Contracting a methane gas extraction system

Crews ensure the HDPE pipe stick-up is plumb and soil compaction requirements are met at the Rapid City (S.D.) Landfill, northeast of Mount Rushmore. Griffin Dewatering Corp. installed 35 methane gas extraction wells made of 6-inch HDPE pipe at depths ranging from 60 to 84 feet. All pipe fusing was performed on site.

At the Hardin County Contained Landfill near Elizabethtown, Ky., a crew from Griffin Dewatering Corp. prepares a Gus Pech Mfg. Co. bucket drill rig to begin constructing methane gas extraction wells. The wells were tied into the landfill’s existing system via 4-inch HDPE pipe buried in the topsoil.

At the Northampton County (Va.) Landfill, near the city of Cape Charles, Griffin Dewatering installed 20 passive landfill gas vents.

Solid Waste Contracting a methane gas extraction system Jerry Soto Public Works Manual

The methane shooting up from the HDPE pipe indicates a successfully installed extraction well. The Griffin Dewatering crew installed 24 methane gas extraction wells made of 8-inch HDPE pipe at depths ranging from 60 to 99 feet at the Hardin County Contained Landfill near Elizabethtown, Ky.

Griffin Dewatering’s two Mait/Caterpillar drill rigs were used to drill 35 methane gas extraction wells approximately 60 to 84 feet deep at the Rapid City (S.D.) Landfill. Two rigs were utilized simultaneously to expedite installation of the wells for the contractor to connect.

Griffin Dewatering installed 12 methane gas vents at the Higgerson Landfill, a construction and demolition (C&D) debris landfill in Chesapeake, Va.

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