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Capitol Grounds Superintendent's Office

Capitol Grounds preparing plant beds for spring bulb planting on the upper west terrace.

The Capitol Grounds jurisdiction is responsible for preserving and maintaining over 290 acres of landscape and infrastructure across Capitol Hill, including the 2011 addition of Union Square — the 12-acre site situated between the Capitol's West Front and the National Mall that was transferred to the Architect of the Capitol (AOC) from the National Park Service.

The jurisdiction performs routine and periodic landscape maintenance, mowing, comprehensive tree care and upkeep of the supporting infrastructure, vehicles and equipment. The jurisdiction maintains 18.5 miles of sidewalks; 8.5 miles of driveways, parking lots and irrigation systems; and preserves and maintains the historic stone walls, ornamental fountains and other decorative features. Snow and ice removal, trash collection and support for major events (such as the annual December Christmas Tree Lighting Ceremony) also fall under this jurisdiction's responsibilities.