
This
project wanted to build a home on a very steep (2:1) downslope lot.
Inital SWAGs put about $200k into retaining walls and excavation alone,
so they hired me to get a little better handle on the concept. Good
idea. I first took the plat and entered all of the setbacks (front,
side, rear, sewer, road, drains) and lot dimensions to scale using the
angles on the survey. Next I entered the topographic survey as a 3D
mesh, which ranged from 900 to 950 ft above sea level. Now we could
begin our virtual building; working with the builder we put the garage
as close and as high as possible to the road, but close meant a shorter
driveway and thus a steeper slope. Further back gave more driveway but
put the house close to the rear setbacks and further down from the
road. Working with my toolset, we were able to accurately place
sub-basements, the house, and the garage at elevation with a 3D
driveway. Once the driveway was placed with all the subbasements, we
could then place retaining walls and accurately estimate how much dirt
had to be moved (720 cu yd, if you're curious). We then were able to
locate places to put that dirt to minimize hauling and save $50,000 on
escavating, and were able to have a scientific plan to present to the
county in obtaining the land disturbance permit. Got a tricky building
project? Let me help you!

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