Andrew Ellicott

**Andrew Ellicott**

**Definition:**
Andrew Ellicott (1754–1820) was an American surveyor and civil engineer known for his significant contributions to early United States boundary surveys and urban planning, including the layout of Washington, D.C.

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**Andrew Ellicott**

Andrew Ellicott was a prominent American surveyor and civil engineer whose work played a crucial role in the early development of the United States. Born in 1754 in Pennsylvania, Ellicott gained recognition for his expertise in surveying and mapping, which were vital to the young nation’s territorial organization and urban design.

### Early Life and Career
Ellicott began his career working with his father and brothers, who were also surveyors. His skills were soon recognized, and he was appointed to assist in important surveying projects. During the American Revolutionary War, he served as a military surveyor, which further honed his abilities.

### Major Contributions
One of Ellicott’s most notable achievements was his work on the survey of the boundaries of the District of Columbia. In 1791, he was commissioned to complete the survey and layout of the federal capital, Washington, D.C., following Pierre Charles L’Enfant’s initial plan. Ellicott’s precise measurements and adjustments helped establish the city’s street grid and landmarks.

Ellicott also surveyed the boundaries between several states, including Maryland and Pennsylvania, and worked on the survey of the Mississippi River. His work contributed to the accurate demarcation of state and national borders during a period of rapid expansion and change.

### Legacy
Andrew Ellicott’s contributions to surveying and urban planning have had a lasting impact on the United States. His meticulous work helped shape the nation’s capital and ensured clear territorial boundaries, supporting the country’s growth and governance.

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**Meta Description:**
Andrew Ellicott was an American surveyor and civil engineer known for surveying the boundaries of the District of Columbia and contributing to early U.S. urban planning and boundary demarcation.