The ExxonMobil Billings Refinery is one of the hundred largest refineries in the US located on 720 acres abutting the Yellowstone River. The Refinery has been recognized by the prestigious Wildlife Habitat Council for its efforts to conserve and restore natural ecosystems. Corval Group completed structural steel additions, soot blower replacements and tube replacements. This project was completed with integrated use of multi-craft workforce and contractors. We completed the final installation and boiler hydro within the allotted refinery shut down time. Corval also won the NMAPC Zero Incident Safety Award for our exemplary commitment to safety.