Credit: Newsday / John Paraskevas)II PHASE TWO: ROCKAWAY BEACH BRANCH / JFK ONE SEAT RIDE RAIL STUDY LIRR CONTRACT 6168C-10-09, RELEASE “A” Submitted by: In Association With: 520 Eighth Avenue, Suite 2100 New York, NY 10018 September 21, 2018 Table of Contents 1. INTRODUCTION .................................................................................................................................................................... 4 1.1 PROJECT GOALS AND OBJECTIVES................................................................................................................................... 4 2. PRELIMINARY ALTERNATIVES ANALYSIS .................................................................................................................................. 5 2.1 PRELIMINARY FEASIBILITY ANALYSIS .............................................................................................................................. 5 2.2 SELECTION OF ALTERNATIVES FOR FURTHER ANALYSIS.................................................................................................. 6 2.2.1. RBB North and South Alignments .............................................................................................................................. 6 3. DETERMINATION OF ENGINEERING FEASIBILITY AND CONSTRUCTABILITY ............................................................................ 6 3.1 TRACK ............................................................................................................................................................................. 6 3.2 GEOTECHNICAL ............................................................................................................................................................... 8 3.3 STRUCTURES/VIADUCT ................................................................................................................................................. 10 3.3.1. North of Howard Beach ............................................................................................................................................ 10 3.3.1.1 Viaduct Constructability ................................................................................................................................. 10 3.3.1.2. JFK Terminal Station Constructability ........................................................................................................... 12 3.3.2. Hybrid Constructability .......................................................................................................................................... 16 3.3.2.1. Westbound Viaduct ........................................................................................................................................ 16 3.3.2.2. Eastbound Viaduct ......................................................................................................................................... 17 3.3.2.3. Outbound Track ............................................................................................................................................. 17 3.4 TUNNEL ......................................................................................................................................................................... 18 3.4.1. Scope ........................................................................................................................................................................ 18 3.4.2. Geotechnical Setting ................................................................................................................................................ 18 3.4.3. Tunnel Engineering Constructability ........................................................................................................................ 18 3.4.3.1. South of Howard Beach Alignment ............................................................................................................... 18 3.4.3.2. North of Howard Beach Alignment ............................................................................................................... 19 3.4.3.3. General Design Conditions ............................................................................................................................. 19 3.5 CENTRAL TERMINAL AREA (CTA) STATION – TYPICAL STATION COMPONENTS ............................................................ 21 3.5.1. Overall Station Intent ............................................................................................................................................... 21 3.5.2. Station Platforms ...................................................................................................................................................... 21 3.5.3. Station Mezzanine .................................................................................................................................................... 21 3.5.4. Station Ventilation ................................................................................................................................................... 21 3.5.5. Proposed Concept .................................................................................................................................................... 21 3.6 SIGNALS AND INTERLOCKINGS ...................................................................................................................................... 22 3.7 POWER .......................................................................................................................................................................... 22 4. ENVIRONMENTAL CONDITIONS ............................................................................................................................................. 22 4.1 CULTURAL RESOURCES ................................................................................................................................................. 22 1 4.1.1. North of Howard Beach On-Airport Sub-Alignment ................................................................................................. 23 4.1.2. South of Howard Beach On-Airport Sub-Alignment ................................................................................................. 23 4.1.3. Summary .................................................................................................................................................................. 23 4.2 HAZARDOUS MATERIALS AND WASTE .......................................................................................................................... 23 4.2.1. North of Howard Beach On-Airport Sub-Alignment ................................................................................................. 23 4.2.2. South of Howard Beach On-Airport Sub-Alignment ................................................................................................. 23 4.2.3. Summary .................................................................................................................................................................. 24 4.3 NATURAL RESOURCES ................................................................................................................................................... 24 4.3.1. North of Howard Beach On-Airport Sub-Alignment ................................................................................................. 24 4.3.2. South of Howard Beach On-Airport Sub-Alignment ................................................................................................. 24 4.3.3. Summary .................................................................................................................................................................. 25 4.4 SOLE SOURCE AQUIFER, COASTAL ZONE MANAGEMENT AND FLOODPLAINS .............................................................. 25 4.4.1. North of Howard Beach On-Airport Sub-Alignment ................................................................................................. 25 4.4.2. South of Howard Beach On-Airport Sub-Alignment ................................................................................................. 25 4.4.3. Summary .................................................................................................................................................................. 25 4.5 AIR, NOISE AND VIBRATION CONSIDERATIONS............................................................................................................. 26 4.5.1. North of Howard Beach On-Airport Sub-Alignment ................................................................................................. 26 4.5.2. South of Howard Beach On-Airport Sub-Alignment ................................................................................................. 26 4.5.3. Summary .................................................................................................................................................................. 26 4.6 PARKS, COMMUNITY FACILITIES AND VISUAL IMPACTS............................................................................................... 26 4.6.1. North of Howard Beach On-Airport Sub-Alignment ................................................................................................. 27 4.6.2. South of Howard Beach On-Airport Sub-Alignment ................................................................................................. 27 4.6.3. Summary .................................................................................................................................................................