COM 0938.000 1996-1998 - Laserfiche WebLink

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The subject area is located at an elevation of approximately the 450 feet above mean sea level. The area has a 0-20 percent slope. The mean annual rainfall in the area ranges between 100 to 175 inches. The United States Geological Survey (USGS) classifies the area as within Lava Flow Hazard Zone 3 on a scale of 1 (most hazardous) to 9 (least hazardous). Zone 3 is the same classification for the entire City of Hilo. The entire island of Hawaii is within Earthquake Hazard Zone 3, which is the zone of highest seismic occurrence and danger. The subject area is located over 3 miles from the ocean and therefore, it is located outside of the Civil Defense's Tsunami Evacuation Zone. According to the Federal Emergency Management Agency Flood Insurance Rate Maps (FIRM), the subject area is located within Zone X, area determined to be outside the 500 -year flood plain. (See Figure 3) As part of the subdivision requirements for the final approval of the Machado Acres Subdivision, drainage improvements have been installed in accordance with the Department of Public Works. Soils on the subject area are identified by the Soil Survey Report of the Island of Hawaii as Olaa Very Stony Clay Loam (OID) and Panaewa Very Rocky Silty Clay Loam (PcQ Series. (See Figure 4) The Olaa series consists of well -drained silty clay loams that formed in volcanic ash. Olaa soils are used for the production of sugarcane. The Panaewa series consists of shallow, moderately well -drained silty clay loams that formed in volcanic ash. Panaewa soils are used for sugarcane, pasture, and woodland. In both soil series, the permeability is rapid, runoff is slow, and the erosion hazard is slight. W.'Vel 1361 anlyde-11i: OJON F411610113mel1 l• U Using a five level productivity rating from A (highest) to E (lowest), the 1967 Detailed Land Classification from the Land Study Bureau categorized the subject area as "C" or Fair. (See Figure 5) -5-