City and Borough of Juneau
Landslide is the general term for any type of downward movement of earth material. Some landslides occur rapidly while others might take weeks or longer to develop. Landslides usually occur in steep areas, and can be caused by human activities as well as natural processes.Human activities that trigger landslides are usually associated with construction that removes material from the base, loads material at the top, or otherwise alters a slope. Changing drainage patterns, groundwater level or slope and surface water can cause landslides. Removal of vegetation from steep slopes can erode the integrity of the ground and lead to landslides as well as general erosion.
Landslides are a significant hazard in the Juneau area because of the steep slopes and heavy precipitation. Several very destructive landslides have occurred in Juneau's history, especially in the area of Gastineau Avenue and South Franklin Street. Today, building codes and ordinances are in place to ensure that new construction will be able to withstand landslide impacts.
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