Clarksburg
Reclaiming a Backyard from a Forced Mound
Site conditions forced a mound system from day one. When it failed years later, an engineered Hoot H600 BNR replacement gave the family their backyard back — without the mound coming back with it.
This young family built their dream home in Clarksburg, just across the Sacramento River from West Sacramento. Like a lot of properties along the river, theirs came with site conditions that ruled out a conventional septic system — high groundwater, a small lot, and shallow, marginal soil. When they built, the only option Yolo County would approve was a mound.
And so for years, the mound sat in the middle of their backyard. Visible from the kitchen window. Visible from the dining room. Taking up the space where the kids should have been playing and where they should have been hosting family. They didn’t choose the mound — the site did. But they had to live with it every day.
Properties near the Sacramento River share a familiar set of challenges that conventional gravity-fed septic systems can’t handle:
- High groundwater — the water table sits close to the surface and rises seasonally
- Shallow, marginal soil — not enough depth or absorption capacity for a standard leach field
- Small lot footprint — limited area for any system, let alone a sprawling one
A mound system was the only conventional alternative the county would permit at the time. It worked — until it didn’t. After several years of use, the same site conditions that forced the mound in the first place caught up with it. The system began to fail.
This time the homeowners had options the original build didn’t. California’s OWTS (Onsite Wastewater Treatment System) policy and Yolo County’s Local Agency Management Program (LAMP) had since opened the door to advanced treatment alternatives — systems that could handle exactly the conditions that defeated the mound.
Septic engineer David Dauwalder pulled the existing perc and mantle test data from the property’s original permit file, re-evaluated the soil and water table, and confirmed what the homeowners had already lived through: a like-for-like mound replacement would just set up the next failure. The engineered solution was a Hoot H600 BNR (Basic Nitrogen Reduction) Advanced Septic Treatment Tank paired with Geoflow subsurface drip dispersal.
- One tank, one excavation — replaces the mound’s massive footprint with a compact in-ground unit
- Built for fluctuating water tables — the H600’s enclosed treatment process isn’t dependent on soil absorption capacity the way a mound is
- Geoflow drip at 8″ below grade — distributes the high-quality effluent across the whole dispersal area instead of overloading one spot
- Effluent good enough to irrigate — 98% CBOD reduction and 99% TSS reduction means the treated water actually benefits the landscaping above it
The mound is gone. The backyard is back. The family is finally using the space they’ve owned for years — and the new system is engineered for the very site conditions that defeated the last one. Superior On-Site Solutions provides ongoing O&M service for the life of the system.
Engineered Performance That Outlasts the Conditions That Defeated the Mound
High-efficiency aerobic treatment delivers consistent results regardless of seasonal water table fluctuations along the Sacramento River.
Clear, odorless effluent dispersed underground through Geoflow drip tubing — invisible at the surface and clean enough to support the landscaping above.
The same site conditions that defeated the original mound are still there. What changed is the system. The Hoot H600 BNR isn’t just a smaller footprint than a mound — it’s an entirely different treatment approach engineered for sites where conventional systems have nowhere to go.
From Failed Mound to Reclaimed Backyard
When Your Site Made the Original Decision For You
If you’ve got a mound on your property, chances are nobody chose it — the site did. High groundwater, marginal soil, a small lot near water, or a combination of all three left the conventional gravity-fed system off the table and the mound as the only thing the county would permit at the time. That doesn’t mean you’re stuck with it forever.
California’s advanced treatment policy and Yolo County’s LAMP have opened the door to engineered alternatives that work in the exact conditions that forced the original mound. If you’re tired of looking at yours — or if it’s started showing signs of failure — call us at 916-436-8457. We’ll evaluate your site, pull whatever existing perc and soil data is on file, and tell you honestly whether a Hoot replacement makes sense for your property.
Tired of Looking at Your Mound?
You don’t have to wait for it to fail. If a mound system is taking over your backyard, there’s a good chance an engineered Hoot replacement can give you that space back — permanently.