French Drain Gravel for Ontario California
Material picks, pricing, and pro tips for french drain gravel projects in Ontario, CA.
French drain gravel systems for Ontario California
Ontario sits at 3,000 feet elevation in inland San Bernardino County, where summer monsoons and winter rains create competing water pressures. Unlike coastal California cities that receive steady moisture, Ontario experiences boom-and-bust patterns: months of dry heat followed by intense downpours that overwhelm shallow soil infiltration. Properties collect water in low-lying corners and around foundations.
The area's sandy and compacted soils shed water instead of absorbing it. When monsoon storms hit, runoff channels form on grades and collect at structures. A French drain gravel system intercepts this water before it pools against your foundation or kills your landscape.
Choosing stone size and material type for Ontario soils
#57 Crushed Stone is the standard for drains because of its specific size range, 1/2 to 3/4 inch, and its angular shape. The crisp, jagged faces lock together and resist the compaction that happens when water weight presses down or as soil settles over time. Ontario's adobe and sandy clay soils are particularly prone to settling, so angular stone that maintains its structure is essential.
Smooth river gravel of the same size may look comparable but does not perform the same way. In Ontario's dry season, fine dust and soil particles from the surrounding area can sift into voids between round stones, choking the drain. Crushed stone's faceted design keeps sediment out and water flowing.
Sizing your order and using our calculator
Determine how much crushed stone you need by measuring your trench in feet and inches. Take length in feet, width in feet, and depth in inches, then divide by 324 to get cubic yards. Since #57 is sold by the ton, one ton spreads roughly 80 to 100 square feet at a 2-inch depth.
Most Ontario property drains require 1 to 3 tons. Use the calculator to enter your dimensions and get an exact tonnage, then request delivery in Ontario to see pricing by order size. Deliveries are free for orders of 15 tons or more.
Ontario's seasonal water patterns and drainage design
Spring and summer monsoons in Ontario are typically brief but heavy. Digging and backfilling should happen during the dry season, roughly April through July, when your property is not waterlogged. If you are installing a drain in the winter wet season, work during the driest window available.
Ontario's elevation and low humidity speed soil drying once the drain is installed. Most systems settle and establish proper flow within two to three weeks. If water still collects after the first heavy rain, check that your outlet ditch is lower than the drain or clear any debris that may be blocking the exit.
Getting crushed stone delivered and installed
We deliver #57 Crushed Stone by the ton to Ontario and surrounding areas in San Bernardino and Riverside counties. Use your ZIP code on our site to see pricing and delivery windows. Once stone arrives, most homeowners and contractors finish a complete French drain installation in a single day of work.
#57 Crushed Stone is ideal for drainage in Ontario's climate. Its durability and cost-effectiveness make it the choice for residential and commercial projects across the high desert.
About French Drain Gravel projects
A French drain system combines perforated pipe with gravel to move water away from building foundations and landscaping. Water enters through coarse, angular stone, flows along the pipe, and exits at a downhill outlet. The stone you choose determines how long the system works and how effectively it routes water. Angular crushed stone resists compaction and maintains water pathways, while fine sediment from surrounding soil can block smooth stones and reduce flow. Proper drainage protects your property from foundation settling, basement seepage, and landscaping loss.
Recommended materials for french drain gravel
How a french drain gravel project goes
- Mark and excavate your drainage trenchTrace a path from the wet area downhill to your outlet. Dig a trench at least 12 inches deep and 6 inches wide. The trench must drop at minimum 1/8 inch per foot toward the outlet. This slight slope is critical in Ontario's flat terrain; measure it with a level and string.
- Line the trench and place the drain pipeLay landscape fabric at the bottom to keep fine desert soils out of the gravel layer. Position perforated pipe in the trench, sloping downhill. Proper slope and pipe position are essential in Ontario's sandy, compacting soils.
- Cover pipe with crushed stoneAdd 2 to 4 inches of #57 Crushed Stone over the pipe. The angular faces lock together and form stable flow channels that resist the compaction forces of Ontario's seasonal water runoff. Water flows into the stone and down to the pipe perforations.
- Cap the gravel with landscape fabricFold the initial layer of fabric over the top of the crushed stone. This cap prevents topsoil from mixing into the gravel and reducing its drainage capacity. Secure the fabric at the edges so settling does not expose the stone.
- Backfill and test the systemFill the trench with topsoil and compact lightly. Use a hose to flood the area above the drain and observe water flow. Adjust soil grade if water pools. The drain should begin working within a few days of installation.
Estimate your material
Work out your material
A planning figure, not a guarantee. Order roughly a tenth extra to cover settling and uneven ground.
French drain gravel in Ontario's climate
What works in Ontario starts with how California weathers a year. Long dry spells with brief heavy rain. Erosion control on slopes is more critical than freeze resistance. For french drain gravel work specifically, that means choosing material that handles local moisture and traffic loads without re-dressing every season.
The small market profile of Ontario also shapes how a project runs. Most jobs are residential, with the occasional school or municipal project. Truck access is usually wide and turnarounds run fast.
Where we deliver french drain gravel material in Ontario
Our delivery footprint around Ontario covers the core city plus a typical 35-mile radius. Recent french drain gravel drops have included:
- older single-family blocks in and around Ontario
- newer subdivisions on the outskirts in and around Ontario
- commercial pad sites near the freeway in and around Ontario
- horse properties on the rural edge in and around Ontario
If your address is outside that radius, send your ZIP through the contact form and we will confirm coverage within an hour.
Pricing for french drain gravel in Ontario
Here is what the recommended french drain gravel materials are running in Ontario right now. Full-truck orders (16 tons or more) typically save 15 to 20 percent off these per-ton rates.
| Material | Price from |
|---|---|
| #57 Crushed Stone Delivery in Ontario, CA | Quote on request |
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GUIDEWhat Is Crushed Stone? Sizes, Uses and Buying BasicsCrushed stone is quarried rock crushed and screened into angular pieces sold by the ton. Here is what it is, how it is graded, and where to use it.Read guide →
GUIDEHow Much Does Gravel Cost? A Practical Pricing GuideHow much does gravel cost and why does it vary? See the real factors behind ton pricing, delivery, and order size before you buy.Read guide →GUIDEGravel Size Chart: Pea Gravel to Crushed StoneA gravel size chart showing pea gravel, crushed stone and river rock diameters side by side, so you can match the right size to your project.Read guide →Frequently Asked Questions
Why does Ontario get flooding problems in summer when it is usually dry?
Ontario sits in a monsoon zone. Summer thunderstorms arrive suddenly and dump heavy rain in minutes. Soils that are baked hard from months of dry heat cannot absorb water that fast, so runoff collects. A French drain channels this intense runoff before it damages your property.
Can I install a French drain in Ontario's winter?
Winter is wetter, but the soil is often workable. Spring and early summer are ideal because soil is drier and easier to dig. If you must work in winter, choose the driest week available and allow extra drying time before heavy rains return.
How much crushed stone will a typical Ontario drain need?
Residential drains typically use 1 to 3 tons. A single-family lot with moderate drainage needs usually requires 2 tons. Use the calculator to enter your trench dimensions and get an accurate tonnage for your project.
Is #57 Crushed Stone better than other gravel sizes?
Yes, for drainage. #57 is sized to balance water flow with particle filtration. Smaller stone clogs; larger stone allows soil particles to pass through. #57 is the industry standard for this reason.
What if water still backs up after my drain is installed?
The outlet may be higher than the drain exit, the pipe may be blocked with debris, or the slope may be shallower than required. Check outlet elevation, clear the pipe, and verify your slope with a level. Install a sump pump if the outlet cannot go lower.
How long will my French drain system last?
A well-built system using crushed stone and landscape fabric typically lasts 10 to 15 years. Ontario's dry climate is gentler on materials than wet coastal areas. Inspect after heavy storms and clear the outlet if water backs up.
Can I use desert sand instead of crushed stone?
No. Desert sand, whether native or delivered, will compact and clog once water pressure increases. Crushed stone resists compaction and maintains flow. In Ontario's dry climate, sand dries like concrete and becomes impermeable.
Do I need a permit to install a French drain in Ontario?
Check with the San Bernardino County or local Ontario city building department. Most property drains are permitted as routine work. Your contractor can verify requirements before you start digging.