10-13-08 Drainage and Flooding Committee minutes

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k lot z ~~. ass 0 cia t e s petrochemical facilities. The northeastern portion of the City is considered to be a "Large Lot District," composed primarily of large rural residential lots. The south side of the City is a rural area that is a Planned Unit Development, intermingled with some small, established residential areas. La Porte Municipal Airport is in the center of the City, north of Spencer Highway. 2.1.2 Drainage Overview The City is drained by both storm sewers and open and roadside ditches. Storm sewered areas are commonly found in the newer developments in the west side of the City and in the Brookglen subdivision. The topography of the City is generally flat and averages about 24 feet above sea level (see Exhibit 2-3). Drainage problems have been reported or identified in many areas of the City, but many of the drainage problem or flood prone areas are concentrated in the older areas of the City. More recently developed areas of the City typically have less reported or identified drainage problems. Tidal variations in the lower San Jacinto Bayou and Galveston Bay can significantly affect drainage in the eastern side of the City. The city has approximately 35.1 miles of Harris County Flood Control (HCFCD) drainage channels; these named channels fonn the primary component of the surface drainage system in La Porte. The City also has approximately 3 miles of coast contiguous to Galveston Bay. There are seven major channels forming the primary surface drainage system of the City (see Exhibit 2-4). There are also nine major tributaries to these primary channels. Drainage conditions in and along these primary and major tributaries are the focus of the CWDS. 2-2 Klotz Associates Project No. 0127.008.000 January 2009 La Porte Citywide Drainage Study City of La Porte