A deep history of client success.

Grounded in a complete understanding of your project’s specific challenges, ADC delivers original and compliant solutions for design, management, and operational needs.

landscape photograph of an ADC project

Falling Water

Bonney Lake, WA

Design Flow: 75,000 gallons per day

Treatment: Membrane bioreactor (MBR)

Dispersal: 50-zone pressurized gavel bed system

Falling Water

A wellhead protection and critical aquifer recharge area, Falling Water presented a unique challenge due to key zoning limitations. Our first-of-its-kind solution achieved less than 10 nitrogen on the effluent in a robust, reliable, and compact system. Water experts from across the globe have traveled to survey and learn from our solution, which set a new standard for the entire Washington State Department of Health.

Ash Fork

Ash Fork, AZ

Design Flow: 340,000 gallons per day

Application: Developing brand new community infrastructure to collect and treat wastewater to Class A+ effluent for reuse

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Ash Fork

In order to kickstart its community revitalization and support new commercial growth, the town of Ash Fork needed to get off of their current septic-based systems. Further, the town lacked community-wide infrastructure to support a centralized treatment system, so any solution needed to be streamlined, reliable, and affordable while meeting all modern standards.

Working with town managers, ADC developed a preliminary engineering report for a modern wastewater collection, treatment, and reuse system. We helped convey the proposed strategy to the community, and submitted plans for funding from the United States department of Agriculture (USDA), Arizona Water Infrastructure Financing Authority (WIFA), and the United States Department of Housing and Urban Development (HUD).

Kachina Village

Flagstaff, AZ

Project: Community Master Plan

Application: 20-year capital improvement plan for water and wastewater

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Kachina Village

With an aging water and wastewater infrastructure, Kachina Village recognized the need to create a plan that would serve their community long into the future. David Prinzhorn provided a comprehensive overhaul strategy for water, wastewater, and treatment facilities though a 20-year master improvement plan that accounted for the increasing water demands as a result of increasing population and development growth. By proactively attacking the problem, David helped Kachina Village with a sustainable strategy to meet future infrastructure demands, maintain regulatory compliance, and maintain the health and safety of the community.

Additional benefits included:

  • Operational recommendations to maximize system longevity and reducing ongoing costs
  • System condition assessments to aid in future planning of capital expenditures
  • Development of a Water Conservation Program
  • Ensuring a better quality of life for all residents through comprehensive system improvements

ADOT

Statewide, AZ

Construction Cost: $380,000

Application: Major rehabilitation of ADOT water wells

Result: Enhanced water reliability at major Arizona rest areas

ADOT

David Prinzhorn led a comprehensive water well rehabilitation project for the Arizona Department of Transportation, revitalizing key water wells at ADOT’s major rest areas and maintenance facilities. This essential program assessed well conditions, performed preventive maintenance, and completed corrective actions to enhance water performance and reliability for facilities vital to Arizona’s traveling public. The project included in-depth inspections, mechanical and chemical treatments, new pump installations, and rigorous quality testing, all while providing ADOT with real-time updates to support timely, informed decisions. Key sites included Sunset Point, Texas Canyon, and Painted Cliffs rest areas, among others.

Casetta Lago

Woodinville, WA

Design Flow: 14,500 gallons per day

Treatment: Membrane bioreactor (MBR)

Dispersal: Nine-zone pressurized gavel bed system

Casetta Lago

After previous operators had allowed the Casetta Lago system to slip out of compliance and accumulate a growing list of maintenance issues, troubles culminated in a freeze that caused an extreme system malfunction.

Ownership called ADC to set things right.

After expeditiously performing critical repairs, ADC took over operations and brought the the Casetta Lago system back into compliance.

Our philosophy of top-down management and continual system inspection works to prevent these kind of unpleasant surprises. It’s one of the many reasons our clients trust us.

Few companies can consistently deliver professional service in a timely manner. After 25 years of working with ADC, nothing surprises me because I’ve learned they can do anything with excellence.
Tom Barghausen, Barghausen Consulting Engineers, Inc.
There is nobody better for complex projects; they are a group you can put your trust in. They always follow through on timeline and budget with no hassles.
Kurt Wilson, Soundbuilt Homes
Without a doubt, we consider ADC to be one of our greatest assets. Through their exceptional recommendations and solutions, we have been able to significantly improve the efficiency and effectiveness of our wastewater system. We look forward to many more successful projects together.
Alexis Rivera, City of Miami, AZ
ADC has always been timely, professional, and organized – you won’t find a better consultant in the wastewater industry. Even the counter reviewers show them respect; that was unexpected!
Ty Pendergraft, Pendergraft & Associates
ADC brought a diligent, hands-on approach to solving what appeared to be an insurmountable, project-killing hurdle. Their quick response times, accurate cost estimates, and prompt approval timelines set the bar high for all other consultants.
Kathy Orni, D.R.Horton
ADC’s communication and professionalism exceeded my expectations. Their ownership is involved at every level, which shows their pride and care for their clients. An added bonus was their vast knowledge and experience with contractors, all of whom know ADC’s great reputation.
Harley Hill, Washington State Parks
water bubbling texture

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Already have a project in mind or just want to see if we can help? We’d love to hear from you.