Builders Providence

Water meter door at one of McMillian Sand Filtration Plant's Regulation Houses.

Gears turning Numbers

Water meter at one of McMillian Sand Filtration Plant's Regulation Houses.

Regulation House

Inside one of McMillian Sand Filtration Plant's Regulation Houses.

McMillian Filtration Vault #2

McMillan Reservoir Sand Filtration Site, Bloomingdale, Washington, DC. Opened in 1905, the slow sand filtation plant operated until the mid-1980s.

McMillian Filtration Vault #3

McMillan Reservoir Sand Filtration Site, Bloomingdale, Washington, DC. Opened in 1905, the slow sand filtation plant operated until the mid-1980s.

Arches, Columns, and Sand

McMillan Reservoir Sand Filtration Site, Bloomingdale, Washington, DC. Opened in 1905, the slow sand filtation plant operated until the mid-1980s.

McMillan Reservoir Sand Filtration Site, Bloomingdale, Washington, DC. Opened in 1905, the slow sand filtation plant operated until the mid-1980s.

Looking Down the Arch - B&W

McMillan Reservoir Sand Filtration Site, Bloomingdale, Washington, DC. Opened in 1905, the slow sand filtation plant operated until the mid-1980s.

Looking Down the Arch

McMillan Reservoir Sand Filtration Site, Bloomingdale, Washington, DC. Opened in 1905, the slow sand filtation plant operated until the mid-1980s.

McMillan Reservoir Sand Filtration Site, Bloomingdale, Washington, DC. Opened in 1905, the slow sand filtation plant operated until the mid-1980s.