Stimson Lumber Company Fire Pump and Building Addition

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Stimson Lumber Company Fire Pump and Building Addition

Morrison-Maierle was retained to design a fire pump and piping system in accordance with National Fire Protection Association (NFPA) guidance document NFPA 20. It was needed to replace an existing system that was impacted by removal of the Milltown Dam.

Stimson Lumber Company drilled and tested a new well capable of yielding in excess of 1.5 times the 2,000-gallons-per-minute design flow required by the fire pump system. The system consists of a 360-horsepower, diesel turbine pump. In order to comply with NFPA 20 requirements, the engine was outfitted with a patented “pressure limiting driver” feature that limits the churn pressure output. The fire pump system package includes 10-inch and 12-inch steel mainline piping, 6-inch steel piping, and flow meter for periodic pump performance testing, a 425-gallon diesel storage tank, pressure relief valve, combination air valve, cushioned check valve, isolation valves, and a controller. All major system components are listed by Underwriters Laboratories (UL).

In addition to the fire pump system design, Morrison-Maierle was also responsible for the structural, electrical, mechanical, and architectural design required to obtain
building permits for the addition to house the new pump system.

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