Link: Massey Energy Intranet.
The Elk Run dome is a first-of-its-kind air supported vinyl building to cover coal stockpiles, preventing coal dust from reaching nearby communities. The building is supported only by air pressure supplied by an electric blower. The blower also supplies fresh air while equipment is operating inside the facility. It is equipped with two additional back-up blowers and a back-up power generator to insure that no mechanical failure or power outage will cause the dome to deflate. The dome is the size of several football fields.
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