10-13-08 Drainage and Flooding Committee minutes

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k lot z ~~~ ass 0 cia t e s projects that should be delayed for consideration to some future time when more funds become available or the need for a project can be more adequately justified. Cost of a project is one consideration in establishing priorities for projects; if two projects accomplish essentially the same result, then the lesser cost project would normally be the preferred project for implementation. However, it is seldom that two projects have sufficiently similar results that would allow such a clear choice to be made. Alternatives are needed to assist in defining project priorities. The previous discussions in Section 2 looked at drainage improvement needs for various subdivision areas from two perspectives, as summarized in Table 2-4: 1) the estimated flooding severity (as estimated from flooding reports), re-expressed in tenns of flooding problem severity rank (10 being highest level of severity and 1 being the lowest level); and 2) estimated beneficial impact, as estimated by the number of properties judged to be beneficially impacted by proposed drainage improvements. On the other hand, it is recognized that particular projects which have been proposed are intended to eliminate significant flooding in particular areas; these areas where flooding will be largely eliminated may and generally do cut across portion of different subdivisions. Exhibits 4-4, 4-5, and 4-6 show, for each of the channel improvement or diversion project needed in order to address current drainage and flooding problems, those subdivisions that will, all or in part, be beneficially impacted by a particular project. If prioritization interest were to be focused upon addressing problems in a particular subdivision, these exhibits along with Table 2-4 can be used to identify those projects which should be given a higher level of importance in project prioritization. A more quantitative basis for establishing a potential prioritization of projects is to count the number of residents (as reflected in the total number of flooding reports) for which flooding would be generally eliminated. These flooding report numbers are listed in 5-3 Klotz Associates Project No. 0127.008.000 January 2009 La Porte Citywide Drainage Study City ofLa Porte