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This dataset shows areas of Mercer Island that are infeasible for infiltration based on the overlap of erosion hazard areas, landslide hazard areas, and steep slopes (> 20%). This analysis was completed in January 2018 by Herrera Consulting as part of the Infiltration Infeasibility Study project (project manager for City: Patrick Yamashita, City Engineer). This dataset is for planning purposes only and additional considerations (depth to groundwater, infiltration setbacks from environmental and site features, and site soils) should be assessed on a site-by-site basis based on the specific criteria for the BMP under consideratioin.. |