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Nisqually NWR Final CCP/EIS Chapter 3. Affected Environment This chapter describes the environment that may be affected by land acquisition and management activities of Nisqually NWR. The affected environment includes important portions of the Nisqually delta and lower reaches of the Nisqually River watershed. For this document, the affected environment includes the CCP Study Area, which includes the lands within the currently approved Refuge boundary (3,936 acres) and the potential Refuge expansion areas (5,390 acres). The study area (Figure 1.1-2) includes four distinct areas: McAllister Springs and Creek area, Nisqually River corridor, Nisqually agricultural lands and floodplain, and East Bluff. The McAllister Springs and Creek area, Nisqually River corridor, and Nisqually agricultural lands and floodplain are located south of the current Refuge and are bordered on the north by I-5, on the east and west by bluffs, and on the south by a combination of railroad tracks, bluffs, and property boundaries of residential housing developments. The East Bluff area is east of the Refuge and is bordered on the north by Sequalitchew Creek, on the west by Puget Sound, on the south by I-5, and the eastern boundary follows property lines, including most of the forested habitat west of Fort Lewis. 3.1 Physical Environment Elements of the physical environment considered include climate, hydrology, geology, soils, and contaminants. 3.1.1 Climate Maritime air masses have a moderating effect in south Puget Sound year round, creating a modified Mediterranean climate. Air quality is generally high due to climate, location, and few industries that produce particulates.
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