Pennsylvania environmental regulators have green-lighted a proposal to use 3,950 tons of natural gas drilling waste for an experimental road construction project at a Lycoming County hunting club.

This approval marks the first time the waste– known as drill cuttings– can be re-purposed as construction material an area that’s not an industrial site. The work is being done by Clean Earth, the same firm that backed out of controversial plans to put 400,000 tons of drilling waste near Pennsylvania’s “Grand Canyon” last year amid a public backlash.

Drill cuttings are the waste dirt and rock that come up from deep underground in gas development and may contain naturally-occurring radiation and chemicals. Usually, cuttings are disposed of in landfills.