RETC welcomes conference attendees from around the world. If you plan to attend RETC from outside the United States, a U.S. visa may be required. For the best conference travel experience, begin your preparations early.
The following important information will help you successfully navigate the visa application process. Please refer to the U.S. State Department website for more details.
You can check the estimated wait time for U.S. visa appointments in your country at the local U.S. Embassy and Consulate’s website. Please contact your nearest consulate as soon as possible to request an interview date. Expect extended wait times exceeding 5 months.
Registration and Letter of Invitation
You must first register to attend RETC before a letter of invitation request can be issued to support your visa application. SME will send a Letter of Invitation to paid registrants upon request. Requests for Letters of Invitation must include your name, job title, company name, mailing address (PO boxes are not acceptable), city, state/province, country, zip/postal code, phone, fax number, date of birth and passport number; as well as the beginning and end dates of travel. Please provide the address, phone and fax number of your local U.S. embassy. All items must be submitted to receive a Letter of Invitation. Note: Invitations are intended to help international delegates raise travel funds or obtain a visa. It is not a commitment from the conference or the organizers to provide any financial support.
Or send to:
SME Meetings Dept.
12999 E. Adam Aircraft Circle,
Englewood, CO 80112
Obtain a Visa or ESTA
Determine if you need a visa or if you are eligible for the Visa Waiver Program (VWP).
Attendees needing a Visa
If you need a visa to attend RETC, be sure to apply for the right kind of visitor visa. This is typically a B1 visa to “Attend a scientific, educational, professional, or business convention or conference for a business visit.” You will need:
a current machine-readable passport,
an in-person interview with the U.S. State Department consulate or embassy in the country where you live,
Attendees utilizing ESTA
You may travel to the U.S. for 90 days or less without obtaining a U.S. visa, if you’re a citizen of one of the 38 countries participating in the Visa Waiver Program. You must have valid Electronic System for Travel Authorization (ESTA) approval before travel. ESTA requires all international travelers to register in an online database and must complete an application on the ESTA website.
Note: SME cannot intervene on your behalf with the Embassy or U.S. Consulate via fax, phone, surface mail, or email. The U.S. State Department provides information on traveling to the United States regarding passports, international travel, and visas.
Bring all supporting materials related to RETC to your interview, including your Letter of Invitation, hotel and plane reservation confirmations, conference agenda and any other documentation supporting your participation in the event. Tips: Be prepared to demonstrate strong ties to your country. Consular officers review your application and consider proof of business ownership or employment, social and family relationships and other evidence as proof that you will return to your country. Previous travel to the U.S. or other foreign countries demonstrate good faith.
Over four decades of conferences, RETC provides both the experienced tunneling professional and the individual just starting in the business the opportunity to stay connected while integrating new ideas and innovations into contracting, design, and construction.
The Society for Mining, Metallurgy & Exploration Inc. (SME) is a professional society (nonprofit 501(c)(3) corporation) whose more than 15,000 membership represents all professionals serving the minerals industry in more than 100 countries. View More >>
Address: 12999 E Adam Aircraft Cir Englewood, CO 80112