From King County, These wells will determine if there is additional groundwater capacity during flooding or if the surface water is high enough that there is no drainage left.
Surface Water Monitoring Well Locations
From King County, These wells will determine if there is additional groundwater capacity during flooding or if the surface water is high enough that there is no drainage left.
How to Fill Sandbags
We'll be filling sandbags and staging them in advance of the expected flooding this winter.
We should decide on a date by the November 3rd committee meeting.
This is a document on filling and stacking sandbags.
Fill sandbags 1/2 to 2/3 full, tie at top so bag will lay flat when put in place. A properly filled sand bag should weigh between 35-40 lbs.
Overfilled bags and bags tied too low leave gaps in sandbag levee allowing water to seep through. An overfilled sandbag can weigh 70 - 75 lbs.
TIP: Always use gloves to protect your hands during the filling operation. After handling treated bags, avoid contact with your eyes and mouth. Dress appropriately and layer clothing. Safety goggles should be used on dry and windy days.
HOW TO PLACE SANDBAGS:
Sandbags should be placed flat on ground, overlapped, tamped into place, and stairstepped.
Remove any debris from the areas where bags are to be placed. Place the bags lengthwise and parallel to the direction of flow with the untied open ends of the bags facing upstream. Fill the low spots first before placing bags the full length of the area to be raised. Start at the downstream end of the sandbag operation about 1 foot landward from the river or levee's edge and continue upstream.
Fold the open end of the bag under the filled portion. Place succeeding bags with the bottom of the bag tightly and partially overlapping the previous bag. Offset adjacent rows or layers by one-half bag length to avoid continuous joints. To eliminate voids and form a tight seal, compact and shape each bag by walking on it and continue the process as each layer is placed. This flattens the top of the bag and prevents slippage between succeeding layers.
* Five feet is the practical limit of a sandbag levee. If a higher levee is needed, alternate means of construction should be considered.
** Preferred limit is 3 feet high.
We should decide on a date by the November 3rd committee meeting.
This is a document on filling and stacking sandbags.
HOW TO FILL SANDBAGS
Fill sandbags 1/2 to 2/3 full, tie at top so bag will lay flat when put in place. A properly filled sand bag should weigh between 35-40 lbs.
Overfilled bags and bags tied too low leave gaps in sandbag levee allowing water to seep through. An overfilled sandbag can weigh 70 - 75 lbs.
TIP: Always use gloves to protect your hands during the filling operation. After handling treated bags, avoid contact with your eyes and mouth. Dress appropriately and layer clothing. Safety goggles should be used on dry and windy days.
HOW TO PLACE SANDBAGS:
Sandbags should be placed flat on ground, overlapped, tamped into place, and stairstepped.
Remove any debris from the areas where bags are to be placed. Place the bags lengthwise and parallel to the direction of flow with the untied open ends of the bags facing upstream. Fill the low spots first before placing bags the full length of the area to be raised. Start at the downstream end of the sandbag operation about 1 foot landward from the river or levee's edge and continue upstream.
Fold the open end of the bag under the filled portion. Place succeeding bags with the bottom of the bag tightly and partially overlapping the previous bag. Offset adjacent rows or layers by one-half bag length to avoid continuous joints. To eliminate voids and form a tight seal, compact and shape each bag by walking on it and continue the process as each layer is placed. This flattens the top of the bag and prevents slippage between succeeding layers.
ESTIMATED NUMBER OF SANDBAGS PER
LINEAR FOOT OF WALL.
Height in feet
Bags Required
1 5
2 10
3** 21
4 36
5* 55
1 5
2 10
3** 21
4 36
5* 55
* Five feet is the practical limit of a sandbag levee. If a higher levee is needed, alternate means of construction should be considered.
** Preferred limit is 3 feet high.
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