Drainage & Grading · Kanata, ON
French drains and yard drainage in Kanata
French drains, regrading and clear-stone work for Kanata yards that stay wet. Groundwater here rises and falls with the seasons, so we trace the water first and choose where it can leave before anything is dug.
- Clear stone
- Filter fabric
- Perforated pipe
- Dimpled membrane
The local picture
Drainage & Grading in Kanata
A City of Ottawa study near Terry Fox Drive and the Carp River estimated groundwater at about 2 to 3 m down, rising and falling with the seasons. Low yards need a clear plan for where surface water goes: a slope that sends it away from the house, and a shallow French drain where water keeps collecting in the same spot.
The South March Highlands to the north are designated as a natural environment area with significant wetlands. Yards near protected land keep runoff and fill on the owner’s side, so the drain outlet is chosen on your lot. Water is never sent onto a neighbour’s property.
Two watersheds under one suburb
Carp River to the west, Monahan Drain in Kanata South
Korvex Construction builds shallow French drains, regrades wet lawns and lays clear stone along foundations across Kanata, from Beaverbrook and Glen Cairn to Bridlewood, Morgan’s Grant and Kanata Lakes. Book a free on-site estimate online or call 613-880-7679: we walk the yard, trace the water to its source and send a written quote after the visit.
Kanata drains in two directions. The Carp River, which runs through its western part, falls under the Mississippi Valley Conservation Authority. The authority names the Carp as one of its highest flood risk areas and is updating floodplain maps drawn in 1983, because land use in the upper watershed in Kanata has changed so much. In Kanata South, the Rideau Valley Conservation Authority lists the Monahan Drain among its active hazard mapping projects.
For a backyard drain, this matters at the outlet. Which authority’s map applies depends on which side of Kanata the lot is on, and a yard that backs onto a creek corridor, a drain or a stormwater pond needs its outlet chosen with that map in hand. We check it before planning where the water goes.
Before the estimate: watch the next storm
Notes and photos that sharpen the quote
The most useful thing you can bring to the site visit is a record of where the water goes. Take photos during or right after a heavy rain and again the next day. City guidance treats water still standing on a lawn after 48 hours as a reason to call 3-1-1, so note how long each puddle lasts.
- Where the water pools, and whether it is the same spot every time.
- Which downspout, driveway or neighbour’s slope feeds it.
- Whether it turns to ice on a walkway or the driveway in winter.
- Whether a spot stays wet through spring and dries out in summer, which can point to groundwater rather than roof water.
Why spring tells the most
The City’s Spring Flood Taskforce notes that flows in the Rideau River and local waterways usually rise from mid-March to mid-April, and that spring melt combined with heavy rain can cause water pooling. A Kanata yard that only floods in April is often reacting to that season: frozen ground, melting snowbanks and a higher water table at once. A yard that floods after every summer storm points more often to a slope or downspout problem. The two get different fixes, so tell us when your wet spot appears.
At the site visit
What we check on a lot in Kanata
- 01
Which conservation authority’s map covers the lot: Mississippi Valley on the Carp side, Rideau Valley in Kanata South.
- 02
Whether rock shows near the surface along a trench route, since Kanata ground can change from clay to rock on one site.
- 03
The swales along the rear and side lot lines, and any backyard catch basin.
- 04
How your yard sits against the neighbours’: who drains onto whom.
- 05
Hedges and mature trees along the drain line on the older streets.
- 06
An outlet on your own side of the lot line, with enough fall to reach it.
What we plan around
Local conditions in Kanata
Each point links to the public source it was checked against. At the site visit we check how it applies to your lot.
- Groundwater near the Carp River
The same study estimated groundwater at about 2 to 3 m down, rising and falling with the seasons. Low yards need a clear plan for where surface water goes.
- Protected land to the north
The South March Highlands are designated as a natural environment area with significant wetlands. Yards near protected land keep runoff and fill on the owner’s side.
How we build it
How a drainage fix is built
Every lot drains differently. The drawing shows the parts most of our drainage jobs use.
- Find the source
Roof water, runoff, a neighbour’s slope or a high water table: each needs its own fix.
- Outlet first
Chosen before digging. A drain with nowhere to discharge only moves the puddle.
- Protect the foundation
A dimpled membrane under the stone can steer water away from the wall.
- Grade the surface
Finished ground slopes away from the house, toward the drain.
- Clear-stone surfaceOpen stone over the membrane, so water gets off the surface fast and is carried away from the wall.Open and free-draining
- Filter fabricKeeps soil from washing into the stone and clogging it over time.Laid over the soil
- Perforated pipe, where neededCollects water in the trench and carries it to the planned outlet.Laid to fall
- Stone beddingSurrounds the pipe so water can reach it from all sides.Levelled across the area
- Graded native soilTrench bottom shaped to fall steadily toward the outlet.To firm ground
Projects
Drainage and grading we have built
Recent jobs from across Ottawa.
“Vlad and his coworkers are very hard working and professional with a realistic and fair pricing that cant beat any other company out there ! We just had a major leak in our basement and they efficiently waterproofed the foundation and created a french drain with outstanding finish of layering gravel and pavement reconstruction. They are the people to call for almost any kind of work on your house !! Thank you guys God Bless & Respekt!”
Gio Ivana Herrera · French drain after a basement leak
FAQ
Drainage & Grading in Kanata: common questions
Our yard backs onto the Carp River corridor. Does that change the drainage plan?
It can. The Mississippi Valley Conservation Authority lists the Carp River as one of its highest flood risk areas, with considerable flooding in 1998, 1999, 2005, 2008, 2009, 2014, 2017 and 2019. Grading and fill near the river can fall under the authority’s rules, so we check the lot against its mapping before planning the outlet, and the collected water stays on your property.
Can a French drain go in where there is rock?
Often, yes, with a route planned for it. Rock limits how deep a trench can go, so the line is set to keep a steady fall above the rock, or the fix leans more on regrading the surface. Kanata ground can change from deep clay to rock on the same site. We look at the route at the site visit, and if rock turns up during digging, we tell you before the plan changes.
The same corner of our yard floods every spring. What can be done?
A spot like that sits lower than the ground around it, takes water from a neighbour’s slope or a downspout, or both. We look at where the water comes from, then choose between regrading the low spot, a shallow French drain that carries the water to an outlet, or both.
Do you work in all parts of Kanata?
Yes. Korvex Construction builds decks, fences, interlock and drainage across Kanata, including Beaverbrook, Glen Cairn, Bridlewood, Morgan’s Grant and Kanata Lakes. The ground changes from yard to yard here, so the free on-site estimate starts with what is under your lawn. Request an estimate online or call 613-880-7679.
Why does my yard stay wet long after rain?
Much of Ottawa sits on clay, which drains slowly, so water that has nowhere to run stays near the surface. The usual causes are a low spot, a yard that has lost its slope, water arriving from a neighbour’s higher lot, or downspouts emptying onto the lawn. We walk the yard, ideally after a rain, find which of these it is, and fix that: regrading, a French drain to an outlet, or both.
Book a free drainage estimate in Kanata
Tell us what you want built and send a few photos. We come out, look at what sits under the job, and give you the scope and the price in writing.