DURANGO, Colo. - ColoradoDesk -- Animas Excavating, a licensed and insured General Excavation Contractor based in Durango, has launched a new page dedicated to septic system installation in Southwest Colorado. Septic system installation is how rural and semi-rural properties handle wastewater where there's no municipal sewer line. Here, municipal sewer reaches only part of La Plata County, so many property owners need one.

The page outlines full-service onsite wastewater treatment system (OWTS) installation for new home construction, system replacements, and commercial sites.

Much of La Plata County sits on rocky substrate close to the surface, and shallow bedrock can stop a trench before it reaches the depth an approved design calls for. Steep slopes limit which systems a site can support, and high water tables in some valleys leave little margin for error. The company's experienced team has worked across that terrain, from sloped rural parcels to tight commercial lots.

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No single system fits every property. Each install starts on ground readied through the company's site preparation work, and the page breaks down five system types by the conditions they suit.

• Conventional gravity systems for sites with good soil absorption and manageable slope
• Chamber systems that use plastic arch units in place of a gravel drainfield
• Mound systems that raise the drainfield where bedrock is shallow or water tables are high
• Aerobic treatment units that add active aeration for a higher treatment standard
• Drip dispersal systems for steep slopes or limited drainfield space

The page also covers Colorado Regulation 43 and La Plata County permitting, including the county's local OWTS regulations that took effect March 2, 2026. It walks through the company's seven-step installation process, from site evaluation and soil analysis coordination to final inspection support. A licensed septic engineer performs the soil analysis and design, and Animas builds from the approved plan.

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Readers will also find which permits a new septic system needs, what drives cost, and FAQs on system lifespan and advanced treatment. Residential and commercial projects are both covered, and homeowners in town can find more local detail on the company's Durango service area page.

Property owners planning a new build or replacing a failing system can request a free site evaluation through the Animas Excavating contact page or by calling (970) 403-2787. The team will review the property and explain what it needs before any work begins.

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About Animas Excavating

Animas Excavating is a full-service, fully insured and bonded, privately owned small business serving the Four Corners region. We specialize in underground utilities, septic systems, land clearing, land infrastructure, footings, roads, and water and sewer infrastructure. Animas Excavating has a solid reputation of honest, fair, reliable, and quality service.