COM 0753.000 2016-2018 - Laserfiche WebLink

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B. Soils and Topography The U.S.D.A Soil Survey Report identifies the soil on the subject site as "Olaa Series (OID)". This type of soil consists of well-drained silty clay loarns that formed in volcanic ash. The surface layer and subsoil are about 16 to 9 inches thick, respectively. Permeability is rapid, runoff is slow, and erosion hazard is slight. According to the Natural Resource Conservation Service's Land Study Bureau Overall Master Productivity Rating, the subject site does not have a rating classification as it is in the State Land Use "Urban" District. The subject site falls within the State Land Use "Urban" District and is not included in the; The Agriculture Lands of Importance to the State of Hawaii (ALISH) designation. As noted earlier, the topography of the site slopes in a west to east direction, with the lower portion being at the east end. The slope appears to be approximately 2 percent. C. Natural Hazards 1. Drainage The Federal Emergency Management Agency (FEMA) Flood Insurance Rate map (FIRM) identifies the majority of the project area as Zone "X" (areas outside of the 500-year flood). There are no existing drainage ways on the site. The applicant has not observed any significant runoff or erosion in the recent past on the subject site. Pursuant to County drainage requirements, appropriate drywell and/or similar means to capture runoff from any improvements will be built, if necessary, in conjunction with the appropriate permitting process. 2. Volcanic, EarthQuake and Tsunami Hazards According to the United States Geological Survey maps, the project site is located within Lava Flow Hazard Zone 3, on a scale of ascending risks 9 to 1, 9 being the lowest risk and 1 being the greatest risk. The Building Code designates the entire island of Hawai'i Earthquake Zone "D" and contains certain 6