DRAFT ENVIRONMENTAL ASSESSMENT KALAELOA EAST ENERGY CORRIDOR Kalaeloa, ‘Ewa District, Island of O‘ahu, Hawai‘i DRAFT ENVIRONMENTAL ASSESSMENT KALAELOA EAST ENERGY CORRIDOR Kalaeloa, ‘Ewa District, Island of O‘ahu, Hawai‘i Tax Map Keys: 9-1-013:095 and 096; 9-1-069:003 Franklin D. Roosevelt Avenue and Tripoli Street in 9-1-013: no parcel number April 2014 Prepared for: Hawai‘i Community Development Authority Prepared by: Belt Collins Hawaii LLC 2153 North King Street, Suite 200 Honolulu, HI 96819 TABLE OF CONTENTS 1 Introduction ..........................................................................................................................................................................1-1 1.1 Purpose and Need ..................................................................................................................................................1-1 1.2 Environmental Review .........................................................................................................................................1-2 1.3 Proposed Agency Action and Accepting Agency .......................................................................................1-3 2 Proposed Action and Alternatives Considered ......................................................................................................2-1 2.1 Proposed Action ......................................................................................................................................................2-1 2.1.1 Connection to the Existing Hawaiian Electric Company System ...................................2-2 2.1.2 Corridor Along Essex Road ............................................................................................................2-2 2.1.3 Corridor Along Tripoli Street .......................................................................................................2-4 2.1.4 Corridor Along Gambier Bay Street-Bismark Sea Street ..................................................2-4 2.2 Project Schedule and Estimated Cost .............................................................................................................2-5 2.3 Alternatives Considered ......................................................................................................................................2-5 2.3.1 No Action Alternative .......................................................................................................................2-5 2.3.2 Alternative 1 – Underground Ductline Alternative .............................................................2-6 2.3.3 Alternative 2 – Coral Sea Road .....................................................................................................2-8 2.3.4 Alternative 3 – San Jacinto Street ...............................................................................................2-8 2.3.5 Alternative 4 – Keoneula Boulevard Extension ....................................................................2-9 3 Affected Environment .......................................................................................................................................................3-1 3.1 Land Use and Land Tenure .................................................................................................................................3-1 3.1.1 Existing Conditions ...........................................................................................................................3-1 3.1.2 Potential impacts and mitigation measures ...........................................................................3-3 3.2 Geology, Soils, and Topography .......................................................................................................................3-3 3.2.1 Existing Conditions ...........................................................................................................................3-3 3.2.2 Potential Impacts and Mitigation Measures ...........................................................................3-6 3.3 Hydrology ..................................................................................................................................................................3-6 3.3.1 Water Resources ................................................................................................................................3-6 3.3.2 Ground Water ......................................................................................................................................3-6 3.3.3 Surface Water ......................................................................................................................................3-9 3.3.4 Potential Impact and Mitigation Measures .............................................................................3-9 3.4 Archaeological and Cultural Resources ........................................................................................................3-9 3.4.1 Archaeological Resources ..............................................................................................................3-9 3.4.2 Cultural Resources ......................................................................................................................... 3-12 3.4.3 Potential Impacts and Mitigation Measures ........................................................................ 3-15 3.5 Flora and Fauna .................................................................................................................................................... 3-15 3.5.1 Flora ..................................................................................................................................................... 3-15 3.5.2 Fauna .................................................................................................................................................... 3-17 3.5.3 Probable Impacts and Mitigation Measures ........................................................................ 3-19 April 2014 KALAELOA EAST ENERGY CORRIDOR – Draft EA / i 3.6 Public Health and Safety ................................................................................................................................... 3-20 3.6.1 Flood Hazard .................................................................................................................................... 3-20 3.6.2 Tsunami Evacuation Zone ........................................................................................................... 3-21 3.6.3 Earthquake ........................................................................................................................................ 3-22 3.6.4 Brushfires ........................................................................................................................................... 3-23 3.6.5 Navigable Airspace ......................................................................................................................... 3-23 3.6.6 ElectroMagnetic Fields ................................................................................................................. 3-25 3.6.7 Hazardous and Regulated Materials ....................................................................................... 3-29 3.6.8 Probable Impacts and Mitigation Measures ........................................................................ 3-31 3.7 Air Quality ............................................................................................................................................................... 3-32 3.7.1 Existing Conditions ........................................................................................................................ 3-32 3.7.2 Probable Impacts and Mitigation Measures ........................................................................ 3-32 3.8 Noise ......................................................................................................................................................................... 3-33 3.8.1 Existing Conditions ........................................................................................................................ 3-33 3.8.2 Probable Impacts and Mitigation Measures ........................................................................ 3-33 3.9 Circulation and Traffic ....................................................................................................................................... 3-33 3.9.1 Existing Conditions ........................................................................................................................ 3-33 3.9.2 Future Roadway Improvements .............................................................................................. 3-36 3.9.3 Probable Impacts and Mitigation Measures ........................................................................ 3-36 3.10 Infrastructure ........................................................................................................................................................ 3-36 3.10.1 Water ................................................................................................................................................... 3-36 3.10.2 Sewer ................................................................................................................................................... 3-37 3.10.3 Electricity, Telephone, and Cable TV ...................................................................................... 3-37 3.10.4