The British pint is about 20% larger than the American pint since the two systems are not compatible. Almost all other countries have standardized on the metric system, so the size of what may be called a pint varies depending on local custom.
It is usually measured by the depth (in mm) of the water layer that can enter the soil in one hour. An infiltration rate of 15 mm/hour means that a water layer of 15 mm on the soil surface, will take one hour to infiltrate. In dry soil, water infiltrates rapidly.
Then a base material will need to be trucked in and graded to create your drainage slopes. The cost of this operation will be substantial. If you re-pave it with concrete, plan on about $4.00 per square foot. Asphalt will cost you about $2.00 per square foot.hen a base material will need to be trucked in and graded to create your drainage slopes. The cost of this operation will be substantial. If you re-pave it with concrete, plan on about $4.00 per square foot. Asphalt will cost you about $2.00 per square foot.