Portland Fire responds to third alarm industrial fire overnight.

At 12:29 AM BOEC tapped out a commercial fire in the NW Industrial District at the Owens Corning Portland Roofing Plant with reports of a commercial fire alarm. This industrial plant is located near the corner of NW Yeon and NW 35th Ave. The initial reports were of a water flow activation from the interior fire suppression system that automatically contacts the dispatch center with information of a possible fire. Crews arrived to find plant personnel evacuating and a significant amount of smoke pushing from a centrally located smokestack of the facility. There was an initial concern that water application would be ineffective in addressing this fire leading the command officer to request Foam Unit 24 (FU-24) and the large foam firefighting equipment housed at the airport by PDX Port Fire. In the end, an internal sprinkler and large bore hose lines banking water off the roof cooled and extinguished the flames. There were no reported injuries.

As crews were arriving there was a significant amount of smoke pushing out of a centrally located smokestack with plant personnel evacuating the structure. The loud internal warning system that was directing people to evacuate the building due to fire was looping each 15 seconds with the message “Fire – Evacuate the building – Fire – Evacuate the building”. This industrial plant produces roofing materials, and the large machinery used to heat up a tar solution to apply to roofing tiles was on fire with flames showing from the machinery that is used to heat up and move the solution through the plant.

Plant personnel met with arriving crews and stated that application of water on the fire is not advised as there would be a large and volatile steam reaction of the water onto the hot tar product. There was an inhouse CO2 extinguishing fire suppression system in place that was activated and overrun by the amount of fire present in this emergency which alarmed both plant personnel and responding crews. This directed the command officer to request the multiple foam units along with the PF&R Hazardous Materials Team and Coordinator. There was a concern that the fire would extend from the machinery into the pans and troughs filled with the slurry of tar products and extend to the multiple storage tanks on the exterior of the structure located on the complex. This increased fire activity could lead to the entire storage vats becoming overrun with fire with a significant amount of stored fuels involved. To be certain there were enough firefighters on scene to address what could have potentially been a long and extended fire, the command officer requested up to a third alarm assignment during the arrival, education, and planning phases of this emergency response.

The priority of the responding firefighters was to find the power shut off to stop the flow of electricity into the machinery. This securing of the electrical system was performed by a crew early on with the assistance and direction of plant personnel. Once power had been secured, a fire suppression plan could be enacted. This initial plan involved large amounts of foam from the specialized fire apparatus on scene from PF&R and Airport Fire to flow a foam solution safely into the area affected by flames to extinguish the fire to not have a steam production emergency due to the water hitting the hot tarry solution.

Crews on the interior noticed a single interior fire sprinkler head had been activated and was raining down water onto the machinery and was able to connect with plant personnel to discover that water can be applied to the machinery but direct waterflow into the pans and troughs filled with the slurry of hot tar is ill advised due to the possible steam production. This redirected command to put two large bore nozzles hoses in place on the interior of the facility to bounce off the ceiling and rain down water to cool and extinguish the flames within the machinery of the plant.

The elimination of the electricity to the machinery along with the large amounts of water raining down on the area affected by bouncing the water off the ceiling suppressed the fire in a 10-minute period. Quick extinguishment of this large industrial fire resulted in a small amount of damage to the facility. All water used in extinguishing the flames was captured by the in-house water retention system and not released back into the municipal water system. The bulk of the second alarm assignment was released within the first hour of the incident with PF&R crews remaining on scene to assist plant personnel in wrapping up this emergency.

PF&R would like to thank the dispatchers at BOEC for their assistance along with PPB Patrol Officers who provided traffic control allowing our crews to operate safely along HWY 30/NW Yeon. PF&R would also like to thank the members of PGE for responding to the site to assist in addressing the flow of electricity in the aerial powerlines in the area.