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<br />1. Only data for the 26 repetitive flood loss properties were reviewed. There could be other <br />properties that have been repetitively flooded, but did not submit claims. Additional, <br />non-repetitive, flood insurance claims data were not available for the study area. <br />2. NFIP records do not include claims data from before 1978, so there could have been <br />additional losses not included. <br />3. Policy holders may not have submitted claims for smaller floods for fear of it affecting <br />their coverage or their premium rates. <br />4. The losses only account for items covered by the insurance policy. Things not covered <br />include living expenses during evacuation, swimming pools, and automobiles. <br /> <br />Also noteworthy is the Privacy Act of 1974 (5 V.S.C. 522a) that restricts the release of certain <br />types of data to the public. Rood insurance policy and claims data are included in the list of <br />restricted information. FEMA can only release such data to state and local governments, and <br />only if the data are used for floodplain management, mitigation, or research purposes. Therefore, <br />this report does not identify the repetitive flood loss properties or include claims data for any <br />individual property. Rather, it discusses them only in summary form. <br /> <br />ID. Drainage Information <br /> <br />Stormwater falling on the Brookglen subdivision runs from the yards to the streets where it is <br />collected by storm sewers. The stonn sewers flow either north to West Plantation Ditch (coded <br />B112-02-00 by the Harris County Rood Control District) or west to Willow Springs Bayou <br />(B112-00-00.) Figure 2-1 (on page 7) illustrates the location of these two drainage channels. <br /> <br />West Plantation Ditch (see Figure 2-2) is a concrete lined drainage channel. Willow Springs <br />Bayou (see Figures 2-3 through 2-5) has concrete lined sections, but is grass lined in most areas. <br />Both of these drainage channels are maintained by the Harris County Flood Control District. <br /> <br />A. Flooding Problem: There are three potential sources of the flooding problems in the <br />Brookglen subdivision. <br />1) The most severe flooding threat to the area is storm surge. The area has not seen this <br />type of flooding event to date, therefore, the repetitive flood problem in Brookglen is not <br />due to storm surge. <br />2) The stonn sewers are undersized to handle a heavy rain event. As of the date of this <br />report, the City of La Porte designs stonn sewers to handle flow from a three year rain <br />event. The rainfall from Tropical Stonn Allison, for example, exceeded 500-year storm <br />rainfall amounts. Therefore, given the flooding history in Brookglen, it can be assumed <br />that stonn sewers designed for the 3- year event are not adequate for the heavy rains that <br />flood the neighborhood. <br />3) The two drainage ditches, West Plantation and Willow Springs Bayou, drain slowly and <br />push water into the neighborhood streets, yards and houses during heavy rains. According <br />to the Comprehensive Plan, water backs up 0.8 feet above the 100-year flood level where <br />Willow Springs Bayou flows under Fairmont Parkway. Homeowners also report that this <br />location is a constriction. However, a review of the current Flood Insurance Study profile <br />for Willow Springs Bayou indicates that there is no constriction at Fairrnont Parkway. <br />The Flood Insurance Study Profile that was in effect when the Comprehensive Plan was <br /> <br />Brookglen Area Analysis - DRAFT <br /> <br />9 <br /> <br />9/8/2008 <br />