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k I o t z C i' I associates <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 />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-1). 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 upsizing is identified when review of <br />storm sewer system data indicated that the existing outfall was undersized. <br />The following table summarizes the proposed relief swale projects: <br />EMU= <br />. ..... — - ---- - - ------- -- <br />Project Subdivision/ Area Type of Improvement Project COST/BENEFIT: <br />ID Benefiting Construction 'Construction Cost <br />Cost Per Loss <br />Removed' <br />I Pinegrove Valley Relief Swale $6,000 $140 <br />2 jBrookglen Relief Swales & Outfall Pipe Upgrade $95,000 $350 <br />3 Fairmont Park West Swales & Outfall Pipe Upgrade $57,000 $370 <br />— - ------- -- - ----------------------- . .... . -6 .. . ....................... . . <br />4 IGIen Meadow West <br />Swales & Outfall Pipe Upgrade $30,000 <br />f. ... ... .. ....... —_ <br />5 jMeadow Park Relief Swales & Outfall Pipe Upgrade $13,000 $540 <br />. . . ............. <br />6 'Fairmont Park lRelief Swales & Outfall Pipe Upgrade $19,000 $560 <br />rsrsne <br />7 Creckmont Section 1 Relief Swale & Outfall Pipe Upgrade $34,000 $610 <br />- ------------------ ------ <br />8 'Fairmont Park East lRelief Swales & Outfall Pipe Upgrade $65,000 <br />9 Spencer Highway Relief Swale $3 0,000 <br />— ------- ------- — — - ----- <br />10 Villa Del Rancho lRelief Swale $24,000 $2,670 <br />11 Battleground Estates ]Relief Swale $35,000 $17,50 0 <br />- - -------- <br />0 $21,000 <br />12 Old LaPorte Relief Swale & Outfall Pipe Upgrade $336,00 <br />-------------------- <br />Total 12 Projects $744,000 <br />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 />Z11 <br />EN - - 5 <br />Klotz Associates Project No. 0127.008.000 La Porte Citywide Drainage Study <br />January 2009 City of La. Porte <br />