Boise, Idaho · Irrigation & Yard Drainage
Water that reaches the roots and leaves the yard where it should
Altavera Construction designs and installs irrigation and yard drainage for Boise homeowners, from drip and rotor zones to French drains, catch basins, and regraded swales. Boise lots bring their own complications: canal water on the Bench, caliche under the valley floor, and loose decomposed granite on Foothills slopes. We plan where water arrives and where it exits before a trench is cut. This is outdoor drainage work, not basement waterproofing.
The Boise Water Problem
Boise yards rarely have one water problem; they usually have a supply question and a runoff question at the same time.
Irrigation in Boise starts with a question most cities never ask: where does your water come from? Many older lots on the Bench and in parts of Southeast Boise still draw from canals and laterals managed by an irrigation district, and some properties are still flood irrigated. Newer subdivisions in West and Southwest Boise usually run on pressurized irrigation. Either way the supply is seasonal, roughly spring to fall, so a system has to start cleanly, run efficiently through hot dry summers, and drain down before hard freezes. Canal water also carries sediment that a potable line never sees, which shapes filtration and head choices.
Below the surface, much of the valley floor sits on caliche, a cemented hardpan that water barely moves through. Overwatered lawns turn soggy, downspouts dump onto the same low spot every storm, and freeze-thaw heaves anything resting in saturated ground. Newer builds add compacted fill that sheds water toward patios and foundations when the final grade was rushed. In the North End, mature trees, narrow lots, and alley access complicate trenching, so drain lines and irrigation mains have to route around root zones instead of straight through them.
On the north and east edges, the Boise Foothills change the problem again. Homes in Harris Ranch, Barber Valley, Warm Springs, Hidden Springs, and Dry Creek Ranch sit on steep, sandy, decomposed-granite soils that erode fast when runoff concentrates. One misdirected downspout or a spray zone overshooting a slope can carve a gully in a single season. Many of these neighborhoods have HOA review for landscape changes, and wildfire exposure makes a well-watered zone near the house worth planning. Steeper grades sometimes pair drainage with retaining walls in Boise.
How Altavera handles it
Every Boise project starts by mapping the water: the supply source, the slope, where roof runoff lands, and where it can safely exit the lot. Drainage and grading are set first, then irrigation mains, valves, and sleeves go in, so hardscape and planting finish on ground that already handles water.
Above and Below the Grade
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Each zone is matched to what it waters. Drip feeds shrubs, perennials, and xeriscape beds at the root, spray heads cover tight lawn panels and narrow North End side yards, and rotors handle larger turf areas. Zones are split by sun exposure and plant type so a shady lawn is not drowned to keep a south-facing slope green through a Boise July.
Includes
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We connect new systems to pressurized irrigation or canal-fed supplies and pair them with smart controllers that adjust to weather. On district water, filtration and valve placement account for sediment. The goal is a system that starts up cleanly each spring, waters efficiently in peak heat, and drains down without fuss when the season ends.
Includes
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Where caliche or compacted fill keeps water sitting on the surface, we collect it and carry it away. French drains use perforated pipe in clean aggregate wrapped in filter fabric, and catch basins grab water at known low spots. Every line runs to a planned outlet, because a drain with nowhere to go just moves the puddle.
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Sometimes the fix is the shape of the ground itself. We regrade lots so water moves away from the house and cut shallow swales that guide runoff across the yard. On Foothills slopes, swales are lined or armored with rock to slow water down so sandy, decomposed-granite soil stays where it belongs.
Includes
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Patios, walkways, and driveways that pitch toward a wall or door get a channel drain set flush with the surface, tied into the same outlet plan as the rest of the yard.
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Roof water is often the largest single source on a Boise lot. We route downspouts into buried lines that discharge away from foundations, patios, and erodible slopes instead of onto them.
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Sleeves go in before concrete or pavers so future lines can pass underneath without demolition. Planning a paver patio in Boise? Sleeves belong in that scope.
Boise Yards We Fix
Older properties fed by laterals or flood irrigation often have aging lines, uneven coverage, and no real drainage plan. We assess the existing supply, decide what can be reused, and convert or rebuild the system so canal water is filtered, zoned, and delivered where plants actually need it.
Steep, sandy ground erodes quickly when water concentrates. These homeowners need downspouts buried and routed, swales that slow runoff, and drip irrigation that waters slopes without washing them out. Where an HOA reviews landscape changes, we plan the scope with that review in mind.
Builder-grade yards often come with compacted fill, a basic sprinkler layout, and grades that send water toward the patio. We correct the slope, add drains where the fill holds water, and expand or rezone the pressurized irrigation system for the landscape you actually want.
Historic homes on narrow lots deal with root zones, alleys, and downspouts that empty straight into side yards. We route drain lines and irrigation around established trees, work within limited access, and give older yards drip and spray zones sized for their real footprint.
Why One Team Matters Here
Irrigation and drainage work against each other when different companies install them. A sprinkler crew rarely thinks about outlets, and a drainage crew rarely thinks about zones.
Altavera handles both under one scope, which changes how the yard performs.
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Zones are laid out knowing where the drains are, so irrigation does not feed the same low spot the drainage is trying to empty. On caliche, that coordination is the difference between a lawn and a bog.
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Mains, valves, drain lines, and sleeves are installed and checked before patios, walls, or sod go down. Nothing gets trenched back open to fix a missed connection.
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Before we dig, we know where collected water will discharge on your property. That keeps runoff off a neighbor's lot, off the sidewalk, and off a fragile Foothills slope.
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You talk to one team about grading, drains, irrigation, and landscaping. When the system is tested at the end, the people who designed it are the people standing in the yard with you.
From Phone Call to Final Test
A free 15-minute call to hear what is happening: pooling, dry spots, erosion, a new yard, or a supply question about canal or pressurized water.
An estimator confirms the problem is outdoor drainage or irrigation we handle, and not a basement or foundation issue better suited to a specialist.
We walk the Boise property, trace slope and runoff paths, locate the water source and existing lines, and note soil conditions like caliche or loose decomposed granite.
You receive a written scope covering zones, drain routes, outlets, grading, and controller details, with the installation sequence spelled out.
A deposit locks your place on the schedule. Start dates are set once the proposal is signed, never before.
Grading and drainage go in first, irrigation mains, valves, and sleeves second, any hardscape third, and planting, sod, and finish work last.
We run every zone with you, check head coverage and drain flow, walk through the controller, and close out the punch list.
Where We Work in Boise
Altavera installs irrigation systems and yard drainage throughout Boise, including the North End, the Bench, Southeast Boise, West and Southwest Boise, Harris Ranch, Barber Valley, Warm Springs, and Foothills communities such as Hidden Springs and Dry Creek Ranch. We also serve Garden City, Meridian, Eagle, Star, Kuna, Nampa, and the wider Treasure Valley across Ada, Canyon, and Gem counties.
If your irrigation or drainage scope requires a permit, Altavera pulls it and manages the process with the City of Boise's permitting office, or with Ada County when the lot is unincorporated.
Finishing the yard after the water is solved? See landscaping and sod in Boise, or compare irrigation and drainage in Meridian and irrigation and drainage in Eagle.
FAQ
Yes, in most cases. Many Bench and Southeast Boise lots receive seasonal water through canals and laterals, and we design systems around that supply. Canal water carries sediment, so filtration, valve placement, and head selection are planned for it. If a property is currently flood irrigated, we look at whether converting to zoned delivery makes sense and how it fits your irrigation district's rules for the lot.
Usually because caliche or compacted fill below the topsoil keeps water from soaking in. On much of the Boise valley floor, that hardpan layer acts like a shallow floor, so water spreads sideways and pools. The fix is often a combination of regrading, French drains or catch basins at low points, and rezoning irrigation so it stops overwatering the same area.
We slow water down and route it deliberately. Sandy, decomposed-granite soils along the Boise Foothills erode fast when runoff concentrates, so we bury downspout lines, shape rock-lined swales, and use drip irrigation on slopes instead of spray that runs off. Outlets are placed where discharge will not undercut a slope or send water onto a neighboring lot.
It depends on your neighborhood and the scope. Planned communities like Harris Ranch often review landscape and grading changes, so we plan the scope with that review in mind. When the work requires a permit, Altavera pulls it and manages it with the City of Boise's permitting office, or Ada County for unincorporated lots.
Often, yes, as long as the ground is workable. Trenching, mains, valves, sleeves, and drainage do not need water in the lines, so much of the underground can be built while Boise's irrigation supply is shut off. Final testing and head adjustment need the water running, so that step follows when the supply returns. Spring and summer book quickly, so planning ahead helps.
No. Altavera handles yard and outdoor drainage: grading, swales, French drains in the landscape, catch basins, channel drains, and downspout routing. Interior waterproofing, crawlspace systems, and foundation repair belong with a basement or foundation specialist. If water reaches the house because of poor exterior grade or roof runoff dumping against the wall, that outdoor piece is something we can address as part of a yard project.
It depends entirely on what the yard needs, so there is no honest number before a site visit. Zone count, the water source, trench length, soil conditions, slope, and whether drainage has to be corrected first all shape the scope. After the on-site estimate you receive a written proposal covering the full scope. Third-party financing options are available.
Start Your Boise Project
Request a quote and tell us where water pools, runs off, or never reaches. We will walk your Boise property, trace the slope, the supply, and the roof runoff, and hand you a written scope before a single trench is opened.
Prefer to talk? Call 208-314-9967 or try our instant quote.
Licensed & Insured · Idaho Contractor License #6971895 · Serving Boise & the Treasure Valley
We elevate outdoor spaces with professional planning, expert execution, and quality craftsmanship — because your outdoor space is an extension of your home, not an afterthought.
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