Drainage and Flooding Report January 2009

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I o t associates If, however, Project 26 is removed from consideration, Projects 25 and 24 can also be removed from consideration because they have more efficient options. Consequently, the largest cost/benefit drops to only $87,500 (for Project 23) and the largest project cost drops to $8.3 million (also for Project 23). The projects removed from consideration reduce the channels for which projects remain from 10 to 8. Additional removals require more comprehensive considerations that would involve City policy and funding considerations. Project Subdivision/ Area Benefiting Type of Project Construction ID { Improvement Construction Cost Per Loss Removed' Cost Rved' su �.m 13 ( Fairmont Park Fairmont Park East Channel Widening $781,000 ( $23,000 14 Brookglen Channel Lining $5 494 D00 g g $29,400 11111_ 15 Meadow Park, Villa Del Rancho Channel Widening $1,701,000 $47,000 16 Lennox Gardens, L Sheet Pond for Diversion $1,092,000 $50,000 l8 Battleground Estates, Pinegrove Valley; P Channel Lining $1,032,000 $54,000 Street ...� r ,wnm 19 Shady River Channel Widening, $361 000 $6fl 200 1 __--- 21 Woods on the Bay, Pine Bluff, Shady Channel Widening $600,000 $75,000 I River mm.2� �.v_e Meadow Crest, Creekmont, Glen Pond for Diversion $8,314,000 $87,500 - I Meadows, Fairmont Park, Fairmont Park West I Total 8 Projects 1 $19,375,000 Total Construction cost divided by the number of structures that have been reported in the past to have flooded and for which recommended projects will alleviate flooding in the future. Thus, in view of project cost/benefits and total projects costs, $87,500 per loss removed appears to be a reasonable breakpoint for deciding whether channel improvements or diversion ponds are 1 Klotz Associates Project No_ 0127.008.000 La Porte Citywide Drainage Study January 2009 City of La Porte