The Village of Millbrook, located in Dutchess County, New York, owns and maintains a Public Water Supply and distribution system that delivers potable water to approximately 1,400 customers within the Village of Millbrook and the Town of Washington. The Village PWS provides potable water by a series of infiltration galleries installed within a gravel aquifer adjacent to Shaw Brook and Mill Brook. The system was constructed in the 1930s, with minor changes to the design over the years. In 2006, the U.S. Environmental Protection Agency (EPA) published the Long Term 2 Enhanced Surface Water Treatment Rule (LT2ESWTR) to improve control of microbial pathogens. The LT2ESWTR requires source water monitoring at public water systems (PWSs) that use surface water or ground water under the direct influence of surface water (GWUDI).
Based on microscopic particulate analysis (MPA) testing, it was determined that the source water from these infiltration galleries was under the direct biological influence of surface water (GWUDI). As a result, the Village retained Delaware Engineering to undertake a project to design and construct a new water filtration system that will provide the sufficient level of treatment required. This treatment facility will also address other existing deficiencies within the water supply, treatment, and storage system. The project is slated to begin construction in the 4th quarter of 2019.
Also as a part of this improvement project, the Village’s 500,000-gallon water storage tank, which was also constructed in the 1930s, required sand blasting and recoating to protect and maintain the integrity of the steel. The Village retained Delaware Engineering to design and manage the rehabilitation of their finished water storage tank. This project was completed in the 2nd quarter of 2019.
The Village and Delaware Engineering were successful in acquiring grant monies through the NYS WIIA grant program and were awarded in excess of $1 million, as well as an additional $200,000 from Dutchess County.