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<br />k lot z 4~~ ass 0 cia t e s <br /> <br />Storm Sewer Improvements <br /> <br />Areas where sewer system improvements are needed are listed in Table ES-2. Reasons for the <br />needed sewer system improvements can be several, including insufficient pipe size, insufficient <br />street inlet capacity, or high tailwater levels in the receiving channel. High tailwaters are <br />fundamentally a problem in the receiving channel capacity, while insufficient capacity of storm <br />sewer pipes and inlets is a true storm sewer deficiency. An identification of the likely source of <br />the storm sewer system problem, either insufficient receiving channel capacity or insufficient <br />storm sewer system capacity, is given. In some cases the flooding was judged to a combination <br />of both causes. <br /> <br />Subdivisions where storm sewer system improvements are needed and/or more detailed <br />investigation is needed to determine the extent of needed sewer improvements have been <br />identified and are listed in Table ES-2 in order of estimated drainage problem severity. Of these <br />subdivisions, Brookglen, Creekmont Section 1, Glen Meadows, Fairmont Park East, Pinegrove <br />Valley, and Spencer Highway Estates have high drainage problem severities; and thus should be <br />given high priority for problem solution. The Creekmont Section 2 Project is expected to <br />constructed in the near future. Some proposed improvements have been already identified for <br />Brookglen, Creekmont Section 1, Glen Meadows, Fairmont Park East; these improvements <br />include relief swales as part of the project but will require further engineering investigation for <br />defining full project details. <br /> <br />Channel Improvements and Ponds for Diversion of Flood Waters <br /> <br />Channel improvements or detention ponds to which some channel flood flow can be temporarily <br />diverted (i.e., "diversion ponds") are recommended where the out-of-bank flow or high in- <br />channel water levels. The latter condition may be a primary source of flooding when low lying <br />areas at less than top-of-channel bank elevations occur beyond the channel banks and channel <br />flood waters can move from the channel (through low points along the bank or by sewer backup) <br /> <br />EN-6 <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 />