Construction Work Plan and Long Range Plan Studies

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Client: Public Utility District No. 1 of Ferry County

POWER prepared a load forecast, long-range plan, construction work plan, and environmental report to meet RUS guidelines and secure RUS funding for Ferry County PUD in northeast Washington. The PUD’s system consists of one mile of 115 kV transmission line, 56 miles of 34.5 sub-transmission line and 845 miles of 12.47 kV distribution line. A load forecast was developed based on historical records, and Washington State population projections.

The 10-year long-range plan was developed using Synergi software for Ferry County’s sub-transmission system and 14 distribution feeders served from six substations. Load flow analysis was performed at four intervals of the 10-year plan, with system loading based on the developed load forecast. For each of these intervals the system overloads and low voltages were mitigated. For most conditions multiple mitigation options were proposed.

The construction work plan was developed following RUS guidelines based on the long-range plan. Construction work plan system improvements consisted of installation of new line voltage regulators, reconductoring of lines, installation of 2nd and 3rd phases to improve power flow and facilitate system growth, and improvements to metering and reclosing equipment that will facilitate the development of a SCADA system.

An environmental report, also following RUS guidelines, was developed for the projects listed in the construction work plan.