What’s Underground Matters.

Protect your property — and your peace of mind.

**You might not see it, but you’ll definitely notice if it fails.**

That’s why our reinforced septic systems and root cellars are engineered for tough North Idaho winters — and decades of dependable use.

📞 Call us today: 208-263-3979
📩 Request a Quote → bcpi@live.com

Why It Matters

When it’s underground, failure isn’t an option.

From frozen ground to heavy snow loads, North Idaho demands more from your septic systems and root cellars. That’s why Bonner Concrete builds every unit to meet — and exceed — the toughest conditions.

✅ Engineered for extreme cold and shifting soil
✅ Precision-built for decades of performance
✅ Local manufacturing for faster turnaround
✅ Installed by trusted local contractors

Precast Septic Systems

Reinforced concrete for long-lasting strength
Designed to resist cracking and leaks
Meets Idaho code requirements
Multiple sizes available for residential & commercial

Precast Root Cellars

Thick, insulated walls for year-round storage
Naturally cool, moisture-balanced environment
Perfect for food storage, emergency supplies, or wine
Easy access, low maintenance

Trusted by Builders, Homeowners, and Contractors Across North Idaho

I've been purchasing septic tanks from Bonner Concrete for years for my excavation projects, and I’m always impressed by the consistent quality of their products. The concrete tanks are well-made and built to last. On top of that, Dave and Tracy and the rest of the team are fantastic—friendly, knowledgeable, and always provide excellent customer service. It’s a pleasure doing business with a team with integrity, that stands behind their work. Highly recommend Bonner Concrete!

I've had the pleasure of dealing with the team at BCPI while developing my property. They've been immensely helpful, with all the information, details and specs needed prior to ordering, down to rapid, courteous delivery by the owner (Dave) himself! We've purchased concrete fence blocks and a 2500 -gal water tank and will be doing more business together as the project evolves. If you need precast concrete products for your project, BCPI should be your first choice! Highly recommended.

Amazing customer service! Competitively priced, great inventory, knowledgeable and helpful staff. Hands down best place for concrete products!

Absolutely professional people and thorough! The ladies taking your order are knowledgeable and patient when I'm stressed out and forget something! And Jake the delivery guy is Johnny on the spot and gets it done! Fit tanks into tight places for me! Prices are fair and competitive and I'm a lifelong customer! Scot Palmer, Owner HV Contracting, Complex installer!!

Always professional and helpful. It’s the only place I go for my concrete products.

Our company has done business with BCPI for years! They treat their employees and customers like they are family. You will have a very personable experience every time you call or stop by, either for product or just to say hi. Their products are superb! BCPI is always striving to better their customer service experience and product excellence. We have had quite a few customized products precast for us at BCPI facility all have performed above expectations. One example of many is....... , I have never found a better constructed distribution box and septic tank with poured in riser adapters for our septic system precast purchases. Our installation is made easy with these quality products. There delivery service is very professional and communication is great with the office staff and delivery drivers! You will not be disappointed with their products or service. Todd M Douglas Douglas Construction and Custom Cutting Inc.

Built in Sagle. Trusted Across North Idaho.

We’ve been serving the region for over 50 years. Our products are used everywhere from backyard homesteads to large-scale developments — and even right in front of our own office.

Explore Our Products

Single Compartment Septic Tanks

Double Compartment Septic Tanks

Pump Stations

Water Tanks

Root Cellar

Drywells

Manhole Barrels & Covers

Wall Blocks

Don’t wait until it’s too late.

The best time to protect your property is before there’s a problem.