Tigard to assume service for small southwest water area from TVWD; staff outline schedule, costs and inspections

Senior Project Engineer Ross Horton presented a briefing on an intergovernmental agreement under negotiation with the Tualatin Valley Water District (TVWD) to transfer responsibility for water service in a small area south of Highway 217 (Southwest Barnes/Cherry Drive) to the City of Tigard.

Horton said the service area currently includes 73 connections (71 residential, 1 commercial, 1 fire service) served by a single pipe across the 72nd Avenue overpass. He said Tigard expects an additional average demand of about 20,000 gallons per day and a maximum daily demand on a hot summer day of roughly 38,000 gallons, which he described as "negligible" against Tigard's 6.5 million gallon typical daily demand. Horton said the transfer would involve TVWD transferring system assets (hydrants, mains, valves) to Tigard, TVWD performing asset inspections and any required repairs beforehand, and Tigard installing its own meters and radio equipment.

Horton gave a preliminary financial estimate for meter equipment and parts of about $22,000 and said the city expects approximately $75,000 per year in water revenue from the new customers based on historical consumption data. He said Tigard and TVWD are targeting a transfer date of "October 6" aligned to TVWD's billing cycle and that communications to affected customers will begin in August. Councilors asked about asset age and verification; Horton said the infrastructure was installed in the 1970s, TVWD will inspect and repair assets prior to transfer, and Tigard staff will independently verify conditions using leak-detection and field checks before accepting ownership.