Base flood elevation viewer

    • [DOC File]CHAPTER 1 - INTRODUCTION - Gila County Flood Threat ...

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      Shallow flooding is mapped based on historic flood experiences and a study of the topography. In some areas, the techniques used for riverine studies are used. The result will either be a BFE or a base flood depth (in feet above the ground). A shallow flooding study usually produces data for the base flood but not for the 10-year or other floods.

    • [DOC File]CHAPTER ONE - FEMA

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      Flood risk areas in the US are generally defined by the 100-year flood—an event that is expected to have a 100-year recurrence interval and, thus, a 1% chance of occurrence in any given year. It is important to understand that these extreme events are essentially independent, so it is possible for a community to experience two 100-year floods ...

    • [DOC File]EM USA Terms and Definitions - FEMA

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      Base Flood Elevations (BFEs) are typically shown on Flood Insurance Rate Maps (FIRMs).” (FEMA, Base Flood, 2007) Base Flood Elevation (BFE): “…the elevation of the crest of the base or 100-year flood, which is the level of flood that has a 1% chance of being equaled or exceeded in any given year. Also

    • [DOC File]Home | FEMA.gov

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      Jul 26, 2013 · 1. Flood Elevation Determination. Flood elevations shall normally be determined for the 10-, 50 , 100 , and 500-year floods, unless otherwise instructed by the Regional PO, and referenced to NGVD or NAVD. Flood elevations for riverine areas are normally determined by step-backwater computer models.

    • [DOC File]EROSION: IT’S ELEMENTARY DEAR TEACHER

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      Flood plain begins to develop both through lateral erosion and deposition of sediment. ... Gradient is the change in elevation of the streambed over distance. Boulders, ripples on the streambed and other obstacles in the streambed increase the friction that the water must overcome to flow downstream combine to slow the flow of the water ...

    • [DOC File]Home | FEMA.gov

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      If shaded: Area of 500-year flood; area subject to the 100-year flood with average depths of less than 1 foot or with contributing drainage area less than one square mile; and areas protected by levees from the base flood Zr Zirconium (symbol for) …

    • SECTION 1

      FEMA Flood Insurance Rate Maps (FIRMs) and Flood Insurance Studies (FISs) ... Determine the adverse impacts of each alternative with respect to the base flood elevation (BFE), floodway boundary, and local drainage. ... analyze existing visual resources and viewer response/exposure and any impacts expected from the project. Recommend and develop ...

    • www.arlingtonma.gov

      Base Flood Elevation or floodplain boundaries; Existing and proposed topography, structures, and other physical features (walls, paths, trees, wells, drainage and utility lines, etc.); Erosion Controls (silt fence and compost wattle)-only applicable in a Riverfront Area or Wetlands Buffer Zone; Utility lines (e.g. water, sewer, etc.)

    • [DOC File]Federal Emergency Management Agency

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      • Elevate the structure to or above the Base Flood Elevation. • Relocate the structure to a new site located outside of the 100-year floodplain, outside of any regulatory erosion zones, and in conformance with any other applicable state or local land use regulations.

    • [DOC File]Chapter 11

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      Check FEMA flood map(s) for the area in which the property is located. Notify VA and the lender if it appears that the property may not be eligible for VA appraisal because. it is proposed or new construction and there is an indication that the elevation of the lowest floor is below the base flood level (100-year flood level).

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