EXH0269019499

MPU improvements that would likely require stormwater management are summarized in Table A-3 (Appendix A). Also included in Table A-3 a:e the names of potential stox'mwaterdetention facilities that could serve the new MPU improvements. These facilities are described in more detail in Section 6.1.3. The primary MPU improvements are shown in Figure 5-1. This figure shows the general extent of the major projects and proposed new impervious surfaces. Minor MPU improvements are not shown on this figure; these are primarily located in the terminal and air cargo redevelopment areas and generally do not create new tmpervious sm'face area draining to the SDS. Also, the SMP addresses cnly permanent projects? 5 These and other projects that may be developed to support needed infi-astructure improvements will be evaluated for stormwater impacts based on criteria established herein to eusme that cumulative impacts are addressed. Updated information on all MPU improvements would be periodically incoxporated into the SMP as necessary. The Airport Surveillance Radar (ASR), which is being relocated as a result of other MPU improvements, was not evaluated with other MPU projects. It is located outside of the active STIA footprint on the west side acquisition area. Although total impervious area on the site will decrease from 1994 to 2006, effective impervious area (EIA) will increase. Level 2 flow conlrols will be provided to meet the target flow regime discussed in Section 2.1.3 (the predeveloped condition is adjusted to assume 75 percent forest; the 3 percent EIA is less than 10 percent and…

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PSCAA Advisory Council Meeting Agenda
Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
1904 3rd Avenue, Suite 105, Seattle, WA 98101
Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]