The Webb Municipal Building is both Energy Star® and LEED-EB® Gold certified. It was designed to be 25 percent more energy efficient than a conventionally-built building. In 2003, this enabled the city to save $218,000 in energy costs.
The former Mile High Stadium, demolished in 2002 to make way for the construction of Invesco Field, still lives on in the form of steel reused in tracks for the metro area's T-REX light rail expansion.
Six million tons of concrete from the former Stapleton airport were recycled and reused in construction projects at DIA, Buckley Air National Guard Base, E-470, The Rocky Mountain Arsenal National Wildlife Refuge, and Bluff Lake Nature Center.
Denver has one of the largest light-emitting diode (LED) traffic light inventories in the country. The technology uses a fraction of the power to produce brighter, longer-lasting lights that are less expensive to operate. This saves the city nearly $800,000 per year.