Concrete V-Ditch & Brow Ditch Contractor

Precision Set-Up Concrete has completed hundreds of V-ditch projects across Riverside and San Diego counties — residential hillside drainage, graded-lot drainage, and commercial site work. If water is coming downhill toward your structure, this is the concrete that decides where it goes instead.

(800) 294-2207 · info@psuconcrete.com · Request a free estimate Primary V-ditch site: Vditch.com (Google primary). This page supports that property — more detail and specialty content live at vditch.com.

What is a V-ditch?

A V-ditch is a concrete drainage channel with a V-shaped or shallow trapezoidal cross-section, formed and poured in place to collect surface runoff and carry it to a controlled outlet — a street, a storm drain, a natural drainage course, or an energy dissipator at the bottom of a slope.

The V shape does a specific job: it concentrates low flows into the bottom of the channel so the water keeps moving instead of spreading out, slowing down, and soaking in where it should not. Concrete does the other half of the job — it resists erosion at velocities that would carve a dirt swale into a gully in a single wet season.

V-ditch vs. brow ditch vs. swale

The terms get used loosely on job sites. In general use around Southern California grading work:

• V-ditch — the general term for the V-shaped concrete channel, used anywhere on a site.
• Brow ditch — a V-ditch placed at the top (“brow”) of a slope or cut bank, to intercept runoff from above before it ever reaches the slope face. Interception is the whole point: water that never gets onto the slope cannot erode it.
• Terrace or bench drain — a channel partway down a long slope, catching runoff at an intermediate bench.
• Swale — usually an earthen or landscaped depression rather than a concrete channel. Swales handle gentle flows; where the volume or the grade is beyond what soil can take, the plan calls for concrete.

What your project needs is determined by the grading and drainage plan your civil engineer prepared, and by what the building or grading department approved.

When your site needs a concrete ditch

Common situations, all of them ordinary in hillside and rural Southern California construction:

• A graded pad cut into a slope, where the cut bank above will shed water toward the new structure.
• A new home or ADU on a sloped lot, where the grading plan has to move surface water around the building instead of into it.
• A long driveway on grade, which behaves like a channel in a storm whether or not anyone designed it that way.
• Slope faces above a structure, where uncontrolled runoff means erosion, sediment, and eventually undermined landscaping or hardscape.
• A grading permit condition requiring permanent drainage improvements before final sign-off.
• An existing dirt swale that keeps failing — silting in, eroding, and needing a scraper every winter.

Seasonal rain in inland Southern California arrives in concentrated bursts, and a slope that looks harmless in August moves a lot of water in a February storm. Drainage is the cheapest part of the job to build correctly and the most expensive thing on a property to fix after the fact.

V-ditch work we do

Residential hillside drainage

Brow ditches above cut slopes, side-yard channels, terrace drains, and outlets — built for homes on grade in areas like La Cresta, Tenaja, Temecula Wine Country, Fallbrook, Bonsall, Valley Center, and Rancho Santa Fe.

Graded lot and pad drainage

Drainage improvements that go in with a new pad: perimeter channels, pad drainage to an approved outlet, and the ditches that a grading plan requires as a condition of the permit. Poured with the foundation work when the schedule allows, so the site is not re-mobilized twice.

Commercial and agricultural sites

Site drainage for small to medium commercial projects, plus agricultural and equestrian properties — groves, vineyards, arenas, and barn areas where runoff has to be routed away from working surfaces and structures.

Repair and replacement

Cracked, spalled, undermined, or silted-in channels; sections that have separated or shifted; outlets that have eroded. Sometimes the fix is a section replacement, sometimes it is rebuilding a ditch that was under-sized from the start.

How we build a V-ditch

1. Review the grading and drainage plan — alignment, cross-section, flow line elevations, and where the water is supposed to end up.
2. Layout and excavation — the channel is cut to line and grade, which matters more here than almost anywhere else in concrete work. A flow line with a low spot is a ditch that holds water and silt.
3. Sub-grade preparation — compacted, uniform bearing under the entire channel, so the ditch does not settle out of grade in the first year.
4. Forming — forms set to the specified cross-section and alignment, including radii on curves.
5. Reinforcement where specified — welded wire, rebar, or fiber per the plan and the jurisdiction’s standard detail.
6. Pour and finish — placed, consolidated, and finished to a surface that moves water rather than catching it.
7. Joints — weakened plane and construction joints located so the channel cracks where it is supposed to.
8. Outlet and transitions — connections to the street, storm drain, existing channel, or energy dissipator, so the water leaves the site the way the plan says it does.
9. Inspection — coordinated with the grading or building inspection for the project.

Built to the civil plan

V-ditch work is engineered work. Cross-section, slope, capacity, alignment, and outlet are determined by the civil engineer and reviewed by the jurisdiction — Riverside County, San Diego County, or a city building or public works department such as the City of Murrieta or the City of Temecula. We build to that approved plan and standard detail.

If something on the plan will not build in the field as drawn — a flow line that cannot hold grade, an alignment that conflicts with a structure or a utility — we flag it before we form, so the engineer can address it rather than the crew improvising.

Maintenance: the part everybody skips

Concrete ditches are low-maintenance, not no-maintenance. Before each wet season, clear the channel and the outlet of leaves, sediment, and debris, look for cracks or separated joints, and check that the outlet is still discharging where it was designed to. A brow ditch full of silt is doing about as much for you as no brow ditch at all — and the failure shows up during the exact storm you needed it for.

V-ditch FAQ

Do I need a permit for a V-ditch, and who pulls it? Drainage improvements are typically part of a grading permit or a building permit, and requirements vary by jurisdiction. The owner or general contractor pulls the permit; Precision Set-Up Concrete never pulls permits and is never listed on the permit. We build to the permitted plans. Your civil engineer and your local building or public works department will tell you what applies to your parcel. See our guides to Riverside County building permits and San Diego County building permits.

Do you design the drainage, or just build it? We build to the approved civil/grading plan. Drainage design is the engineer’s work. We do not publish a public referral list or name engineers on this page. If you do not yet have a plan, hire a licensed civil engineer through your own channels; then send us the approved drawings and we will bid the concrete drainage scope.

Can you do V-ditch work without a full foundation job? Yes — V-ditch and drainage work is its own scope and does not have to be attached to a foundation contract.

How long does a V-ditch take to build? It depends on length, access, cross-section, and how much excavation is involved. We give a schedule with the bid rather than a generic number.

Do you handle the grading too? Our scope is the concrete drainage work built to the approved civil and grading plan. We do not claim to self-perform grading; where earthwork is needed, define whose scope it is in writing before the job starts.

Get a V-ditch estimate

Send us the grading plan, or tell us what the water is doing, and we will bid the scope required to build it. Change orders only if you change the work or the grade does not match the plan.

Call (800) 294-2207 · info@psuconcrete.com · Monday–Friday, 7:00 a.m.–5:00 p.m. Request a Free Bid · Primary V-ditch site: Vditch.com Precision Set-Up Concrete · (800) 294-2207 · psuconcrete.com · CA License #963015 (C-8)

Learn more: What is a V-ditch?