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<br /> <br />Federal Emergency Management Agency <br />Washington, D.C. 20472 <br />JUl.. I 3 1999 <br /> <br />-"-. <br /> <br />FROM: <br /> <br />'t-\~~'''~~or- <br /> <br />Michael Buckley, Director <br />Technical Services Division <br /> <br />Ii: <br />, S~\. <br />%~srs'\~~~J <br /> <br />'n,r.o..""" <br /> <br />MEMORANDUM FOR: Regional and Headquarters Engineers <br />Technical Evaluation Contractors <br /> <br />SUBJECT: <br /> <br />Policy for Accepting Numerical Models for Use in the NFIP <br /> <br />With a memo dated April 12, 1999, we released an updated verSIOn of the list entitled <br />"Numerical Models Accepted for Use in the NFIP." This is a list that the Technical Services <br />Division maintains as a means of ensuring consistency in implementing CFR 65.6(a)(6), which <br />are -the regulations that explain conditions by which a computer model can be used . for flood <br />hazard mapping in the National Flood Insurance Program. The purpose of this memorandum is <br />to clarify the procedures to follow for accepting numerical models,for flood hazard mapping and <br />adding them to the list. <br /> <br />As you are aware, we can not accept flood insurance studies that are performed with numerical <br />models other than those on the accepted models list. For your convenience, the list is posted on <br />the Flood Hazard Mapping page of our web site at www.fema.gov/mit/tsd. It can be found under <br />"Forms, Documents, and Software" in the "Engineers and Surveyors" section, or directly at <br />http://www.fema.gov/mitltsd/ENmodl.htm. Please visit the web site for the most up-to-date <br />version of the list, as it will be updated as necessary. <br /> <br />APPLICABLE NFIP REGULATIONS <br /> <br />As Paragraph 65.6(a)(6) of the NFIP regulations states, any computer program used to perform <br />hydrologic and hydraulic analyses jn support of a flood insurance map revision must meet all of <br />the following criteria: <br />1. The model must be reviewed, tested, and accepted by a government agency responsible <br />for the implementation of programs for flood control and/or regulation of floodplains. <br /> <br />2. The model must be well-documented, including source codes and user's manuals. <br /> <br />3. The model must be available to the Federal Emergency Management Agency (FEMA) <br />and all present and future parties impacted by flood insurance mapping that is <br />developed or amended through the use of the model. <br /> <br /> <br />I <br />