The 2011 USA Sevens competition was held at a football stadium with an elevation how many feet above sea level?
2011 USA Sevens: The 2011 USA Sevens competition was held on February 12 and February 13 at Sam Boyd Stadium in the Las Vegas, Nevada area. Sam Boyd Stadium: Sam Boyd Stadium is a football stadium in Whitney, Nevada, United States, an unincorporated community in the Las Vegas Valley. Sam Boyd Stadium:  The field has a conventional north-south orientation and is at an elevation of 1600 ft above sea level.
1600