From the PEREC Blog: What’s at the Bottom of the Potomac River?

Ever wondered what’s at the bottom of the Potomac River?  Dedicated PEREC scientists who have been gathering data to track the health of the Potomac River for some three decades.

Read the blog post by Chelsea Gray here:


Important Dates for Students

SPRING 2020 Semester (modified due to COVID-19)

MLK Day (university closed): Jan 20

First day of classes: Jan 21

Spring Break (extended): Mar 9-20

Dissertation/Thesis Deadline: May 8

Last day of classes: May 11

Reading Day(s): May 12

Final Exam Period: May 13-20

University Commencement: May 22 (tentative)

COVID-19 DATE CHANGES – For the complete modified spring calendar, see and for latest COVID-19 updates, see: