12-14-20 Drainage and Flooding Committee Meeting

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PROPOSED DRAINAGE IMPROVEMENTS • As part of a planned redevelopment of the Pasadena Convention Center and Fairgrounds site south of W. Fairmont Parkway and on either side of Willow Springs Bayou (Harris County Flood Control Channel B112-00-00), it is the intention of the City of Pasadena to make drainage improvements benefitting all those who depend upon this channel for effective flood control. • Improvements will include provision for at least 100 acre-feet of storm water detention as required to reduce peak event runoff volumes from impervious areas served by the channel. • The Brookglen Subdivision in the City of LaPorte, located immediately upstream of the Pasadena Convention Center and Fairgrounds site, consists of approximately 600 single- family homes. The area has experienced severe flooding, with a number of homes suffering repetitive losses. In its 2009 City Wide Drainage Study (available on the City's web site), the City of LaPorte identified several capital projects directly benefitting the drainage area immediately north of the Pasadena Convention Center and Fairgrounds site. • Based on these substantial potential capital project costs and other engineering studies we believe that reductions in the range of % foot to one foot of the water surface elevation through downstream improvements constructed by the City of Pasadena would have significant financial benefit to the City of LaPorte, both in terms of reduced exposure to flood losses and opportunity to avoid certain capital expenditures. • Pasadena will provide La Porte the necessary modeling information performed by Klotz Associates, Inc. for future LOMR submittal to FEMA.