356, with permission of American Type Culture Collection, Rockville, MD.įigure 15.6. American Type Culture Collection, Rockville, MD, pp. Identification Manual for Fungi from Utility Poles in the Eastern United States. Electric Power Research Institute, Palo Alto, CA, (A and B) with permission: Electric Power Research Institute, Palo Alto, CA, and (C) and (D) Wang, C.J.K., Zabel, R.A. EPRI EL-2768, Final Report Project 1471-1. The fungal associates, detection, and fumigant control of decay in treated southern pine poles. (A) A brown cubical rot in the outer-treated lone, (B) advanced white rot in the untreated center, (C) soft rot as seen on surface of an older creosote-treated pole with the radial development indicated by white arrows, and (D) soft rot as seen on the below-ground surface of a cellon-treated southern pine pole displaying the typical cracking and exfoliation pattern. Examples of the major decay types in southern pine utility poles in service. In most regions, Douglas-fir is used for larger size poles, while southern pine comprises the majority of smaller poles.įigure 15.5. Commercial wood pole species in North America include Douglas-fir, lodgepole pine, ponderosa pine, red pine, southern pine and western redcedar. Because of this hazard, most utilities use either naturally durable wood species such as western redcedar, or they pressure-treat less durable woods with preservative. Decay in utility poles has been extensively studied because of the high degree of reliability demanded of electrical service and the availability of utility research support.Ī utility pole in direct soil contact is exposed to a high decay hazard, but must deliver 40 or more years of reliable service. There are an estimated 160 million wood poles in service in North America. Utility poles (or electric poles) are used to support the wires that bring power to most of North America. Morrell, in Wood Microbiology (Second Edition), 2020 Utility poles
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