The reservation land was first set aside for the Northern Paiute by request of the Bureau of Indian Affairs in 1859. The reservation was not surveyed until 1865. The status of the reservation was very uncertain until President Ulysses S. Grant affirmed its existence by executive order on March 23, 1874. At that time the creation of reservations by the executive branch was novel; most previous reservations were created by treaty or congressional legislation. Subsequent court decisions have affirmed the validity of reservations created by the executive branch, and have set the establishment date for the Pyramid Lake Reservation at 1859, not 1874. This earlier date is important both with regards to the priority date of tribal water rights, and the status of non-tribal claims to land within the reservation.