Adkins Consulting Engineering, LLC :: Wastewater


Adkins is the local leader in wastewater engineering services, providing a comprehensive suite of services that support our clients with efficient and sustainable solutions for all wastewater needs.

Our team includes experts for every step of your wastewater project, from alternative analysis, permitting, and design, to construction management. Our engineers are well-versed in the latest innovations and effective technologies, all while considering the client’s budgetary constraints and desired level of complexity. We help select and design the best solution to meet our client’s sanitation needs while protecting the natural environment for future generations.

Adkin’s wastewater services include:

Alternatives analysis and planning

Adkins has prepared hundreds of facility plans, engineering reports, and feasibility studies for our clients. Our experience and track record make us a regional industry leader in preparing these crucial planning materials to ensure the future viability and success of our clients.

Project cost estimation

We are involved in all aspects of providing accurate project cost estimates including all levels of estimation, cost analysis, financial planning, and funding procurement, which are all key for a successful project. We seek to provide our clients with the optimal balance between schedule, quality, and cost, and use our combined experience to provide a high level of accuracy.

Funding and grant application assistance

The Adkins team is experienced and well-versed with all state, federal, and other funding programs, which allows us to support our clients in optimizing project funding. We understand the details and intricacies of funding programs and can help our clients avoid financial pitfalls and have the best chance to successfully procure funding.

Regulatory compliance and permitting

We are also experts in supporting our clients with obtaining and maintaining compliance with all local, state, and federal environmental regulations and other permitting requirements. Our team regularly monitors regulatory updates to ensure our clients adhere to all regulatory requirements and can be prepared for upcoming regulatory changes.

Wastewater Treatment

Adkins has completed dozens of wastewater treatment facility upgrades and design projects in the region and has experience with a diverse range of wastewater systems. Our treatment experience includes, but is not limited to the following types of wastewater systems:
  • Mechanical treatment plants including sequencing batch reactors (SBRs) and Membrane bioreactors (MBRs)
  • Natural and wetland treatment systems
  • Facultative lagoons
  • Biosolids

Treated wastewater reuse

Adkins understands that reuse is the way of the future and we’ve been supporting clients to employ beneficial reuse of wastewater in both new designs as well as upgrades. We have experience with direct and indirect surface water discharges, subsurface systems using pressure distribution and drop irrigation, spray field irrigation, as well as pumping and distributing treated wastewater for beneficial reuse.

Lift station design and refurbishment

Our team of engineers has experience with analyzing, designing, rehabilitating, and constructing lift stations, including submersible, above grade self-priming, and dry-pit pumps.

Sewer collection system design and refurbishment

Adkins has performed a comprehensive array of collection system engineering projects ranging from Infiltration and Inflow (I/I) studies and capacity analysis to flow monitoring and video studies. Our talented engineers have designed gravity and pressure sewers, designed and rehabilitated force mains, designed and rehabilitated lift stations, and we have also rehabilitated existing collection systems.


South Suburban Sanitary District, Klamath Falls, OR – Aeration System Improvements

South Suburban Sanitary District (SSSD) pursued improvements in operation efficiency of their aeration treatment ponds with a $77,000 incentive from the Energy Trust of Oregon. SSSD selected Adkins and CH2M Hill to help retrofit the diffuser system in their existing treatment ponds by installing 1,700 feet of aeration piping, and replacing 158 coarse bubble diffusers with 63 fine pore diffusers. This design provided greater oxygen transfer efficiency in treatment of the influent raw sewage and resulted in an overall reduction in blower energy consumption. Adkins assisted SSSD and CH2M Hill with design, construction staking, and construction management services of the aeration system improvements. The resulting project upgrades provided a 33% reduction in energy consumption compared to the previous 9-year average, saving the District approximately $40,000 per year.

City of Chiloquin, OR - Preliminary Engineering Report and Wastewater Treatment Plant Upgrades

The City of Chiloquin was issued a Notice of Noncompliance for failing to meet total suspended solids (TSS) concentration limits, and was required to implement corrective measures and improvements. Adkins was selected to evaluate regulatory compliance issues and outline a list of potential improvement alternatives in a Preliminary Engineering Report. Adkins’ report included a comprehensive evaluation of the wastewater treatment and disposal system and identified recommended improvements for measuring influent flows, chlorination and dechlorination of treated wastewater, sludge drying beds, and the standby generator. We assisted the City of Chiloquin with all stages of the wastewater treatment plant upgrade, including funding applications, permitting, planning, design, and construction. The resulting upgrade project was 100% grant funded.

City of Tulelake, OR – Wastewater Facilities Plan, Planning, and Design of Collection System Improvements

The City of Tulelake selected Adkins to help when faced with disciplinary actions due to being out of compliance with NPDES permit limitations for effluent BOD, pH, and temperature. Adkins designed an economical and environmentally sound solution using wastewater treatment wetlands. A key to success for this project was developing a financial plan and procuring 100% grant funding for the necessary improvements. Phase 1 of this project included the replacement of 3,000 feet of sewer main, the design of one new lift station, and refurbishment of three existing lift stations.