2-13-23 - Laserfiche WebLink

Browse Search

January 6, 2023 Andrew Moore, P.E. Halff Associates, Inc. Page 2 Project Summary The City of Pasadena is proposing to develop a detention pond in order to satisfy an interlocal agreement between the City of Pasadena and the City of La Porte. The agreement between the cities involved the City of La Porte receiving a 99-acre tract from the City of Pasadena in exchange for a 73-acre tract. The City of Pasadena proposed drainage improvements within the 99-acre tract as a part of a planned redevelopment of the Pasadena Convention Center and Fairgrounds site, including the construction of a detention pond with a minimum of 100-acre feet of volume, as well as relocation of several driveways. capacity provisions. The tract is mostly undeveloped and consists of grassy terrain. The proposed project, consisting of a single pond located along the southern portion of the tract, overlaps approximately 6.9 acres of potentially jurisdictional forested wetlands. The goal of the hydrologic and hydraulic analysis was to show no adverse impact on the existing floodplain as a result of the proposed detention pond. Detention Summary The following table identifies the detention summary provided within the report: Floodplain Related Information According to FEMA FIRM Panel No. 48201C0940M, effective June 9, 2014, majority of the 100- year floodplain (Zone AE) to be contained within the channel except for small portions that extend over the west and east overbanks near the downstream side of the project area. The 500-year floodplain (Shaded Zone X) covers approximately half of the project area and generally coincides with the potentially jurisdictional wetlands submitted under an AJD to the USACE for evaluation. Work in the effective FEMA floodway is not proposed in this project. Please also note that the City of Pasadena is the Floodplain Administrator for the receiving waterways. All issues regarding local floodplain regulations must be coordinated through the City of Pasadena.