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July 20th, 2012

High river levels cause soil saturation, septic problems

SKAGIT COUNTY - Continuing snow melt in the mountains is causing above average flows in the Skagit River resulting in soil saturation in many low lying areas. The Skagit River has been above 20 feet for the past 30 days, according to Dan Berentson, Natural Resources Division Manager for Skagit County Public Works.

"We haven't seen these kind of river levels since the 1970's", said Berentson.

When the river is high, water tables along the banks of the Skagit River rise, causing flooding and saturation that affect the efficiency of septic systems. "This is basically a waiting game for nature to take its' course," said Berentson. "Above average snow pack and a late summer are contributing to this problem."

Septic system owners should take extra precautions:

• The septic system should not be used until the water in the drainfield area is lower that the water level around the house. Most septic systems will not be damaged by floods since they are below ground and completely covered. However, damage may occur to the septic system during prolonged periods of ground saturation.
• If toilets or drains inside the house are draining slower than usual, that's an indication that the system is saturated and the system not operating as it should. If possible, don't use the septic system (internal plumbing) until the water table recedes. If you need to use the system, do so sparingly. Laundry and showers should be done off site. Toilet and sink use should be minimal.
• Try to avoid any work around the saturated area. Equipment or compaction around the area will cause more severe damage during saturated conditions.
• When the water recedes, the system should be thoroughly inspected by a certified septic professional to ensure that the system is operating correctly. Silts and debris can infiltrate the septic tank(s) and accompanying drainfield during high water periods and may cause blockage of pipes and outlets. Pumping may be needed.
• Do not pump the tank during flooding or high water table conditions. An empty 1,000 gallon tank below ground could float during high water events. Wait until the water recedes and then contact a certified professional.
• Visit: www.skagitcounty.net/health for a list of certified septic professionals.

For additional information, contact Dan Berentson @ 360-419-3461.