and wet describe the area where a Minnesota manufacturing company
wanted to expand their parking lot. The Spring of 2008 revealed
significant drainage issues in that compact corner of the property.
top soil was removed leaving a uniform clay base. A non-woven geotextile
mat was laid out for separation and stabilization. 12-inch Multi-Flow
collector lines were selected and installed at 15 foot intervals.
collector lines were terminated on the low end of the lot with multi-purpose
12-inch outlets. (1200M) These outlets were joined together with PVC
pipe to form the transport system. Mid-point in the transport line
a tee was inserted allowing for an outlet into an adjacent road ditch.
collector line was covered with a band of coarse sand to prolong
the life span of the drain system. Eight inches of Class 5 gravel
was compacted over the entire lot. Six inches of crushed granite
was used as the finish layer.
heavy fall rains nor rapid spring snow melts will present a problem
for this well-drained storage lot.