<!-- this taxobox is for generic bridge types, not specific (except as an example). The ancestor, sibling, and descendant references should follow the current taxonomy at media:BridgeTaxonomy.jpg, see also Talk:Bridge -->A log bridge is a bridge that uses logsNational Parks Conference 1915, p. 59. "The chief objection to a log bridge ... is the shortness of its life." due to soil contact and subsequent rot and wood-eatinginsect infestation. Longer lasting log bridges may be constructed by using treated logs and/or by providing well drained footingsNational Parks Conference 1915, p. 59. "If we can design the abutment so that no moisture can collect under the logs the life of the bridge is materially increased." of stone or concrete combined with regular maintenance to prevent soil infiltration. This care in construction can be seen in the bridge illustrated, which has well locked dry set stone abutments and a footpath leveled with boards.