Montesano, WA - The Grays Harbor County Emergency Management Agency verifies road conditions prior to listing them as "reopened" so please be aware that this list may be updated/outdated at any time. Do NOT drive through water over a roadway.
Landslide Warning Signs (from the USGS)
· Springs, seeps, or saturated ground in areas that have not typically been wet before.
· New cracks or unusual bulges in the ground, street pavements or sidewalks.
· Soil moving away from foundations.
· Ancillary structures such as decks and patios tilting and/or moving relative to the main house.
· Tilting or cracking of concrete floors and foundations.
· Broken water lines and other underground utilities.
· Leaning telephone poles, trees, retaining walls or fences.
· Offset fence lines.
· Sunken or down-dropped road beds.
· Rapid increase in creek water levels, possibly accompanied by increased turbidity (soil content).
· Sudden decrease in creek water levels though rain is still falling or just recently stopped.
· Sticking doors and windows, and visible open spaces indicating jambs and frames out of plumb.
· A faint rumbling sound that increases in volume is noticeable as the landslide nears.
· Unusual sounds, such as trees cracking or boulders knocking together, might indicate moving debris.
Areas that are generally prone to landslide hazards
· On existing old landslides.
· On or at the base of slopes.
· In or at the base of minor drainage hollows.
· At the base or top of an old fill slope.
· At the base or top of a steep cut slope.
· Developed hillsides where leach field septic systems are used.
Areas that are typically considered safe from landslides
· On hard, non-jointed bedrock that has not moved in the past.
· On relatively flat-lying areas away from sudden changes in slope angle.
· At the top or along the nose of ridges, set back from the tops of slopes.
