Undergraduate theses and other senior projects (eg art portfolios) are found on the Senior Projects Website. You can electronically submit your thesis/project here. Some academic departments keep copies of student theses. Contact the appropriate departmental administrative assistant to inquire about this possibility.
Doctoral Dissertations from The Graduate School of Education's Doctor of Education in Leadership (Ed.D.) program can be found in ProQuest's Dissertations & Theses at Lewis & Clark College database.