Job 158
The scope of work for this project consisted of addressing priority improvements identified in the City of Dunsmuir’s Master Water Plan. Improvements consisted of, but were not limited to removal and replacement of the existing parallel 12-inch steel water pipes with a single 18-inch steel pipe in the same alignment. Installation of isolation valves, sample taps, and overflow lines to the existing drainage for each spring. Demolition and replacement of five existing concrete spring boxes with new concrete spring boxes and sanitary sealed access hatches to improve security of the spring resources from vandalism and contamination. Demolition and replacement of the weir building with a concrete retaining wall and a vault containing flowmeters and piping to maintain the existing hydraulics. Existing culverts were replaced and a new drain box was installed adjacent to the vault. Installation of Supervisory Control and Data Acquisition (SCADA) systems on the existing emergency chlorination facility and the new overflow and diversion flow meters. Addition of 4-inch thick gravel fill along the access pathway. Updates to the existing SCADA system at the North Dunsmuir Tank, including replacement of the existing antenna and modifications to the existing control panel. In addition, a new permanent chlorination structure and emergency chlorination was implemented.
