Mask Policy

Effective June 28, 2021

Summer Classes

Cloth face masks that cover the nose and mouth are required for all people, regardless of vaccination status, while participating in indoor courses or labs. Masks are not required for classes held outdoors but are recommended when individuals cannot maintain physical distancing (3 feet or greater).


Individuals who are fully vaccinated can go without masks inside buildings at Mines, except in classes as previously noted or in buildings or spaces when designated.

Individuals who are not fully vaccinated, including those who are unvaccinated, between the first and second doses of a two-shot vaccine, or within two weeks of their final vaccine dose, are strongly encouraged to continue wearing masks in all public indoor spaces or in private offices and laboratories when others are present.


Masks are not required when outdoors on campus, unless specifically stated as a requirement to attend or participate in an outdoor special event, organized gathering or activity.

Public and Group Transportation

Federal law requires both vaccinated and unvaccinated people over the age of 2 to wear masks on planes, buses, trains and other forms of public transportation including ride-shares and the planned Mines autonomous shuttle.

Important Considerations and Definitions

  • More restrictive mask requirements may be implemented by programs or offices with the approval of the appropriate VP.
  • Any additional mask requirements established by the State or County through a public health order are in effect at Mines.
  • Please keep in mind that many in the campus community will choose to continue to wear a mask at all times, even if vaccinated. We must honor and respect one another’s decision to do so.
  • Full vaccination is achieved two weeks after the second dose in a two-dose series of COVID-19 vaccine, such as the Pfizer or Moderna vaccines, or two weeks after a single-dose vaccine, such as the Johnson & Johnson/Janssen vaccine.
  • Supervisors, colleagues, instructors, advisors and others should not ask students or employees about their vaccination status.
  • A properly worn mask completely covers the nose and mouth. Cloth masks should be made with two or more layers of breathable fabric that is tightly woven. If gaiters are worn, they should have two layers of fabric or be folded to create two layers.