Serving Highland
Groundwater & Basement Water Intrusion in Highland, CA
Basement seepage, failed sumps, and hydrostatic pressure against the foundation are extracted and dried, and the path from the ground is identified so the loss does not repeat. Groundwater and basement seepage are extracted and dried only after the path from the soil is identified — a wall, a slab, a drain, or a failed sump. Drying the interior without stopping that path returns the same water to the same floor.
Frequently asked questions
There are basins and levees between the mountains and the houses.
There are, built after the floods that shaped this area, and they work by catching rock and soil so that what continues downstream is water rather than debris. Their capacity is finite and it is used up gradually. A basin that has not been cleared since the last event is not offering what it was designed to offer.
The wash on the edge of the city is a wide bed of sand.
And it is a floodway rather than open land, whatever it looks like in August. A channel like that carries an enormous flow when the mountain front sheds one, and because the bed is loose it shifts within its banks between events. The mapping treats it as a river because that is what it is.
There is cobble a couple of feet down across the whole lot.
Which changes what any drainage work costs, because a trench through rock and cobble is a different job from a trench through soil. It also means water moves through that layer readily once it reaches it. The practical answer here is surface work: shaping the ground and piping roof water well clear rather than digging deep.
These questions come from the Highland page.