Doing the Math on Teacher Pensions: How to Protect. Teachers and Taxpayers. Do the math on teacher pensions and it just doesnât add up. In 2014 teacher pension systems had a total of a half trillion. dollars in unfunded liabilities â a debt load that climbed more than $100 billion in just the last two years. Across the.
1 These prices can double for a roadway-quality driveway (geotextile fabric covered with three layers of compacted gravel, each about 3-4 thick), or $450 -$1,800 for 12'x25' and $11,000 -$60,000 or more for a driveway 12' wide and a quarter-mile long. A cubic yard of driveway-grade crushed gravel costs about $10 -$60 or more, depending on whether it is picked up by the customer at the gravel yard or delivered to the job site, and the size and type of gravel used.
1 (A cubic yard of gravel is 3'x3'x3' and weighs roughly 1.2 to 1.7 tons or more). 2  A 12'x25' single-car driveway 9 thick requires an estimated 10-14 tons, which can cost $100 -$850. 3  A 14'x100' driveway 6 thick requires about 26 tons of gravel, or $260 -$1,560 for just the stones. A cubic yard of driveway-grade crushed gravel costs about $10 -$60 or more, depending on whether it is picked up by the customer at the gravel yard or delivered to the job site, and the size and type of gravel used.