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<br />k lot z 4~. ass 0 cia t e s <br /> <br />drainage in areas where significant amounts of flooding problems have been reported and <br />evaluation indicates lack of overland drainage for sheet flow discharge. <br /> <br />Some proposed relief swales are proposed to be located in a storm sewer system outfall <br />easement; in these cases, the outfall pipe will require replacement in addition to construction of <br />the swale (e.g., see Project 2 in Table ES-I). Storm sewer system capabilities can also be <br />improved by increasing the outfall pipe size and thereby reducing the "chocking" effect it has on <br />upstream storm sewers during extreme event storms. Such up sizing is identified when review of <br />storm sewer system data indicated that the existing outfall was undersized. <br /> <br />The following table summarizes the proposed relief swale projects:. . <br /> <br />Recommended Relief Swale Projects <br /> <br />Project Subdivision/ Area Type of Improvement Project COST/BENEFlT: <br />ill Benefiting Construction Construction Cost <br /> Cost Per Loss <br /> Removed! <br />1 Pinegrove Valley Relief Swale $6,000 $140 <br />2 Brookglen Relief Swales & Outfall Pipe Upgrade $95,000 $350 <br />3 Fairmont Park West Relief Swales & Outfall Pipe Upgrade $57,000 $370 <br />4 Glen Meadow Relief Swales & Outfall Pipe Upgrade $30,000 $540 <br />5 Meadow Park Relief Swales & Outfall Pipe Upgrade $13,000 $540 <br />6 Fairmont Park Relief Swales & Outfall Pipe Upgrade $19,000 $560 <br />7 Creekmont Section 1 Relief Swale & Outfall Pipe Upgrade $34,000 $610 <br />8 Fairmont Park East Relief Swales & Outfall Pipe Upgrade $65,000 $860 <br />9 Spencer Highway Relief Swale $30,000 $1,360 <br />10 Villa Del Rancho Relief Swale $24,000 $2,670 <br />11 Battleground Estates Relief Swa1e $35,000 $17,500 <br />12 Old La Porte Relief Swale & Outfall Pipe Upgrade $336,000 $21,000 <br /> Total 12 Projects $744,000 <br /> <br />1 Total construction cost divided by the number of structures that have been reported in the past to have flooded and <br />for which the recommended project will alleviate flooding in the future. <br /> <br />EN-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 />