DOE LM is proposing to install aerial survey monuments at the Ambrosia Lake disposal site. Aerial survey quality control monuments would be constructed at 6 proposed locations near the engineered disposal cell to provide reliable monuments for repeatable aerial surveys. Proposed work would include ground surveying of the locations and the placement of survey pins at all locations. All of the monuments would be located off of the disposal cell. A skid-steer loader, trackhoe, or backhoe would be used to dig holes to construct the monuments. Efforts would be made to minimize areas of land disturbance during monument construction. Care would be taken to drive the construction equipment on site roads or existing tracks to the extent possible. Refueling of equipment would occur at the site in accordance with a refueling plan.. The surveys are expected to be conducted by unmanned aerial vehicles (also called drones), aircraft, or helicopters, depending on the types of sensors being used. The survey data would facilitate long-term management of the disposal cell engineered cover. Once the monuments have been constructed, and permission is received from LM to proceed, aerial remote sensing surveys of the disposal site would be conducted as needed over time to support long-term site management activities. Ongoing maintenance of the aerial survey monuments would be performed in out years, as needed.