Addressing Flooding Issues in Guam: 2020 Findings and Recommendations
Detailed findings from Guam's public agencies highlight major gaps in addressing flooding, such as lacking subdivision drainage requirements, minimal development standards for homeowners, and insufficient post-construction problem mitigation. Recommendations include density restrictions, low impact development standards, and policy changes to enhance flood control efforts.
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Presentation Transcript
Flooding Flooding Recap of 2020 findings Recap of 2020 findings Guam Department of Public Works Guam Environmental Protection Agency Guam Department of Land Management
A typical scenario A typical scenario
Unplanned development and flooding Assembly of Planners 2020
Summary: Major gaps Subdivision drainage requirements do not apply to piecemeal parceling Minimal development requirements for individual homeowners Little to no ability to address post- construction problems Flooding not explicitly addressed by any agency Assembly of Planners 2020
Recommendations Requirements for developers: Density restrictions for development without infrastructure Impermeable area limits Low impact development (LID) standards for homes Design standards for fences/walls Changes to review process: Use of mapping tools in permitting process DPW drainage review for every lot Policy Changes: Clearly designate lead flood control agency Change rules to require maintenance and retroactive installation Funding Establish Stormwater Utility w/ funding mechanisms for maintenance, capital investment Assembly of Planners 2020
Development density Conditional based on infrastructure For example, max density of 1 home per acre unless: Drainage infrastructure provided Sewer infrastructure provided Assembly of Planners 2020
Residential LID (low impact development) Source: 2006 CNMI & Guam Stormwater Management Manual Assembly of Planners 2020
