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<br />. In some instances, additional data may be required for FEMA to
<br />make a determination, These may consist of, but not be limited to,
<br />certifications by a registered professional engineer or a licensed
<br />land surveyor as to the type of structure and whether it is elevated
<br />on pots, piers, pilings, or barrier sand dunes; or a hydraulic
<br />analysis of the flooding conditions,
<br />. To support a request involving fill that was placed before the
<br />effective date of the first NFIP map showing the structure or par-
<br />cel of land to be within the SFHA, a requestor may be required to
<br />submit a certification of the date the fill was placed, This certifica-
<br />tion may be made by a community official, registered professional
<br />engineer, or licensed land surveyor.
<br />. When the effective NFIP map is on FH8M, 8FE's wiil not be
<br />shown, The requestor may either determine on approximate 8FE.
<br />FEMA will either check the 8FE determined by the requestor or, if
<br />necessary, determine an approximate 8FE using the supporting
<br />data for the FH 8M or the best avaiiable data,
<br />When a preliminary or revised preliminary FIRM has been issued,
<br />the 8FE's shown on the FIRM may be used as best avaiiable data
<br />after the 8FE's have been made final by FEMA.
<br />. When the effective NFIP map is a FIRM, the determination con,
<br />cerning the structure or parcel of land will be made using the
<br />8FE's shown on the FIRM. Determinations cannot be made using
<br />other flood elevations, unless the effective FIRM Is first revised to
<br />incorporate the new elevations,
<br />. When the effective FIRM shows an average depth of flooding
<br />rather than a 8FE, the determination wiil be made by comparing
<br />the elevations of the lowest grade adjacent to the structure to the
<br />elevation of the surrounding terrain where sheet flow would be
<br />conveyed, If the difference in these elevations is equal to or
<br />greater than the flood depth shown on the effective FIRM, the
<br />structure can be excluded from the SFHA.
<br />. When the SFHA on the effective FI RM is designated as approx-
<br />imate Zone A no 8FE's wiil be shown, If the structure is located in
<br />approximate Zone A, a 8FE may be determined by the same
<br />method as that used when the effective map in an FH8M,
<br />. Structures that have been elevated above the 8FE on posts, piers,
<br />or pilings cannot be excluded from the SFHA if any portion of the
<br />structure (including the posts, piers, or pilings) is stiil in the SFHA.
<br />. Regardless of the elevations of the lowest adjacent grades and
<br />lowest floor, LOMA's wiil not be issued to exclude from the SFHA
<br />structures located in floodways or in Zone V or in areas that are
<br />anticipated to be designated as floodways or Zone 8,
<br />No determinations can be made until the floodway has been revised
<br />to exclude the structure or until the Zone V designation for the area in
<br />which the structure is located has been changed, Changes to floodways
<br />are discussed in the following section titled "flood way revisions",
<br />Changes to zone designations shown on effective maps are made under
<br />the Map Revision process,
<br />
<br />E. Map Amendment Procedures
<br />After a request has been received, FEMA wiil aCknowledge receipt of
<br />the requestor, This letter will be accompanied by a checklist that Iden,
<br />tifies any basic data the requestor may have neglected to submit. If suf-
<br />ficient data have been provided with the request, FEMA wiil review the
<br />request and the supporting data, If any questions or problems arise dur,
<br />ing this review, FEMA will work with the requestor to resolve them,
<br />
<br />If the missing data identified on the checklist are not provided within
<br />30 days of the date of the acknowledgment letter, a data request letter
<br />wiil be sent to the requestor, This letter will ail ow the requestor 30
<br />more days to provide the necessary data, If these data are not provided
<br />within the allowed time, FEMA will generally drop the request. If the
<br />requested data are provided, FEMA will complete the review and issue
<br />the appropriate LaMA, Generally the LaMA will be issued within 4 to 8
<br />weeks of the date that all the required supporting data are received,
<br />When FEMA determines that, based on the legal description or
<br />recorded plat, the structure is located outside the SFHA shown on the
<br />effective NFIP map, a LaMA will be issued stating that the structure is
<br />"out as shown",
<br />
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