Ord 2016-050/revisions to the San Marcos City Code of Ordinance Chapter 39: Flood Damage Prevention Ordinance

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buildings with a majority of floor area dedicated to residential uses. For details refer to FEMA Technical Bulletin 2- 93. (9) Encroachments. Encroachments, including fill, new construction, substantial improvements and other developments within the floodplain are prohibited unless it has been demonstrated through hydrologic and hydraulic analyses performed in accordance with standard engineering _practice that the proposed encroachment would not result in any increase in flood levels within the community during the occurrence of the base flood discharge. An increase in the water surface elevation of a floodplain may be permitted only when all of the following conditions are met: a) The property owner owns both sides of the floodplain to the extent of the increase in water surface elevation and b) The increase in the regulatory floodplain is contained in a dedicated drainage easement or right -of -way, and c) The increase in water surface elevation for the 1% annual chance flood does not exceed six inches. (10) Increase in Dischai:ge. The increase in discharge due to the loss of storage shall be accounted for in all reclamation analyses. Sec. 39.044. Additional provisions for manufactured homes and recreational vehicles. (1) All manufactured homes to be placed within zone A shall be installed using methods and practices which minimize flood damage. For the purpose of this requirement, manufactured homes must be elevated and anchored to resist flotation, collapse or lateral movement. Methods of anchoring may include but are not limited to use of over - the -top or frame ties to ground anchors. This requirement is in addition to other applicable anchoring requirements for resisting wind forces. (2) All manufactured homes shall be in compliance with section 39.041. (3) Manufactured homes that are placed or substantially improved within zones AH and AE on the community's FIRM on sites (i) outside of a manufactured home park or subdivision, (ii) in a new manufactured home park or subdivision, (iii) in an expansion to an existing manufactured home park or subdivision, or (iv) in an existing manufactured home park or subdivision where a manufactured home has incurred substantial damage as the result of a flood, shall be elevated on a permanent foundation so that the lowest floor of the manufactured home is at or above two one foot above the base flood elevation and that the home shall be securely anchored to an adequately anchored foundation system in accordance with section 39.041.