It includes two design alternatives: a municipal lift station (Alt. #1) and a large scale POWTS system (Alt. #2). Also attached are their associated quantities to help generate a rough cost estimate.
 
Notes about the alternatives:
Alternative #1 – Municipal Lift Station

• May require booster lift stations due to the large elevation changes and long distances to the main lift station.
• Will require annexation to the Village of Red Granite. Attached is the change in taxes for the switch over to the Village. Based on 2024 rates (with no change to the Village’s tax base), property taxes could increase by around 40%.

 
Alternative #2 – POWTS

• Currently 157 septic systems in the Pearl Lake Restoration District (PRD). Current design flow for all systems combined is 65,395 gallons per day (assumes 450 gal/day for septic system with unknown flows)
• Proposing four 17,500 gal/day systems with pretreatment located near the lake
• Need to purchase the land for the four systems a minimum of 1500’ apart. Approximately 1 acre of land per system.

Alternative 1 assumptions include:

• Installation of an E/1 grinder station near each home with approximately 100 feet of 1 ¼ inch forcemain and trenching from the E/1 to the street
• Installation of 3-inch low pressure forcemain along the edge of the streets to direct all sewage to a municipal lift station
• Abandonment of the existing on-site septic systems
• Municipal lift station to pump approximately 2 miles to the existing manhole near the Red Granite Treatment plant (6-inch forcemain with air relief manholes placed in the right-of-way of County highway EE)
• Assumed a $100 per month average sewer bill per home once connected to the Village.
• $350,000 home used to complete the tax increase analysis (going from Town to Village).
• Assumes electric service along Hwy EE is adequate to serve the lift station.
• Assumes sandy soil allowing either open cut or directional boring of municipal force main.

Alternative 2 assumptions include:

• Installation of an E/1 grinder station near each home with approximately 100 feet of 1 ¼ inch forcemain and trenching from the E/1 to the street
• Installation of 3-inch low pressure forcemain along the edge of the streets to direct all sewage to a municipal lift station
• Abandonment of the existing on-site septic systems
• Purchase of 4 separate 1-acre parcels for on-site shared wastewater (septic) systems.
• Each of the four systems would fall under a DNR general discharge permit.
• Assumes electric service is available at potential septic sites.
• Assumes four sites would be found that can be purchased and that soils can support an on-site drain field.
• Each system would contract with a qualified firm to perform required maintenance and testing of the system in accordance with General Permit requirements.
• Fees to the firm would cover ongoing metering/monitoring of the system, DNR submittals and a capital replacement fund.

 
The private onsite systems has a higher initial cost but would allow phasing of the project and provide a financial benefit after approximately 30 months due to the estimated tax increases if annexation would occur.