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<br />purpose of this interconnect was to divert some of the flow from Willow Springs Bayou to <br />Spring Gully, and according to a study by Wilbur Smith Engineers 3 , the Brookglen subdivision is <br />one of the two subdivisions to benefit from the new channel. <br /> <br />La Porte Analysis Area <br />I <br /> <br /> <br />I <br />~ <br />i_ <br />J'-.- <br />i <br />i <br />, <br /> <br />~ <br />I <br />1 <br />\ <br />~- PE"CEll.,",vi; <br />I <br /> <br />L <br />-\ <br /> <br /> <br />,) <br />j'~ <br />/ '(2:;.f~, , <br />", .....E <br />.E_ '\~ <br /> <br /> <br />S (iI. w ~ <br /> <br />C. <br />~::c" <br />;g. / <br /> <br />Interconnect 10 8109-00-00 <br />(New Direction of Flow) <br /> <br />1~1f1T'~' <br /> <br />Legend <br /> <br /> <br />= Major Highways <br />- TSARP Channels <br />- PoAajor Roads ~ <br />~~ Wetlands -~ <br />L ] La Porle City Umtts, <br />,. --' --..,.) <br /> <br />,~ I <br />,,;?j <br /> <br />D <br />, <br />t <br /> <br />Figure 2-6: Analysis Area Drainage <br /> <br />Several detention ponds have been constructed, including one major detention pond located on a <br />large site north of Spencer Highway. This detention basin was constructed so that the increased <br />flow in Spring Gully would not negatively impact downstream drainage. Per a citywide study <br />conducted by Klotz Engineers4, this area still experiences flooding as a result of: <br />1) The lack of overland sheet flow paths <br />2) Undersized channels and bridge crossings <br />3) Buildings and structures that prevent the natural flow pattern <br /> <br />Table 2-1 shows that the drainage improvements to date appear to have reduced flooding from <br />smaller storms. However, the drainage system was overwhelmed by Tropical Storm Allison in <br />2001 and Tropical storm Erin in 2007. <br /> <br />3 Hydrologic and Hydraulic Study for Interconnect of B 112-02 to B 1 09-00 (Wilbur Smith Engineers for Harris <br />County, April 1997) <br />4 La Porte City-Wide Drainage study: Reports #1 and #2 (Klotz Engineers for City of La Porte, Tx, 2008) <br /> <br />Brookglen Area Analysis - DRAFT <br /> <br />11 <br /> <br />9/8/2008 <br />