Preliminary permit application filed for 240-MW Lyon Mountain Energy Storage Project

The Moriah Hydro Corporation has filed an application for a preliminary permit to study the feasibility of the 240-MW Lyon Mountain Energy Storage Project.

The project, to be located in Clinton County, N.Y., would consist of a new upper reservoir with a storage capacity of 1,722 acre-feet, a new lower reservoir with a storage capacity of 2,296 acre-feet. Both reservoirs would take advantage of existing underground levels and voids within the rock confines of the Lyon Mountain mine.

Other project features include two water conveyance structures 15 feet in diameter and 2,000 feet long from the upper reservoir to the powerhouse, a water conveyance structure 15 feet in diameter and 2,000 feet long from the powerhouse to the lower reservoir, an 80-foot-wide by 300-foot-long by 40-foot-high underground powerhouse, a 40-foot-wide by 275-foot-long underground switchgear and equipment chamber, 100 turbine-generator units each rated at 2.4 MW, and a 1,000-foot long 115-kV transmission line from the powerhouse to an existing line.

The project would have proposed annual generation of 421 GWh and is being developed by Moriah Hydro Corporation.

Previously we reported on the 240-MW Mineville Energy Storage Project, also proposed for development by Moriah Hydro Corporation but located in Essex County, N.Y. The current status of that project is unknown but the arrangement is very similar to the proposal for Lyon Mountain.

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Elizabeth Ingram is content director for the Hydro Review website and HYDROVISION International. She has more than 17 years of experience with the hydroelectric power industry. Follow her on Twitter @ElizabethIngra4 .

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