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<br />k lot z ~~. ass 0 cia t e s <br /> <br />meandering channels with either heavy forested overbanks or dense <br />residential/commercials areas. <br /> <br />This area has experienced structural flooding. The San Jacinto/Galveston Bay Watershed <br />has been partially studied by FEMA as part of the Tropical Storm Allison Recovery <br />Program (TSARP). However, Little Cedar Bayou (F216-00-00), the most significant <br />channel in the watershed within the City (see Exhibit 2-8), was the only channel in the <br />watershed that was specifically studied in this program. The City has plans to construct a <br />linear detention pond on F216-00-00 to reduce flooding in the area. Exhibit 2-8 shows <br />stream locations, FEMA delineated floodplains, and locations of flooded structures. <br /> <br />2.3 Drainage and Flooding Problems <br /> <br />2.3.1 Base Flood Maps and Regulatory Floodplains <br /> <br />The City's current Base (IOO-year) Flood Maps (also identified as FIRMs, i.e., flood <br />insurance rate maps) were developed as a consequence of hydrologic and hydraulic <br />studies done for the FEMA-sponsored Tropical Storm Allison Recovery Program <br />(TSARP); these maps became effective on June 18, 2007. These Base Maps were <br />developed using particular hydrologic and hydraulic models (conveniently referred to <br />here as the FEMA models since they have been fonnally adopted by FEMA) to delineate <br />the extent of potential floodplains along various larger streams, bayous, and channels in a <br />watershed for base flood conditions in the area drained by the watercourse in question; <br />these floodplains define regulatory floodplains (i.e., officially recognized by FEMA and <br />used for defining flood insurance rates). Exhibit 2-6, 2-7, and 2-8 shows the locations of <br />the floodplains delineated on the FEMA base maps for bayous and streams studied under <br />the TSARP program that lie in the City. The delineated floodplains identify areas where <br />potentials for flooding are high during severe storm events. <br /> <br />2-5 <br /> <br />Klotz Associates Project No. 0127.008.000 <br />January 2009 <br /> <br />La Porte Citywide Drainage Study <br />City of La Porte <br />