Meningitis is a term used to describe inflammation of the membranes that surround the brain and spinal cord. Usually, the inflammation is caused by a viral or bacterial infection. Meningitis can be very serious, even life threatening, but it can also sometimes resolve on its own after a few weeks. History of Meningitis.The origins of what we now know as meningitis is not known.It seems Hippocrates was aware of the existence of swelling of the membranes around the spinal cord and brain.eningitis can be very serious, even life threatening, but it can also sometimes resolve on its own after a few weeks. History of Meningitis. The origins of what we now know as meningitis is not known. It seems Hippocrates was aware of the existence of swelling of the membranes around the spinal cord and brain.
So if you are paving a driveway with 2 1/2-inch thick bricks, you need to dig a level hole that is 8 1/2 inches deep.. For vehicular traffic, excavate 9 to 11 inches deep to allow for base material and 6 to 8 inches of gravel.. ...need to excavate 12+ inches deep for driveway that parks cars (7 inches deep for walkway).  We typically dig a 12â base under patioâs and walkways, and then 18â-24â deep for driveways in Ottawa.The weight of a car will destroy any interlock with an insufficient base installation and you will be doing the levelling again in 2-3 years.. have received four different suggestions about how deep that I need to excavate, as follows: Driveways should be at least 6 inches deeper than the thickness of your brick.
At that approximate cost, a driveway contractor will dig out 4-6 inches of whatever you already have in place, replace it with clean driveway gravel and grade it to a level and compacted surface. After that, they will put down 3-4 inches of base asphalt, and a final coating of 1-2 inches of topcoat.* Note that the any asphalt driveway cost calculators you use online are only going to be rough estimates. The only way to get an accurate cost quote, is to get quotes from local contractors.n fact, most driveway contractors can come in, clean the old surface and chip away at the edges to make sure you get good adhesion of the new topcoat, roll on a new surface and be gone in less than 1 day! The cost, is even more attractive at just $1.65 â $2.40 dollars per square foot.