Service Area · South Park high country
Senior-led septic, excavation, driveways, water storage, and custom building across Park County — South Park high country at 8,500–10,000 ft — with the hard mountain site work handled in-house.
We do more than dig a hole and drop in a tank.
Tri-Lakes Contracting is a licensed septic installer, excavation contractor, and custom home builder working throughout Park County. Site work and septic permitting are the critical first steps before you can even break ground on a build — and they’re exactly what we handle, start to finish.
Because we hold the septic, driveway, and building sides in-house, we bundle them into one path instead of stitching together three separate contractors: soil testing and engineered design, excavation and grading, the septic system, water storage, and the home itself — one crew, one point of contact, on your schedule.
We know Park County terrain inside and out — high-altitude open park, shallow bedrock, and short frost-free seasons. Whether your property is in Fairplay, Bailey, Hartsel and Guffey, we deliver site work built for South Park high country conditions and permitted under Park County Public Health / Environmental Health and Colorado’s Regulation 43.
What we handle in Park County
We excavate profile test pits, work with licensed engineers on the soils report and site plan, and lay out the drain field, tank, and setbacks — the design your Park County Public Health / Environmental Health permit stands on.
Full onsite wastewater systems — conventional, pressure-dosed, and advanced-treatment — installed for South Park high country ground and Park County Public Health / Environmental Health review.
Access, building pad, utilities, and all-weather driveways cut for Park County — high-altitude open park, shallow bedrock, and short frost-free seasons.
Buried cisterns and fire-suppression storage for lots without a reliable well, or where the county requires stored water on site.
From a build-ready design or your own plans, we take a raw Park County lot through to a finished, permitted home.
Before you buy or build, a clear read on what the lot can support — soil, slope, setbacks, water, and the permit path.
Local details by service
Gravel construction, repairs, swales and culverts in Park County →
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What we don’t do
We don’t design or stamp septic systems ourselves — that work is always completed by a licensed engineer. But we work closely with our engineering partners so you receive a complete, permit-ready package that passes Park County Public Health / Environmental Health review the first time, without the back-and-forth that stalls a Park County build.
Already have engineered septic or OWTS plans? Upload the PDF for an instant Colorado installation estimate, then have Tri-Lakes, a licensed Colorado OWTS installer, price and build the system.
Where we work in Park County
We serve Fairplay, Bailey, Hartsel, Guffey and Lake George and the surrounding South Park high country high country, out from Fairplay. At 8,500–10,000 ft, Park County brings high-altitude open park, shallow bedrock, and short frost-free seasons — conditions our crews work in every week, not once a season.
Park County — questions
Yes. We excavate the soil test pits, coordinate the engineered design with a licensed engineer, and hand you a permit-ready package for Park County Public Health / Environmental Health under Colorado Regulation 43. On South Park high country ground — high-altitude open park, shallow bedrock, and short frost-free seasons — that soil evaluation is what the whole system is designed from.
That’s our model. Because we hold the septic, excavation, and building sides in-house, we sequence them into one path — soil test, design, driveway, septic, water, and the home — instead of you chasing three contractors across Park County.
Fairplay, Bailey, Hartsel, Guffey and Lake George and the surrounding high country, out from Fairplay. If your lot is raw South Park high country ground, that’s exactly the work we’re built for.
We don’t design or stamp septic systems ourselves — that’s always done by a licensed engineer. We work hand-in-hand with our engineering partners so your package passes Park County Public Health / Environmental Health review the first time.
Tell us about the lot and we'll map the whole path — feasibility, design, permit, and build.
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