Drainage System Installation , North County San Diego

What a Site Assessment Tells Us

Before any drainage system is designed or installed, we assess the property to understand how water actually moves across it. The assessment answers the following questions:

Where is the water coming from roof runoff, surface runoff, subsurface seepage, or a combination? Where is the low point or collection area where does water naturally want to go? What is the soil composition clay soils retain water; sandy soils drain faster and how does this affect system design? What is the natural slope and grade is there enough fall to move water by gravity, or will additional grading be needed? Where can water be directed to a street, an easement, a dry well, or another approved outlet? Are there structures, foundations, or hardscape elements that need to be protected in the routing?

The answers to these questions determine which drainage systems are appropriate for the property and how they need to be sized and routed. A system designed without this information tends to underperform or to move water from one problem area to another.

Drainage Systems We Install

1. French Drain Systems:

   A French drain is a gravel-filled trench containing a perforated pipe, installed to collect subsurface water and redirect it along a controlled path. They are particularly effective for properties with clay soils, hillside and slope drainage, perimeter drainage around foundations, and yard areas that collect water at natural low points. Proper installation involves correct pipe sizing, appropriate gravel specification, filter fabric to prevent sediment infiltration, and sufficient outlet capacity.

2. Catch Basins:

   A catch basin is a surface-level drain grate connected to an underground pipe system that collects surface water at specific low points and moves it to an outlet. Multiple catch basins can be connected into a single drain line for efficient surface drainage across a larger area.

3. Channel & Trench Drains:

   Channel drains are linear drain systems — a narrow trench with a grated cover — used to intercept surface water flowing across a paved or hardscape area. Common locations: base of a driveway slope, along pool decks, across patios, and at transitions between hardscape and lawn.

4. Downspout Diversion Systems:

   A downspout diversion system connects your downspouts into underground drain lines that carry roof runoff away from the structure to an appropriate outlet. On a typical North County San Diego home, properly managed roof runoff represents a significant portion of the total water a drainage system must handle.

5. Grading & Flowline Correction:

   Grading correction involves reworking the surface slope of the yard so water flows by gravity toward appropriate collection or outlet points. Grading work is often combined with drain system installation to create a complete water management solution.

6. Dry Wells:

   Where a direct outlet to a street or easement is not available, a dry well allows collected water to percolate slowly into the soil rather than pooling on the surface. They are a common solution in North County San Diego properties where gravity drainage to a street outlet is not feasible.