One of President Donald Trump’s pet projects to mark the 250th anniversary of American independence is set to be built on a vigorously demanding construction schedule.

The soaring triumphal arch, designed to sit between the Lincoln Memorial and Arlington National Cemetery, would require a 20-hour-a-day work schedule over two to three years, according to National Park Service documents published in the Federal Register. Plans for the monument indicate it will be a five-level structure, with an observation deck and a mezzanine level that could contain exhibit space, restrooms, a café, and a gift shop.