FERC has issued a favorable environmental assessment of Questar Overthrust Pipeline's proposal to expand its mainline in Wyoming.

"Approval of the proposed project, with appropriate mitigating measures, would not constitute a major federal action significantly affecting the quality of the human environment," concluded Federal Energy Regulatory Commission staff, which had the the cooperation of the Bureau of Land Management [CP10-3].

Questar Overthrust proposes to build a 43.3-mile, 36-inch diameter loop along its system. The proposed loop pipeline would generally run parallel to the existing Overthrust Pipeline from Rock Springs Compressor Station southwest of Rock Springs in Sweetwater County, WY, westbound to a tie-in facility called Cabin 31 station in Uinta County, WY.

The facilities would provide up to approximately 800,000 Dth/d of natural gas capacity from receipt points on the east end of the Overthrust system to delivery points on the west end of its system, according to the pipeline. Overthrust said it hopes to have the expansion in service by the end of the year.

The proposed loop would facilitate deliveries to Kern River Gas Transmission and eventual deliveries to the proposed Ruby Pipeline, according to Overthrust.

Overthrust said it has negotiated three firm transportation service agreements with Wyoming Interstate Co. Ltd. for up to 548,457 Dth/d of incremental capacity to be created by the project. It has pegged the cost of the proposed loop expansion at $94.3 million.

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