HomeMy WebLinkAboutstormwater info from ownerProblem - storm Water
Solution - drain away from house Drain with Flex pipe to rear french drain
July 2021 storm water runoff after setpic system install resulted in signficant water pooling at the
basement door. After a series of test models to divert storm water to percolation fields, and installation of
a french drain diversion system, the storm water runoff issue was resolved.
13 Webster Rd, West Yarmouth
Water flow to back
(drain pipe is pitched
down approx 1/4" per
foot towards the arrow
end of the pipe where
french drain field is.
Basement door area drain to pipe approximately 30' back. The connecting
pipe has a pitch of 1/8 to 1/4" per foot. French drain field at rear.
Installation done in June 2021 - no problems with storm water. No pooling
and no basement seapage.
Significant rainfall in September 2021
provided model conditions. Storm
water is shown overdriving town
catchment system BUT not over
flowing 13 Webster property due to
septic system build contour.
Model terrace system to percolation areas at the rear
of the property resulted in significant decrease in storm
water flow toward basement door. The later addition
of a basement door area drain to pipe to rear property
french drain would eliminate remaining storm water
flow. The basement area has been dry since.
Subsequent addition of terraced percolation fields followed
original land contours but provided areas for storm water
to percolate into the ground table.
September 2021:
Storm flow study: a series of storm flow channels to guide storm water to percolation fields and
the effects studied determined where fields and terrace placements could occur to affect the
most reliable storm flow control and percolation to the ground table.