This is a Sources Sought Notice for planning purposes regarding the future construction of two munitions storage igloos at Ellsworth AFB, South Dakota. The project involves demolishing two existing igloos and constructing new Earth Covered Magazines with associated site work, all within a secured munitions storage area requiring escorts. The period of performance for construction is 540 calendar days from the Notice to Proceed. The notice clarifies this is not a solicitation and the government will not pay for response costs. Small businesses are advised of subcontracting limitations regarding payments to non-similarly situated entities.