seasonal high water table
seasonal high water table
(OP)
Hello all...
I am looking for good information on estimating the seasonal high water table elevation. (without setting a monitor well and observing for a year). This would be used for purposes of determining the minimum bottom elevation for infiltration areas (2' above the SHWT). I know sometimes "mottling" of the soil is used, but I have done plenty of borings where such evidence is not found, even though GW was found. thanks in advance.
I am looking for good information on estimating the seasonal high water table elevation. (without setting a monitor well and observing for a year). This would be used for purposes of determining the minimum bottom elevation for infiltration areas (2' above the SHWT). I know sometimes "mottling" of the soil is used, but I have done plenty of borings where such evidence is not found, even though GW was found. thanks in advance.





RE: seasonal high water table
There is nothing like digging a hole after a year of 100 year storms. Short of that however, the city or county should have information on the SHWT for your area.
Regards
Dave
RE: seasonal high water table
Their website might even have some info.
RE: seasonal high water table
You mention borings and mottling, I am a soil evaluator in Mass. (septic system requirements) and from experience, you aren't likely to see the redoxymorphic features without a deep hole test pit. If you don't find mottling, you can pick the bottom of the pit as the seasonal high groundwater level and add a safety factor if you wish. Here is more on redoxymorphic features: http://nesoil.com/properties/eshwt.htm