Mass. Electric Construction Co. is currently working with its affiliate Kiewit Constructors Inc. on the rehabilitation of mechanical rooms, the removal of existing air vacuum valves, the reinstallation of existing air vacuum valves installation of new isolation valves, and installation of FRE conduits and all associated wiring, junction boxes, and electrical work for the existing East River and North River Tunnels.
The scope of work includes construction of a temporary disinfection system to inject chlorine into the treated wastewater, while a total demolition and reconstruction of the existing system is completed. The work includes: mechanical and concrete demolition, new foundations, structural modifications, FRP tank installation, pumps, piping, electrical, instrumentation, testing and startup.
The scope of work includes constructing a new chlorine contact tank and modifying the existing headworks building, including the replacement of the grit removal system, mechanical bar screen, screw and belt conveyors. Also, the crew replaced the clarifier equipment, performed chemical feed modifications at the headworks building and installed new odor control equipment in three 85-foot-diameter primary clarifiers, two 85-foot-diameter secondary clarifiers and a 115-foot-diameter secondary clarifier.
The scope of work included removal of the existing RBC equipment, which required coordination with plant operational personnel as to maintain plant treatment levels while biological trains where taken off line. The work included replacement of 18 RBC units for 21.5’w x 12’l tanks, making up 3 trains with 6 units in each, the RBC media replacement was with varying densities of media for enhanced treatment.
Construction of a 5.15 MGD water filtration plant including raw water wet well and pumps, chemical feed systems, two-stage pressure filters, CT tanks, a finished water pump, backwash water supply pumps, a backwash equalization pump, a recycle pump, a wastewater pump station, and a backwash equalization tank. Associated structural and architectural work, site work, underground piping, site grading, landscaping, and access roads are also included.
The scope of work included construction of a pump station, force main, wastewater treatment plant and outfall pipeline. The 14,000-square-foot split-face block operations building required a gravity thickener, two primary settling tanks, two secondary settling tanks, rotating biological contactors, post aeration, chemical feed systems and ultra violet disinfection.
The scope of work included replacement of influent pumps requiring temporary pump around system and this work being performed during low flow conditions with no predicted precipitation and coordination with plant operators. Modifications also included; new seal water system with pumps, tanks and associated equipment, replacement of mechanical bar screen and removable grinder in the influent channel. Existing wet well was modified by construction a new concrete wall to provide isolation. The pump station upgrade included new electrical work and motor control center and instrumentation for automatic control of the station.
The scope of work includes construction of an influent pump station, headworks with fine screen and grit removal, Sequencing Batch Reactors (SBR), an equalization basin, continuous backwashing up-flow sand filters, a membrane microfiltration, sludge storage as well as thickening, dewatering and odor control.
Jett Industries Inc. is a subsidiary of Kiewit Corporation. This link will direct you to Kiewitjobs.com where you’ll find a comprehensive list of all Kiewit and subsidiary staff opportunities. If you would like to view Jett jobs only, use the search tool to narrow results.
Route 7, PO Box 219
Colliersville, New York 13747