
2-3 Discretionary Actions and Approvals......................................................................... 2-32
3.3-1 Intersections in Study Area........................................................................................ 3.3-1
3.3-2 Street Segments in Study Area .................................................................................. 3.3-2
3.3-3 Existing Intersection Operations................................................................................ 3.3-3
3.3-4 Existing Street Segment Operations .......................................................................... 3.3-4
3.3-5 Level of Service Definitions for Signalized Intersections ......................................... 3.3-5
3.3-6 Segment ADT Counts ................................................................................................ 3.3-6
3.3-7 Project Construction Trip Generation........................................................................ 3.3-8
3.3-8 Estimated Maximum Daily Truck and Construction Employee Traffic.................... 3.3-8
3.3-9 Existing + Construction Traffic Intersection Operations........................................... 3.3-9
3.3-10 Existing + Construction Traffic Segment Operations.............................................. 3.3-11
3.4-1 Ambient Air Quality Standards ................................................................................. 3.4-3
3.4-2 Ambient Background Concentrations........................................................................ 3.4-4
3.4-3 Pollutant Emission Thresholds .................................................................................. 3.4-6
3.4-4 Individual Construction Phase Results for NOx and PM10 Where Maximum
Daily Emissions Would Exceed Thresholds.............................................................. 3.4-8
3.4-5 Estimated Potential Worst-Case Maximum Daily Construction Emissions.............. 3.4-8
3.5-1 Short-Term Sound Level Measurements ................................................................... 3.5-3
3.5-2 Long-Term (24-hour) Sound Level Measurements ................................................... 3.5-3
3.5-3 Thresholds for Interior and Exterior Noise Impacts .................................................. 3.5-5
3.5-4 Land Use Noise Thresholds ....................................................................................... 3.5-5
3.5-5 Sound Levels of Typical Noise Sources and Noise Environments............................ 3.5-6
3.5-6 Calculated Sound Levels from Construction/Demolition.......................................... 3.5-7
3.5-7 Calculated Traffic Sound Levels at 50 feet from Roadways ..................................... 3.5-9
3.5-8 Vibration Source Levels for Construction Equipment............................................. 3.5-11
3.8-1 Sensitive Species Potentially Occurring on the Project Site...................................... 3.8-3
3.8-2 Anticipated Permanent and Temporary Project Impacts ......................................... 3.8-12
3.8-3 Location of Project Impacts to Upland Habitats Relative to the
Water Authority ROW............................................................................................. 3.8-13
3.8-4 Impacts to Jurisdictional Habitats............................................................................ 3.8-16
3.8-5 Mitigation Requirements for Upland Impacts Inside of the ROW .......................... 3.8-19
3.8-6 Mitigation Requirements for Upland Impacts Outside of the ROW ....................... 3.8-19
3.8-7 Total Upland Habitat Mitigation Requirements ...................................................... 3.8-20
3.8-8 Mitigation for Impacts to Jurisdictional Habitats .................................................... 3.8-20
3.10-1 Soil Characteristics and Location in Project Area ................................................... 3.10-5
4-1 Cumulative Projects Considered................................................................................... 4-2
7-1 Comparison of Alternatives to Proposed Project.......................................................... 7-7
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Draft Acronyms
ACRONYMS AND ABBREVIATIONS
ADT Average Daily Trips
AM Morning time (12:00 midnight up to 12:00 noon)
AMSL Above Mean Sea Level
APCD Air Pollution Control District
APE Area of Potential Effect
AQIA Air Quality Impact Analysis
BMPs Best Management Practices
CAA Clean Air Act
CAAQS California Ambient Air Quality Standards
CAC Citizens’ Advisory Committee
Cal/OSHA California Occupational Safety and Health Administration
CDMG California Division of Mines and Geology
Caltrans California Department of Transportation
CAPCOA California Air Pollution Control Officers’ Association
CARB California Air Resources Board
CDFG California Department of Fish and Game
CEQA California Environmental Quality Act
cfs cubic feet per second
CHMA Crestridge Habitat Management Area
CIP Capital Improvement Program
CNEL Community Noise Equivalent Level
CNDDB California Natural Diversity Data Base
CNPS California Native Plant Society
CO Carbon Monoxide
Corps U.S. Army Corps of Engineers
cy cubic yards
dB decibels
dBA decibels (A-weighted)
DO Dissolved Oxygen
EIR Environmental Impact Report
EIS Environmental Impact Statement
EMS Emergency Medical Services
ERP Emergency Response Plan
F Fahrenheit
FEMA Federal Emergency Management Agency
FIRM Flood Insurance Rate Map
fps feet per second
FRS Flow Regulatory Structure
FTA Federal Transit Administration
FUDS Formerly Used Defense Site
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Draft Acronyms
HCP Habitat Conservation Plan
HVAC Heating, Ventilation, Air Conditioning
HU Hydrologic Unit
I-15 Interstate 15
in/sec inches per second
KOPs Key Observations Points
kV kilovolt
lbs/day pounds per day
Leq equivalent sound level
lf linear feet
LHD Load-Haul-Dump
LOS Level of service
MBTA Migratory Bird Treaty Act
MCAS Marine Corps Air Station
mg million gallon
mgd million gallons per day
MHPA Multi-Habitat Planning Area
MLP Moreno-Lakeside Pipeline
mph miles per hour
MRZ Mineral Resource Zones
MSCP San Diego Multiple Species Conservation Program
MSL Mean Sea Level
MTRP Mission Trails Regional Park
MWD Metropolitan Water District of Southern California
NAAQS National Ambient Air Quality Standards
NCCP Natural Communities Conservation Program
NO2 Nitrogen Dioxide
NOI Notice of Intent
NOx Nitrogen Oxides
NPDES National Pollutant Discharge Elimination System
O3 Ozone
OE Ordnance and Explosives
OSHA Federal Occupational Safety and Health Administration
Pb Lead
PCE Passenger Car Equivalence
PEIR Program Environmental Impact Report
PM Evening time (12:00 noon up to 12:00 midnight)
PM10 Particulates with an aerodynamic diameter less than 10 microns
PPV Peak Particle Velocity
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Draft Acronyms
ROC Reactive Organic Compounds
ROG Reactive Organic Gas
ROW Right of Way
RWQCB Regional Water Quality Control Board
SCADA Supervisory Control and Data Acquisition
SCAQMD South Coast Air Quality Management District
SCH State Clearinghouse
SDAB San Diego Air Basin
SDAPCD San Diego Air Pollution Control District
SDG&E San Diego Gas and Electric
SDRWQCB San Diego Regional Water Quality Control Board
SDUSD San Diego Unified School District
SO2 Sulfur Dioxide
SR-52 State Route 52
SWPPP Stormwater Pollution Prevention Plan
SWSAS Storm Water Sampling and Analysis Strategy
TBM Tunnel Boring Machine
TDS Total Dissolved Solids
TMDL Total Maximum Daily Load
TRB Transportation Research Board
USEPA U.S. Environmental Protection Agency
USFWS U.S. Fish and Wildlife Service
USGS United States Geological Survey
WDR Waste Discharge Requirements
WGCEP Working Groups on California Earthquake Probabilities
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