The Ashburton Water Filtration Plant was constructed in the mid-1950’s and has been in continuous operation for over forty years. The plant is one of two major water treatment facilities serving Baltimore City and its 1.7 million customers. In recent years, the plant has been showing some serious deterioration especially over the past decade. This project was issued to address the filters and the remainder of the treatment facility not addressed under the recently completed sedimentation basin project.
The project will include replacement of the plant’s 40,000 square feet of filters along with improvements to chemical feed systems, renovations to the filtration building, and design of a new 48 inch transmission main. Several different filtration technologies will be investigated in order to determine which is best suited to meet current and future water quality regulations.
Previous improvements to the City’s distribution system were designed to accommodate the growing demand for drinking water. With the implementation of more stringent water quality regulations, the distribution system will need to be re-evaluated from a water quality standpoint. Under this project, two instances of short-circuiting in the distribution will be addressed. Approximately 1,000 feet of new 48 inch (suction) transmission main will replace an existing line which allowed water to bypass Lake Ashburton (finished water reservoir) directly to the distribution system. The new transmission main will improve water quality by increasing contact time needed for disinfection while at the same time, shortening the turnover time in the reservoir. The new transmission main will have to be coordinated with several other ongoing projects such as the Hillen by-pass transmission main already under design.