COM 0027.000 2018-2020 - 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 approximately 98 percent "Panaewa very cobbly hydrous loam" with 2 to 10 percent slopes. This type of soil consists of moderately well-drained cobbly hydrous loams that formed,in volcanic ash over pahoehoe lava to a depth of approximately 26-inches. Permeability is moderate, runoff is high, and the erosion hazard appears to be moderate. The remaining 2 percent of the soil on the site is located at various points along the edges of the property and consists of "Panaewa-Urban land complex" with 2 to 10 percent slopes and has the same basic make up as the "Panaewa very cobbly hydrous loam." According to the Natural Resource Conservation Service's Land Study Bureau Overall Master Productivity Rating, the subject site does not have a rating or classification as it is in the State Land Use "Urban" District. Because the subject site falls within the State Land Use "Urban" District, it is not included in The Agriculture Lands of Importance to the State of Hawaii (ALISH) designation. As noted earlier, the topography of the site slopes in a south to north direction, with the lower portion being at the southern end. The slope appears to be approximately 7 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 is a small portion of the subject property identified on Figure 2 showing an "AO" flood zone on a portion of proposed lot 19. The referenced "AO" zone will not affect drainage issues with the proposed subdivision. 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. 6