Portland State University PDXScholar Dissertations and Theses Dissertations and Theses 1-1-2011 Hydrogeology of the McKinney Butte Area: Sisters, Oregon Joshua Andrew Hackett Portland State University Follow this and additional works at: https://pdxscholar.library.pdx.edu/open_access_etds Let us know how access to this document benefits ou.y Recommended Citation Hackett, Joshua Andrew, "Hydrogeology of the McKinney Butte Area: Sisters, Oregon" (2011). Dissertations and Theses. Paper 371. https://doi.org/10.15760/etd.371 This Thesis is brought to you for free and open access. It has been accepted for inclusion in Dissertations and Theses by an authorized administrator of PDXScholar. Please contact us if we can make this document more accessible:
[email protected]. Hydrogeology of the McKinney Butte Area: Sisters, Oregon by Joshua Andrew Hackett A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Geology: Geohydrology Thesis Committee: Robert B. Perkins, Chair Michael Cummings Kenneth Lite, Jr. Portland State University ©2011 Abstract McKinney Butte, a late Tertiary andesite vent and flow complex, is located near the town of Sisters, Oregon, in the upper Deschutes Basin, and is situated along the structural trend that forms the eastern margin of the High Cascades graben (Sisters fault zone and Green Ridge). Rapid development and over appropriated surface water resources in this area have led to an increased dependence upon groundwater resources. A primary concern of resource managers is the potential impact of expanding groundwater use on stream flows and spring discharge. Two sets of springs (McKinney Butte Springs and Camp Polk Springs) discharge to Whychus Creek along the east flank of McKinney Butte, and during low-flow conditions supply a substantial component of the total flow in the creek.