The ground here
In Lehigh, the septic decides how high the pad goes.
Lehigh Acres is around 152,000 platted lots laid out on a grid of canals and swales, and most of it has no central sewer. That single fact drives the grading. A drainfield has to sit a required distance above the seasonal high water table, and on ground this flat and this wet the only way to get there is to bring the pad up.
So the sequence runs backwards from the septic. The drainfield elevation sets the pad elevation, the pad elevation sets the fill volume, and the fill volume is most of the price. A lot that needs a foot of fill and a lot that needs three feet are the same size and completely different jobs.
Then the water has to leave. The grid of swales is the drainage system, and a finished lot has to shed into it rather than hold water against a fresh pad. Getting the pad high enough and forgetting the fall around it is the most common way a Lehigh lot ends up regraded twice.
- Septic and drainfield elevation
- The number the whole job is built from. It sets how high the pad has to be, and therefore how much material has to arrive.
- Seasonal high water table
- It is what the required separation is measured against, and it moves with the season. It is the reason two neighbouring lots can need very different amounts of fill.
- Fill volume and trucking
- Most Lehigh pads are built up rather than cut down, so the volume is imported. Trucking is a real share of the cost and belongs on its own line.
- The swale grid
- Lehigh drains through swales. The finished grade has to shed into one, and the tie-in is part of the grading, not an afterthought.
- Driveway length and fall
- A long drive across flat ground needs crown and fall built into it, or it becomes the lowest point on the property the first time it rains hard.