HomeMy WebLinkAboutDewatering Monitoring Plan0 Plan to Monitor Ground Movement During Dewatering
Dewatering will be monitored in the following ways at the site. I have also indicated the
responsible party to manage the process all the way through construction.
Monitoring Activity
Responsibility
Establish settlement points on each building on the adjacent
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properties. These points will be surveyed on a regular basis to
determine if movement is taking place. These measurements
could be done at regularly scheduled intervals, such as once a
week, unless conditions warrant more frequent testing.
Monitoring of ground surface monuments on the outside of
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the shoring wall, as well as, monitoring points on the face of
the shoring wall itself. These points will be surveyed on a
regular basis to determine if movement is taking place.
Surveying these points will take place on the same time
schedule as surveying the settlement points on each building,
see above.
The dewatering plan indicates the installation of 4
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piezometers inside the proposed limits of excavation. The
actual location of the piezometers will be subject to approval
by all parties. A piezometer is a device used for the
measurement of hydraulic head of groundwater in the ground.
These measurements could be done at regularly scheduled
intervals, such as once a day, unless conditions warrant more
frequent testing.
Monitoring at the dewatering discharge points of the
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dewatering system by means of both visual inspection and the
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use of a measuring device such as a Rossum Sand Tester. The
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Rossum Sand Tester and valve will be located between well
heads #6 and #7. These measurements could be done at
regularly scheduled intervals, such as once a day, unless
conditions warrant more frequent testing.
Monitoring of the nearby ground surface will also take place.
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Visual inspection to spot any ground movement will take
place once a day, unless conditions warrant more frequent
visual inspection.
If settlement is observed using any of the above monitoring methods, the dewatering
process will be stopped and a plan of action will be implemented to deal with the
situation.