Mount Vernon ice house

How it is built

Materials

• Wood planks
• Straw
• Earth and sod
• Sawdust

1. George Washington's ice house at Mount Vernon was a fixed cold-storage structure on the steep bank above the Potomac River. The Mount Vernon historical account describes a dry well dug into the hillside and encased by an outer wall of wood planks. It says a three-to-four-inch layer of straw filled the space between the well and the wall, while an arched top covered with earth and sod added insulation. The account also mentions covering the ice with sawdust. A ten-foot ladder allowed workers to retrieve ice from the well.
2. A separate 1798 estate inventory lists an “Ice house 12 feet square Arched with bricks.” The sources do not explain how that brief inventory description maps onto every construction detail in the later account or whether all details refer to the same building phase. The inventory and the Mount Vernon description are therefore reported separately rather than combined into an invented blueprint.
3. The structure stored ice harvested from the Potomac during winter, not food inside the well. Mount Vernon reports that enslaved people at the estate cut blocks from the river, brought them ashore and transported them up the hill. Weekly reports from 1792 record a two-week ice-collecting effort. In 1784 Washington thanked Robert Morris for describing an ice house and said he intended to build one that summer or fall. In 1794 he pressed his farm manager to fill it while freezing weather continued.
4. The stored ice extended seasonal cooling into warmer weather. Mount Vernon says it enabled the Washington household to enjoy fresh meats and cold drinks after spring; the same account notes ice cream as one of the fashionable uses of ice. The pit was therefore part of a larger food and household system: the structure protected the ice supply, while workers harvested, carried, packed and retrieved it.
5. This is one estate's late-eighteenth-century installation, not a general design specification. The sources document an ice well, hillside setting and insulating materials, but they do not give a modern thermal performance model, year-round temperature, drainage plan, safe structure dimensions or preservation instructions. The labor record also matters: the people who collected and moved the ice were enslaved workers, not a generic household workforce.

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