The population of college-going students from diverse backgrounds is increasing (Western Interstate Commission on Higher Education [WICHE], 2020). However, minoritized students have traditionally been less well served by colleges and universities in terms of timely degree completion (U.S. Department of Education, 2020d). Small private colleges operate with largely enrollment and tuition driven budget models (National Association of College and University Business Officers [NACUBO], 2019; Sapiro, 2019), so serving an increasingly diverse student body is important to the sustainability of small private colleges from an economic perspective and from a mission-fulfillment perspective. Since private colleges have higher graduation rates overall and for minoritized students than public institutions (U.S. Department of Education, 2020c), they are and will continue to be an important path for minoritized students to earn a bachelor's degree. For these reasons, small private colleges will need to ensure they equitably serve minoritized students. This mixed methods case study sought to identify institutionally controlled factors which hold down on-time graduation for Black, Latinx, and Indigenous students at a small private college in the Pacific Northwest. The study used an equity lens (Bensimon, 2005) to examine institutional issues rather than student deficiencies as the cause of the gap in on-time graduation rates. Quantitative analysis surfaced and explored the gap between the on-time graduation rate for Black, Latinx, and Indigenous students and their White and Asian American peers. This information was further explored in interviews with 12 institutional faculty and staff members invited to participate based on their roles on campus. The qualitative portion of the study identified academic structures, institutional climate and communication factors, issues with how institutional goals are lived out in the day to day work of faculty and staff, as well as the way institutional change processes work as institutionally controlled systems and structures which contributed to the gap in the on-time graduation rate. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]