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HomeMy WebLinkAbout2616ORDINANCE NO. 2616 AN ORDINANCE of the City of Port Angeles amending regulations for flood plain management, and amending Ordinances 2091, 2445, 2514 and 2524, and Chapter 15.12 of the Port Angeles Municipal Code. WHEREAS, the City's Flood Management Prevention Ordinance should be amended to delete certain conditions that are no longer required and to adopt the revised Flood Insurance Maps dated September, 1990; NOW, THEREFORE, BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF PORT ANGELES, as follows: Section 1. Section 4 of Ordinance 2091, as amended by Section 3 of Ordinance 2445 and by Section 3 of Ordinance 2514, and Section 15.12.030 of the Port Angeles Municipal Code are each amended to read as follows: 15.12.030 General Provisions. A. Lands to which this Chapter applies: This Chapter shall apply to all areas of special flood hazards within the jurisdiction of the City of Port Angeles. B. Basis for establishing the areas of special flood hazard: The areas of special flood hazard identified by the Federal Insurance Administration in a scientific and engineering report entitled Flood Insurance Study for the City of Port Angeles, dated February, 1980, and revised September 28, 1990 with accompanying Flood Insurance Maps is hereby adopted by reference and declared to be a part of this Chapter. The Flood Insurance Study is on file at the office of the City Clerk, 321 East Fifth Street, Port Angeles, Washington 98362. Section 2. Section 2 of Ordinance 2514 and Section 15.12.105 of the Port Angeles Municipal Code are each repealed. 15.12.105 Critical Facility. "Critical Facility" means a -1- ochool3, nur3ing homc3, ho3pitals, police, firc and emergcncy store hazardou3 matcrial3 or hazardou3 wa3tc. Section 3. Section 12 of Ordinance 2091, Section 7 of Ordinance 2445, Section 7 of Ordinance 2514, Section 2 of Ordinance 2524, and Section 15.12.270 of the Port Angeles Municipal Code are each amended to read as follows: 15.12.270 Specific Standards. In all areas of special flood hazards where base flood elevation data has been provided as set forth in Section 15.12.030 General Provisions, or PAMC 15.12.220(B), the following provisions are required: A. Residential Construction. 1. New construction and substantial improvement of any residential structure shall have the lowest floor, including basement, elevated to o --foot or morc abovc the base flood elevation. 2. Fully enclosed areas below the lowest floor that are subject to flooding are prohibited, or shall be designed to automatically equalize hydrostatic flood forces on exterior walls by allowing for the entry and exit of floodwaters. Designs for meeting this requirement must either be certified by a registered professional engineer or architect or must meet or exceed the following minimum 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 equipped with screens, louvers, or other coverings or devices, provided that they permit the automatic entry and exit of floodwaters. B. Non - Residential Construction. New construction and substantial improvement of any commercial, industrial or other -2- non - residential structure shall either have the lowest floor, including basement, elevated to one - =feete -mere above the level of the base flood elevation; or, together with attendant utility and sanitary facilities, shall: 1. be floodproofed so that below one foot above -the base flood level the structure is watertight with walls substantially impermeable to the passage of water; 2. have structural components capable of resisting hydrostatic and hydrodynamic loads and effects of buoyancy; 3. be certified by a registered professional engineer or architect that the design and methods of construction are in accordance with accepted standards of practice for meeting provisions of this subsection, based on their development and /or review of the structural design, specifications and plans. Such certifications shall be provided to the official as set forth in PAMC 15.12.220(C). 4. Non - residential structures that are elevated, not floodproofed, must meet the same standards for space below the lowest floor as described in Sub - Section (A). 5. Applicants floodproofing non - residential buildings shall be notified that flood insurance premiums will be based on rates that are at base flood level one foot below the floodproofcd lcvcl (c.g., a building floodproofcd to one foot level). C. Critical facility. Construction of ncw critical facilities shall be, to thc extent po33ible, located out3idc the limits of thc base flood plain. Construction of ncw critical -3- must be taken to ensure that toxic substances will not be displaced by or released into flood waters. Access ee of the base flood plain shall be D. Manufactured Homes. All manufactured homes to be placed or substantially improved within Zones A1-30, AH, and AE on the City's FIRM shall be elevated on a permanent foundation such that the lowest floor of the manufactured home is at or ere foot or more above the base flood elevation and be securely anchored to an adequately anchored foundation system in accordance with the provisions of PAMC 15.12.260(A). This paragraph applies to manufactured homes to be placed or substan- tially improved in an expansion to an existing manufactured home park or subdivision. This paragraph does not apply to manufactured homes to be placed or substantially improved in an existing manufactured home park or subdivision except where the repair, reconstruction, or improvement of the streets, utilities and pads equals or exceeds 50 percent of the value of the streets, utilities and pads before the repair, reconstruction or improvement has commenced. Section 4. Section 14 of Ordinance 2091, Section 9 of Ordinance 2445, Section 10 of Ordinance 2514, and Section 15.12.340 of the Port Angeles Municipal Code are each amended to read as follows: 15.12.340 Coastal High Hazard Area. Located within areas of special flood hazard established in PAMC 15.12.030 are Coastal High Hazard Areas, designated as Zones V1 -V30, VE and /or V. These areas have special flood hazards associated with high velocity waters from tidal surges and, therefore, in addition to meeting all provisions in this Chapter, the following provisions shall also apply: A. Due to the dynamic nature of coastal high hazard areas located along the Pacific Ocean, in areas with designated -4- Velocity Zones (V- zones) from Cape Disappointment to Cape Flattery, the following standards shall apply: 1. Prohibit new or substantially improved construction in designated V- zones; exceptions are for needed water dependent structures or structures that facilitate public recreational access to the shore. Structures which require siting in the V -zone should be sited landward of the primary dune if an active dune system is associated with the V -zone. 2. Prohibit any alteration of dunes in the above designated V -zones which could increase potential flood damage; this restriction includes prohibiting any modification or alteration or disturbance of vegetative cover associated with dunes located in designated V- zones. B. All new construction and substantial improvements in Zones V1 -V30 and VE (V if base flood elevation data is available) shall be elevated on pilings and columns so that: 1. the bottom of the lowest horizontal structural member of the lowest floor (excluding the pilings or columns) is elevated to or etc foot or morc above the base flood level; and 2. the pile or column foundation and structure attached thereto is anchored to resist flotation, collapse and lateral movement due to the effects of wind and water loads acting simultaneously on all building components. Wind and water loading values shall each have a one percent chance of being equaled or exceeded in any given year (100 -year mean recurrence interval). A registered professional engineer or architect shall develop or review the structural design, specifications and plans for the construction and shall certify that the design and methods of construction to be used are in accordance with accepted standards of practice for meeting the provisions of (1) and (2) of this Section. C. Obtain the elevation (in relation to mean sea level) of the bottom of the lowest structural member of the lowest floor (excluding pilings and columns) of all new and substantially improved structures in Zones V1 -30 and VE, and whether or not such structures contain a basement. The local administrator shall maintain a record of all such information. D. All new construction shall be located landward of the reach of mean high tide. E. Provide that all new construction and substantial improvements have the space below the lowest floor either free of obstruction or constructed with non - supporting breakaway walls, open wood latticework, or insect screening intended to collapse under wind and water loads without causing collapse, displacement or other structural damage to the elevated portion of the building or supporting foundation system. For the purpose of this Section, a breakaway wall shall have a design safe loading resistance of not less than 10 and no more than 20 pounds per square foot. Use of breakaway walls which exceed a design safe loading resistance of 20 pounds per square foot (either by design or when so required by local or State codes) may be permitted only if a registered professional engineer or architect certifies that the designs proposed meet the following conditions: 1. breakaway wall collapse shall result from a water load less than that which would occur during the base flood; and 2. the elevated portion of the building and supporting foundation system shall not be subject to collapse, displacement, or other structural damage due to the effects of wind and water loads acting simultaneously on all building components (structural and non - structural). Maximum wind and water loading values to be used in this determination shall each have a one percent chance of being equaled or exceeded in any given year (100 -year mean recurrence interval). -6- F. If breakaway walls are utilized, such enclosed space shall be usable solely for parking of vehicles, building access, or storage. Such space shall not be used for human habitation. G. Prohibit the use of fill for structural support of buildings. Section 5 Severability. If any provisions of this Ordinance, or its application to any person or circumstance, is held invalid, the remainder of the Ordinance, or application of the provisions of the Ordinance to other persons or circumstances, is not affected. Section 6 Effective Date. This Ordinance shall take effect five (5) days after its publication. PASSED by the City Council of the City of Port Angeles at a regular meeting of said Council held on the 16th day of October, 1990. ATTEST: Becky J. APPROV 1(5E- it Cler AS TO FORM: Craig D. gnu son, City Attorney PUBLISHED: 10/21/90 PW.315 C MAYOR