The water creates a bridge across the street and shows the flow of rain water and waste water under the street flowing down east to the river.


The Fannie Cox Center for Science, Math and Technology, Friends’ Central School, Wynnewood, Pennsylvania


Sandblasted Pennsylvania bluestone, quarried from Delaware River headwaters in Hancock, NY

30-foot-diameter map, 27-inch-tall benches

In collaboration with Gund Partnership, Architects

Commissioned by the Friends’ Central School

Funded through a generous grant from Barbara and Ted Aronson

Water Map details a section of the Delaware River watershed surrounding the Friends’ Central School. When it rains, the map carries water through the carved runnels, creating a watershed in miniature. With curved benches sandblasted with images of microorganisms from the waterways, the terrace serves as an outdoor classroom and gathering space.

To create the watershed in miniature, the terrace is tipped slightly so that rainwater will run first into the sandblasted runnels of the tributaries and then into the Delaware River.

Tributaries of the Delaware and Schuylkill Rivers are sandblasted into the bluestone, along with the names of other surrounding waterways and cities including reservoirs and historic streams.

The historic streams, which once flowed in this region, were put into culverts and pipes in the eighteenth century. Now these streams flow underground, out of view and out of mind. The historic streams, once part of the watershed, are pictured in this stone map and called out with a distinct font.

The map contains two views: a miniaturized aerial view of the Delaware River and surrounding waterways and enlarged views of the microscopic life forms that inhabit them.

Enlarged, freshwater microorganisms found in the local streams and rivers are sandblasted into the curved bench tops, along with magnified, brackish and marine organisms into the teaching bench.