NeighborWorks Blackstone River Valley, located in Rhode Island, was an early adopter of geothermal technology. But it wasn't always smooth going, says Christian Caldarone, deputy director. He was forced to get a quick education on geothermal soon after he started his job. The organization used an open-looped system, relying on fresh groundwater to transfer heat, for The Meadows, bright, one- and two-bedroom apartments that look like they're part of a small village.