Draft Environmental Assessment Hilo Bayfront Trails
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DRAFT ENVIRONMENTAL ASSESSMENT HILO BAYFRONT TRAILS Hilo, County of Hawai‘i, State of Hawai‘i January 2010 Prepared for: Hawai‘i County Department of Research and Development 25 Aupuni Street Hilo, Hawai‘i 96720 DRAFT ENVIRONMENTAL ASSESSMENT HILO BAYFRONT TRAILS (3rd. Division): 2-1-1:012, 102; 2-1-3:001, 019; 2-1-5:001; 2-1-6:010; 2-1-9:007; 2-2-2:001, 027, 035; 2-2-3:003, 046; 2-2-4:001, 002, 025, 028, 035, 056, 060; 2-2-5: 002; 2-2-6:001, 026, 027; 2-2-7:018; 2-2-11:001; 2-2-12:016; 2-2-13:003; 2-2- 14:002; 2-2-29:001, 008, 027; 2-2-31:001, 015; 2-2-53:019, 020, 023; 2-3-1:002 and 2-3-4:001; Various County and State rights-of-way adjacent to above parcels South Hilo District, County of Hawai‘i, State of Hawai‘i PROPOSING/ APPROVING AGENCY: County of Hawai‘i Department of Research and Development 25 Aupuni Street Hilo, Hawai‘i 96720 CONSULTANT: Geometrician Associates LLC PO Box 396 Hilo, Hawai‘i 96721 CLASS OF ACTION: Use of County Land and Funds Use of State Land This document is prepared pursuant to: The Hawai‘i Environmental Protection Act, Chapter 343, Hawai‘i Revised Statutes (HRS), and Title 11, Chapter 200, Hawai‘i Department of Health Administrative Rules (HAR). TABLE OF CONTENTS SUMMARY............................................................................................................................ iii PART 1: PROJECT LOCATION, PURPOSE AND NEED AND DESCRIPTION ..... 1 1.1 Project Location and Purpose and Need .......................................................... 1 1.1.1 Project Location and Background........................................................ 1 1.1.2 Project Purpose and Need .................................................................... 4 1.2 Project Description........................................................................................... 4 1.3 Environmental Assessment Process ................................................................ 20 1.4 Public Involvement and Agency Coordination ............................................... 20 1.5 Property Ownership ....................................................................................... 21 1.6 Cost and Funding ............................................................................................ 23 1.7 Implementation ............................................................................................... 23 PART 2: ALTERNATIVES............................................................................................ 27 2.1 No Action ........................................................................................................ 27 2.2 Alternatives Evaluated and Dismissed From Further Consideration ............. 27 PART 3: ENVIRONMENTAL SETTING, IMPACTS AND MITIGATION ................ 28 3.1 Physical Environment ....................................................................................... 28 3.1.1 Geology, Soils and Geologic Hazard.................................................... 28 3.1.2 Water Features and Water Quality........................................................ 29 3.1.3 Drainage and Flooding ......................................................................... 32 3.1.4 Flora and Fauna .................................................................................... 34 3.1.5 Climate, Air Quality, Noise and Scenic Resources .............................. 38 3.1.6 Hazardous Substances, Toxic Waste and Hazardous Conditions......... 39 3.2 Socioeconomic and Cultural ............................................................................ 40 3.2.1 Socioeconomic Characteristics and Recreation ................................... 40 3.2.2 Cultural Resources .............................................................................. 44 3.2.3 Archaeological Resources..................................................................... 45 3.3 Infrastructure .................................................................................................... 47 3.3.1 Utilities ................................................................................................. 47 3.3.2 Transportation Facilities ...................................................................... 48 3.4 Secondary and Cumulative Impacts.................................................................. 51 3.5 Required Permits and Approvals ...................................................................... 52 3.6 Consistency With Government Plans and Policies........................................... 53 3.6.1 Hawai‘i State Plan................................................................................. 53 3.6.2 Hawai‘i County General Plan and Zoning .......................................... 53 3.6.3 Hawai‘i State Land Use Law ............................................................... 57 PART 4: DETERMINATION ......................................................................................... 57 PART 5: FINDINGS AND REASONS........................................................................... 58 REFERENCES ........................................................................................................................ 60 i Hilo Bayfront Trails Environmental Assessment LIST OF TABLES TABLE 1 Interpretive Sites of the Hilo Bayfront Trails Project....................................... 12 TABLE 2 Cost Estimate for Trail Action Design and Construction ................................. 24 TABLE 3 Exceptional Trees in the Project Area ............................................................. 35 TABLE 4 Bird Species Observed in Project Area ............................................................ 37 TABLE 5 Areas of Natural Beauty Noted in Hawai‘i County General Plan .................... 39 TABLE 6 Selected Socioeconomic Characteristics........................................................... 40 LIST OF FIGURES FIGURE 1 Project Location Airphoto Map ........................................................................ 2 FIGURE 2 Photos of Locations in Hilo Bayfront Trails Planning Area............................. 3 FIGURE 3 Master Plan ....................................................................................................... 7 FIGURE 4a Typical Trail Section......................................................................................... 9 FIGURE 4b Planned Shared Use Path on the Makai Side of Wailoa Bridge ....................... 9 FIGURE 4c Conceptual Trailhead Signage and Logo.......................................................... 10 FIGURE 5 Section Elevation Illustrating Design Guidelines for Shared Use Paths .......... 15 FIGURE 6 Maile Street Connection to Waiākea Villas...................................................... 22 FIGURE 7 Project Area Flood Hazard Areas ..................................................................... 33 APPENDIX 1a Responses to Early Consultation APPENDIX 2 Property Identification, Ownership, Use, and Action Phasing APPENDIX 3 Plant Species Observed on Project Site APPENDIX 4a Cultural Impact Assessment APPENDIX 4b Archaeological Assessment ii Hilo Bayfront Trails Environmental Assessment SUMMARY OF THE PROPOSED ACTION, ENVIRONMENTAL IMPACTS AND MITIGATION MEASURES The Hilo Bayfront Trails Project would provide a variety of multimodal paths, pedestrian sidewalks, dedicated bicycle lanes, and shared roads for bicycles spanning the approximately two-mile distance between Hilo Harbor and the Wailuku River in Downtown Hilo. The project also includes loops for downtown, Wailoa River State Park and Bayfront Beach Park. The Hilo Bayfront Trails would provide a cohesive system of non-motorized transportation opportunities between Hilo Harbor and Downtown Hilo for both tourists and residents. It would complement and enhance the attributes of the Hilo Bayfront: dramatic views of Hilo Bay and Mauna Kea, green spaces, historical interest, cultural and community events, and a variety of recreational activities. Aside from the trails themselves, the project would build several new parking areas and interpretive signs denoting areas of interest. The project directly involves 40 separate parcels of land and rights-of-way within 17 named County and State roadways. Landowners, businesses, citizen organizations and the general public have participated in developing the project in a series of meetings. Best management practices will be implemented to prevent erosion and sedimentation. The area is subject to both riverine and coastal flooding, including tsunami, but is already heavily used for recreation; structures are minimal, and no inappropriate development of floodplains or high hazard areas would occur. Valuable biological resources will not be adversely affected. The project has been designed with community input to enhance cultural resources and practices, which will be benefit from better and safer pedestrian and bicycle facilities. Signage explaining the significance of Hawaiian land divisions, historic events and current practices will increase resident and visitor understanding and appreciation of the host culture. The County will require that archaeological monitoring take place during any construction involving surface alteration. If archaeological resources, cultural items or human remains are encountered during development of the project site, work in the immediate area of the discovery will be halted and the State Historic Preservation Division will be contacted. iii Hilo Bayfront Trails Environmental Assessment PART 1: PROJECT LOCATION, PURPOSE AND NEED AND DESCRIPTION