HDOT Climate Resilience Action Plan | May 2021

» EP 1100-2-1, Procedures to Evaluate Sea Level Change: Impacts, Responses, and Adaptation. June 30, 2019. Accessed July 27, 2020 from: https://www.publications.usace.army.mil/Portals/76/Users/182/86/2486/EP-1100-2-1.pdf?ver=2019-09-13- 141310-707 Instructional and procedural guidance to analyze and adapt to the direct and indirect physical and ecological effects of future projected future sea level rise. Integrates the recommended planning and engineering to understand and adapt to impacts of projected sea level change through a hierarchy of decisions and review points that identify the level of analysis required as a function of project type, planning horizon, and potential consequences. » Engineer Regulation (ER) 1105-2-101, Risk Assessment for Flood Risk Management Studies . July 15, 2019. Accessed July 27, 2020 from: https://www.publications.usace.army.mil/Portals/76/Users/182/86/2486/ER%201105-2- 101_Clean.pdf?ver=2019-10-17-144237-503 Guidance on risk assessment requirements for flood management studies including, but not limited to, feasibility studies, post-authorization changes, general reevaluation studies, dam and levee safety studies, and major rehabilitation studies. A risk framework is recommended that comprises three tasks: risk assessment, risk communication, and risk management. » Engineering and Construction Bulletin (ECB) 2019-8, Managed Overtopping of Levee Systems. April 24, 2019. Engineering and Construction Bulletin 2019-8. Accessed July 27, 2020 from: https://www.wbdg.org/FFC/ARMYCOE/COEECB/ecb_2019_8.pdf Engineering guidance on setting top of levee profile, determining overtopping reach length and depth, and considering resiliency measures in the overtopping reach. Provides a methodology for configuring the engineered capacity exceedance related to flood overtopping at a specific location or locations along the levee system. » Guidance for Incorporating Climate Change Impacts to Inland Hydrology in Civil Works Studies, Designs, and Projects. September 10 , 2018.Accessed July 27, 2020 from: https://www.wbdg.org/FFC/ARMYCOE/COEECB/ecb_2018_14.pdf Applies to all hydrologic analyses supporting planning and engineering decisions having an extended decision time frame (i.e., not for short-term water management decisions). Requires consideration of climate change in all current and future studies to reduce vulnerabilities and enhance the resilience of communities. » Use of Natural and Nature-Based Features (NNBF) for Coastal Resilience. 2015. Report SR-15-1. U.S. Army Engineer Research and Development Center, Environmental Laboratory, Coastal and Hydraulics Laboratory. Accessed July 27, 2020 from: https://cdm16021.contentdm.oclc.org/digital/collection/p266001coll1/id/3442 This report describes the use of NNBF to improve coastal resilience and was designed to support post- Hurricane Sandy recovery efforts under the North Atlantic Coast Comprehensive Study. An integrative framework is offered that focuses on classifying NNBF, characterizing vulnerability, developing performance metrics, incorporating regional sediment management, monitoring and adaptively managing from a systems perspective, and addressing key policy challenges.

( B-12 ) HAWAI‘ I HIGHWAYS | CLIMATE ADAPTATION ACTION PLAN