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Title:
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FINDING: POTENTIAL CAs
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Wording
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The application was reviewed by Jefferson County Permit Center staff on 5/15/00 for the potential presence of critical areas regulated under the provisions of the Ordinance, and the following critical areas were confirmed as potentially present on the subject property: Seismic Hazard, Suseptible Aquifer Recharge Area, Shoreline.
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Title:
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FINDING: CONFIRMED CAs
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Wording
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Acting upon the above information, Jefferson County staff conducted a site inspection of the subject property on May 23, 2000 and confirmed the existence of the following critical areas and/or their associated buffers on the property: Shoreline, Suseptible Aquifer Recharge Area, Flood Hazard (Floodplain).
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Title:
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FINDING: Aquifer Recharge Area
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Wording
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Aquifer recharge areas in Jefferson County are characterized by porous geologic formations that allow percolation of the surface water into the soils and the underlying zone of saturation. Aquifers are geologic formations that contain sufficient saturated permeable material to yield significant quantities of water to wells and springs. Aquifers serve as the source of drinking water within most of the rural portions of Jefferson County.
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Title:
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FINDING: Susceptible Aquifer
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Wording
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Susceptible aquifer recharge areas are those with geologic and hydrologic conditions that promote rapid infiltration of recharge waters to groundwater aquifers. This includes any portion of Jefferson County with a DRASTIC index of greater than or equal to 180 points as determined using the U.S. Environmental Protection Agency DRASTIC methodology: Drastic: A Standardized System for Evaluating Ground Water Pollution Using Hydrogeologic Settings (EPA 600/23-87-035).
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Title:
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FINDING: Shoreline setback
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Wording
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The standard setback for residential structures, including common appurtenant structures such as garages and workshops, shall be 30 feet, or 1 foot for each foot of bank height, whichever is greater. This setback shall be measured from the bank's edge when the bank height exceeds 10 feet.
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Title:
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FLOOD CERTIFICATE REQUIRED
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Wording
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A flood area certificate is required for all development in the floodplain. The flood certificate shall be completed by a licensed surveyor and shall include a written and graphic portrayal of the following information: a. the location of the subject property in relation to the flood hazard area; b. the distances of the property and the proposed activity from the edge of the waterway; c. the height of the base flood (in relation to mean sea level) within the vicinity of the proposed activity; d. the height of the subject property (in relation to mean sea level).
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Title:
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FOLLOW FLOOD ORDINANCE
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Wording
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Flood proofing measures are to be used as required by the Jefferson County Flood Damage Prevention Ordinance.
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Title:
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RES CONSTRUCTION FLOOD DAMAGE
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Wording
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All new construction shall use construction methods which minimize flood damage.
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Title:
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RES CONSTRUCTION ELEVATED FLOOR
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Wording
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New construction shall have the lowest floor elevated to at least one foot above base flood elevation.
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Title:
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FLOOD PROOF REQUIREMENT
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Wording
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Fully enclosed area below the lowest floor that are subject to flooding are prohibited unless designed to automatically equalize hydrostatic flood forces on exterior walls by allowing for the entry and exit of floodwater. Designs for meeting this requirement must either be certified by a registered professional engineer or architect or must meet or exceed the following criteria: a. A minimum of two openings having a total net area of not less than one square inch for every square foot of enclosed area subject to flooding shall be provided. b. The bottom of all openings shall be no higher than one foot above grade. c. Openings may be equipt with screens, louvers, or other coverings or devices provided that they permit the automatic entry and exit of floodwater.
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Title:
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MATERIALS AND METHODS
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Wording
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All new construction shall: a. be anchored to prevent flotation, collapse, or lateral movement of the sturcture. b. be constructed with materials and utility equipment resistant to flood damage and potential damage to adjacent properties. c. be constructed using methods and practices that minimize flood damage. d. have structural components capable of resisting hydrostatic and hydrodynamic loads and the effects of buoyancy. e. electrical, heating, ventilation, plumbing, air-conditioning equipment, and other service facilities shall be designed and/or otherwise elevated or located so as to prevent water from entering or accumulating within the components during conditions of flooding.
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Title:
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FLOOD PROOFING
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Wording
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Flood proofing of structures shall be provided by one or more of the following methods: a. Landfill: (Note: Landfills are not permitted in the floodway.) The placement of fill may be utilized to elevate the structure and must comply with the standards and policies of the Jefferson-Port Townsend Shoreline Management Master Program, if applicable. b. Pole, pier or piling construction: The use of poles, piers, or piles for the foundation of the structure may be used to allow the unrestricted flow of flood waters during periods at a base flood. The lowest floor must be one foot above the base flood level. c. Parallel Foundation Walls: Foundation walls may be designed and constructed to provide open spaces through which water can flow unrestricted to equalize pressure. In velocity flood situations, it is important that all foundation walls be parallel to the flow of the floodwaters. d. Extended Foundation Walls and Basements: (Note: Extended foundation walls and basements are not permitted in the floodway.) The lowest habitable floor of a residence may be constructed on foundation walls that extend above grade to one foot above the height of the base flood provided that residential construction complies with the requirment of Section 5.101(2), "Residential Construction," regarding the design of enclosed areas.
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