Projects

Interlochen State Park Wastewater Feasibility Study and Improvements

Interlochen, MI

Gosling Czubak was selected and completed the preliminary engineering study for the viability of the old wastewater facility at the State Park. Work included performing composite sampling of wastewater from the main lift station, sludge depth sampling of existing lagoons, as-built review of original design drawings, comparison of original design to new design standards, review of recent Department of Environment, Great Lakes and Energy (EGLE) mandated sampling results, review of occupancy data and its relation to the strength of waste water, writing a report of our findings, which includes an analysis of costs to repair the existing facility and two alternatives, including a new treatment plant.

From the study, the DNR decided to move forward with improvements to the wastewater facility, initially with the addition of a headworks (preliminary screening) and ultimately with a full wastewater treatment facility.  Permitting and a full Hydrogeological Study, including the installation of groundwater monitoring wells was completed during the engineering design phase.  

The new plant was sized for an average daily flow of 17,000 gpd and a peak of 39,000 gpd and utilizes mechanical screening, Sequencing Batch Reactors, and tertiary filtration with chemical feed, before being discharged into Rapid Infiltration Basins.

The treatment facility was constructed on-time and within budget, even after several DNR requested additions.