However, the dozer line that was put in on top of the ridge north of Haystack Mountain during the 2004 fire season and re-opened as a containment line for the Haystack Fire, will remain open as there was already a well-established trail along the fire break prior to the fire, Stevens said. In the case of the Haystack Fire, land managers don’t want to create any new access routes into the Caribou-Poker Creeks Research Watershed managed by the University of Alaska Fairbanks. dozer lines) that are created during a fire response. Suppression repair on State of Alaska lands typically includes closing off all new access points (i.e. The goal is to return conditions to as close to pre-fire conditions as possible, he said. Land managers pay close attention to the presence and condition of access routes prior to and after a wildfire. While some members of the public view dozer lines as potential new trails that increase access, that’s not necessarily the way land managers see it, Stevens said. Having water controlling infrastructure like water bars in place prior to breakup reduces potential for erosion, he said. Breakup is when there is the highest potential for erosion due to spring snow melt. It is best to have all suppression repair work complete before hard winter sets in so the ground is prepped for spring breakup, said Stevens. Properly installed water bars not only divert water away from unwanted areas, but also slows the water down, lessening the potential for erosion.” Those situations include dozer lines created on an important connector or corridor road/trail, dozer lines that obliterate the core of a single-track or 50-inch trail network, and non-route. “Putting vegetation back in place over cleared ground helps to re-establish the insulating layer. For the purpose of this article, QWR will focus on post wildfire recovery prescriptions for three different types of dozer line impacts to system routes. “The main goal of suppression repair is to stabilize disturbed soils as much as possible,” Stevens said. Dozer lines can vary in width from a single dozer blade to many dozer blades wide, depending on the type of vegetation burning. By constructing a series of water bars at different intervals along a dozer line, the volume of water flowing down the line is reduced, as is the potential for erosion. A water bar is typically a diagonal channel cut across the dozer line that diverts surface runoff as a result of rain or spring snow melt so it doesn’t carve ruts into the soil. Water bars are also constructed to channel water off any cleared lines to prevent erosion, especially on slopes. Dozer preparation on the Tiger Island Fire. Crews are given assignments and important updates. Morning Briefing on the Tiger Island Fire Morning briefing sets the stage for the day. Tiger Island Fire Smoke Outlook Morning Briefing on the Tiger Island Fire. Doug Younce/Alaska DNR-Division of Forestry Dozer Line on Tiger Island Fire Tiger Island Fire Smoke Outlook. The excavator pulled vegetation that was cleared to create a control line back onto the dozer line to return it to it’s natural state as much as possible. Before and after photos of a section of dozer line that was recently repaired on Septemfollowing suppression of the Haystack Fire north of Fairbanks.
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