Dredging at Lagoon Intake Structure Initial Study
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DREDGING AT LAGOON INTAKE STRUCTURE INITIAL STUDY City of Foster City September 16, 2016 1 2 SEPTEMBER 2016 FOSTER CITY DREDGING AT LAGOON INTAKE STRUCTURE INITIAL STUDY TABLE OF CONTENTS PROJECT DESCRIPTION ........................................................................................................ 5 ENVIRONMENTAL FACTORS POTENTIALLY AFFECTED ....................................................... 27 ENVIRONMENTAL CHECKLIST ............................................................................................ 29 I. Aesthetics .......................................................................................................... 30 II. Agriculture and Forest Resources ...................................................................... 52 III. Air Quality .......................................................................................................... 54 IV. Biological Resources .......................................................................................... 74 V. Cultural Resources ........................................................................................... 111 VI. Hydrology and Water Quality............................................................................ 116 VII. Hazards ........................................................................................................... 136 VIII. Geology and Soils ............................................................................................ 146 IX. Greenhouse Gas Emissions .............................................................................. 156 X. Land Use and Planning ..................................................................................... 161 XI. Mineral Resources ............................................................................................ 167 XII. Noise ............................................................................................................... 168 XIII. Population and Housing ................................................................................... 191 XIV. Public Services ................................................................................................. 192 XV. Recreation ........................................................................................................ 193 XVI. Transportation/Traffic ..................................................................................... 196 XVII. Utilities and Service Systems ............................................................................ 198 XVIII. Mandatory Findings of Significance .................................................................. 200 i FOSTER CITY DREDGING AT LAGOON INTAKE STRUCTURE SEPTEMBER 2016 INITIAL STUDY REPORT PREPARERS ......................................................................................................... 204 REFERENCES .................................................................................................................... 206 ii SEPTEMBER 2016 FOSTER CITY DREDGING AT LAGOON INTAKE STRUCTURE INITIAL STUDY List of Tables Table 1 Summary of Proposed Construction Equipment ......................................... 64 Table 2 Summary of Average Daily Criteria Pollutant Emissions During Dredging and Disposal Options 1and 4 ..................................................... 65 Table 3 Summary of Average Daily Criteria Pollutant Emissions During Dredging and Disposal Options 2 and 5 .................................................... 68 Table 4 Summary of Average Daily Criteria Pollutant Emissions During Dredging and Disposal Option 3 ............................................................... 70 Table 5 Scientific Names of All Common Animal Species Mentioned in the Text .......................................................................................................... 81 Table 6 Summary of GHG Emissions during Project Construction ........................ 159 Table 7 Definition of Acoustical Terms ................................................................ 169 Table 8 Noise levels from construction equipment used during dredging............ 177 Table 9 Noise levels from construction equipment used in Disposal Options 2, 3, and 5 ................................................................................. 178 Table 10 Noise levels from construction equipment used in Disposal Option 1 ............................................................................................................. 180 Table 11 Noise levels from construction equipment used in Disposal Option 4 ............................................................................................................. 182 Table 12 Vibration Source Levels for Construction Equipment ............................... 184 Table 13 Vibration Criteria to Prevent Disturbance – RMS (Vdb) ............................. 185 Table 14 Vibration Criteria to Prevent Damage to Structures ................................. 186 Table 15 Vibration Source Levels for Construction Equipment ............................... 188 List of Figures Figure 1 Project Vicinity ............................................................................................ 7 Figure 2 Project Site .................................................................................................. 8 Figure 3 Disposal Options 1 and 4 .......................................................................... 10 Figure 4 Disposal Locations .................................................................................... 11 Figure 5 Cullinan Ranch Disposal Site Loction ......................................................... 15 iii FOSTER CITY DREDGING AT LAGOON INTAKE STRUCTURE SEPTEMBER 2016 INITIAL STUDY Figure 6 Montezuma Disposal Site Location ............................................................ 16 Figure 7 Alcatraz Disposal Site Location .................................................................. 18 Figure 8 Typical Dredging Equipment...................................................................... 22 Figure 9 Photo Locations ......................................................................................... 31 Figure 10 Site Photos, Western and Easter Views ....................................................... 33 Figure 11 Site Photo, Western Intake Structure .......................................................... 34 Figure 12 Site Photos, Views of Sea Cloud Phase II site ............................................. 35 Figure 13 Site Photos, Sea Cloud Phase II site from Sea Cloud Park ........................... 36 Figure 14 Scenic Views from Sea Cloud Phase II Site .................................................. 38 Figure 15 Vegetative Communities at the Project Site ............................................... 77 Figure 16 2004 Foster City Dredge Disposal Mitigation Site ...................................... 80 Figure 17 Wetlands and Waters of the U.S. Potentially Subject to USACE Jurisdiction ................................................................................................ 87 Figure 18 Proposed Maintenance Dredging Project Site plan ..................................... 94 Figure 19 Impacts to Waters of the U.S. ................................................................... 104 Appendices Appendix 1: Air Quality iv SEPTEMBER 2016 FOSTER CITY DREDGING AT LAGOON INTAKE STRUCTURE INITIAL STUDY PROJECT DESCRIPTION 1. Project Title: Dredging at the Lagoon Intake Structure (CIP 301-629) 2. Lead Agency Name and Address: City of Foster City Community Development Department 610 Foster City Boulevard Foster City, CA 94404 3. Contact Person and Phone Number: Kohar Kojayan Planning Manager [email protected] 650-286-3237 4. Project Location: The project site is located within Angelo Slough (also referred to as the West Intake Channel), west of Sea Cloud Park in Foster City, San Mateo County, and west of Angelo Slough adjacent to Sea Cloud Park (APNs 097-080-050 and 097-080-030). Project Sponsor’s Name and Address: City of Foster City Community Development Department/Public Works Department 610 Foster City Boulevard Foster City, CA 94404 5. General Plan Designation: The land portion of the dredging and staging sites as well as two of the potential disposal sites (Sea Cloud Phase II sedimentation basin and Sea Cloud Park upland disposal) are designated Parks and Recreation or Open Space. The staging area is designated Parks and the paved bike and pedestrian path, which connects Sea Cloud Park to the Levee Pedway and Wheel House Lane, is designated Open Space. The area 5 FOSTER CITY DREDGING AT LAGOON INTAKE STRUCTURE SEPTEMBER 2016 INITIAL STUDY along the levee immediately adjacent to Angelo Slough, including the Levee Pedway, is designated Open Space. The in-water portion is designated Water. 6. Zoning: The land portion of the dredging and staging sites as well as two of the potential disposal sites (Sea Cloud Phase II sedimentation basin and Sea Cloud Park upland disposal) are zoned Open Space and Conservation (OSC). The levee and water areas, including the Levee Pedway, are zoned Open Space and Conservation with Aquatic (OSC/W). 7. Description of Project: The following project description details the location of the project site, surrounding land uses, project components, and background about the regulatory requirements to complete the project as proposed. Project Site The Dredging at the Lagoon Intake Structure project (proposed project) would involve construction activity at the following