Water Treatment Plant Improvements

South Rivanna Water Treatment Plant Improvements

The South Rivanna Water Treatment Plant recently completed significant upgrades as part of the Urban Granular Activated Carbon project.  Over the course of that project, several other significant needs were identified and assembled into a single project within our Capital Plan.

Observatory Water Treatment Plant Improvements

The Observatory Water Treatment Plant is the oldest of the three urban plants.  The Observatory Water Treatment Plant was originally constructed in the mid-1950s.  Since that time very little has been replaced or upgraded at the facility.  The sixty-year-old facility has much of the original equipment that is inefficient, prone to unexpected failure, and does not have readily accessible replacement parts. In addition to providing needed equipment upgrades, the improvements will also increase the plant’s capacity from 7.7 million gallons per day to 10 million gallons per day.

Crozet Water Treatment Plant Improvements & Beaver Creek Dam Alterations

The Crozet water treatment system is currently permitted and rated to supply up to 1.0 million gallons per day (mgd) of water to the ACSA distribution system.  Over the past several years, average day usage of water has increased steadily, with maximum day demand approaching plant capacity.  In addition, much of the existing plant systems are the same as when the plant was constructed in the 1960’s. The improvements include increasing the plant’s capacity to 2.0 mgd.

RWSA operates the Beaver Creek Dam and reservoir as the sole raw water supply for the Crozet Area. In 2011, an analysis of the Dam Breach inundation areas and changes to Virginia Department of Conservation and Recreation (DCR) Impounding Structures Regulations prompted a change in hazard classification of the dam from Significant to High Hazard. This change in hazard classification requires that the capacity of the spillway be increased. Work for this project will be coordinated with the new relocated raw water pump station and intake.