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OHA Drinking Water Services Contact Report Details
PWS ID:	OR41 90174
PWS Name:	COLTON COUNTRY PLACE

Who Was Contacted:	Kristin McLaughlin
Contact Phone:	503-720-6244
Contact Date:	07/19/2023
Contacted By:	CIVIL WEST ENGINEERS, INC (DWP)
Contact Method/Location:	Field

Assistance Type:	CIRCUIT RIDER ASSISTANCE

Details:	Background/Problem Identification: Colton Country Place reached out to the circuit rider requesting assistance with the selection of an auto transfer switch for their newly acquired generator set. Assistance Provided: The circuit rider spoke at length with Jeff and Kristin from Colton Country Place, and a third-party integrator skilled in generator/pump/VFD/controller sizing and integration. Based on the available information from CCP: 11,000-watt single phase 240V generator, and a ~5 HP 230V three phase well pump motor the circuit rider has the following recommendations: • The system would need to install a rotary phase converter to convert the single-phase power to three-phase to run the pump. An RPC large enough to run a 5 HP pump would need to output roughly 90A to start the motor and at that size would cost $7,000 or more. Further, if this method was used, the 11,000-watt genset would be far too small to run the RPC (would require a 250A input to output 90A in three phase). • A 5 HP pump is very large for a water system that only serves 6 connections. If the water system switched out their 5 HP three-phase pump for a smaller single-phase pump (1 HP approx. cost $1,000), they should be able to run it with a simple transfer switch and their existing genset. • The system could also opt to upgrade their genset to an appropriately sized 3-phased genset for roughly $7,000. This would allow the water system to keep their existing well pump, but of course would require the purchase of a new genset. Follow-Up Actions Needed: The circuit rider can provide further follow-up assistance if needed.