US Renewables Group

Newton, MA
Initial Investment: 2009

General Compression, LLC is a technology-enabled development company that will focus on developing and owning dispatchable advanced compressed air energy storage projects. General Compression's system transforms intermittent renewable energy sources into dispatchable, firm power sources suitable for peaking, intermediate, and baseload generation.

Reno, NV
Initial Investment: 2006
Integral Energy Management is a specialized development and asset management firm that focuses mainly on servicing the geothermal industry.

Integral Energy Management was sold to Oski Energy in 2008.

Houston, TX
Initial Investment: 2007

PipeStem Energy Group is a midstream energy company formed to own, operate, and acquire energy assets with focus on terminalling, storage, and renewable fuels infrastructure. PipeStem owns a 590,000 barrel storage terminal located on the Mississippi River in Marrero, LA, which the company plans to expand to 2 million barrels.

Minneapolis, MN
Initial Investment: 2011

Recovery Technology Solutions is a project development company focused on the extraction and recycling of asphalt and benefits from an exclusive technology licensing arrangement with Crown Iron Works Company.

Santa Rosa, CA
Initial Investment: 2006

ThermaSource is the premier provider of mission-critical drilling services to the rapidly growing geothermal power sector, including rigs and experienced crews, engineering and management expertise, exploration expertise and critical support services such as cement, drilling fluids and logging.