Sewer System Design and Permitting

TLI has experience with all levels of wastewater treatment. Staff designed individual conventional systems utilizing septic tanks and drainfields, Level 2 Treatment Systems capable of reducing nitrate levels in effluent by more than 50%, and more innovative treatment systems capable of nitrate reductions over 75%.

Territorial-Landworks, Inc. has the staff and expertise available to complete the full spectrum of your sewer system design and permitting needs. Our staff has the experience to accomplish all realms of wastewater design from an individual septic system equipped with a gravity drain field to a public sanitary sewer collection system equipped with a treatment facility. Our many years of experience with wastewater projects allows our design team to assess your project and determine the most cost effective solution to your developments needs. We have been recognized for our expertise in the area of wastewater design by being one of three firms in Montana on the MDT prequalification list for public water supplies and wastewater treatment.

Permitting has become a very important part of all realms of a construction project. TLI has formed great relationships with members of both federal and state agencies in charge of issuing the permits necessary for your wastewater project. Because of TLI’s experience and relationships with these agencies, staff can prepare an application and get permit response in a cost effective and timely manner.

As awareness increases of the effect we have on our environment, it becomes more imperative for us to employ smart and safe practices. As a result, we must evaluate the effect all phases of development will have on our environment. A properly designed and maintained wastewater system is vital for a healthy environment. If improperly treated wastewater is released into the surroundings, nitrate levels in the groundwater are affected, lowering drinking water quality. Also, contamination of surrounding surface water can affect fish populations and jeopardize the health of rivers and streams.

TLI has experience with all levels of wastewater treatment. Staff designed individual conventional systems utilizing septic tanks and drain fields, Level 2 Treatment Systems capable of reducing nitrate levels in the effluent by more than 50%, and more innovative treatment systems capable of nitrate reductions over 75%. TLI is the design engineer for a subsidiary company, Northwest Water Systems, which designs a state-of-the-art Sequencing Batch Reactor capable of treating effluent to nitrate levels below 7.5 ppm. Technology such as this can be installed in areas with very poor existing groundwater conditions and will actually improve the aquifer properties.

Some of the specific services provided by TLI are:

  • Septic Permitting
  • Individual Drainfield Design and Inspection
  • Lift/Pump Station Design
  • Pump Sizing
  • Discharge Permitting
  • Gravity Main Design
  • Force Main Design
  • System Evaluation
  • Conventional Treatment System Design
  • Level 2 Treatment System Design
  • Groundwater Assessment
  • Feasibility Analysis