SCH Number 2021050374

Project Info

Title

City of Dorris Wastewater Collection and Treatment Project

Description

The project includes improvements to the City’s wastewater collection system, Seattle Street Lift Station (LS), and wastewater treatment plant (WWTP) that are required in order to repair and replace aging infrastructure and improve efficiency in the wastewater treatment process. Improvements include replacing ±3,120 linear feet of 6-, 8-, and 10-inch sewer line and installing ±27,400 linear feet of cured-in-place pipe lining in existing sewer lines. The Seattle Street LS would be converted to a wet well and miscellaneous equipment would be upgraded and/or replaced. The force main between the LS and the WWTP would be replaced. Improvements at the WWTP include constructing a new headworks, an aeration basin and associated improvements, a separate disposal area in existing Pond 2, and a ±62-square-foot control/blower building. A SCADA system and emergency back-up generator would be installed. The existing access road from US 97 to the WWTP would be regraded and relocated within the City’s existing 20-foot-wide easement; an overhead power line to the WWTP would be installed immediately north of the road in a new 15-foot-wide utility easement. Underground electrical lines would be installed from the new electrical service to the new control/blower building. Groundwater monitoring wells would be installed around the WWTP. If funding allows, a photovoltaic solar system would be installed on the WWTP property south of the new aeration ponds.

3 documents in project