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Permanent road deactivation, Wellbore Channel, Johnstone Strait, Campbell River Forest District: project completion abstract Cullen, Michael
2004
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Abstract: The project involved permanent deactivation of 21.5 km of road. The roads are located in TFL 47 in TimberWest?s Johnstone Strait Operation. The objectives of the work were to reduce the potential for soil erosion, sedimentation of fish streams, mass wasting, and to help restore hill slope hydrology. Values at risk included fish habitat, visual, and forest resources (trees and roads). The following roads were permanently deactivated: D?Arcy Mainline, D0, D5, D6, D8, D11 SN9, SN9A, SN9B, SN9A3, SN9A4 The deactivated roads crossed moderate to steep gradient slopes. Surficial materials consisted of a veneer to blanket of colluvial soil over bedrock. Pockets of a silty sand morainal soil were present on lower slopes. The roads were constructed in the 70?s and 80?s using conventional cut and fill methods. On steeper slopes 3/4 or full bench construction methods were used; however, most of the excavated material was sidecast. Tension cracks and slumping were common along the edge of the road fill slopes. Landslides had initiated from the D?Arcy Mainline. The D?Arcy Mainline, SN9A3, and portions of D11 had been previously deactivated. However, the level of deactivation did not meet present standards. The risk on these roads was considered to be moderate to high.
 
Cullen, Michael. 2004. Permanent road deactivation, Wellbore Channel, Johnstone Strait, Campbell River Forest District: project completion abstract. Forest Investment Account (FIA) - Forest Science Program. Forest Investment Account Report. FIA2004MR051
 
Topic: FLNRORD Research Program
Keywords: Forest, Investment, Account, (FIA), Road, Construction, British, Columbia, Riparian, Areas, Management
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