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Project Understanding:

The project is the design of a lift station and transmission line to deliver residential wastewater effluent from family housing, located on the south campus of Northern Arizona University, to an existing lift station of the OWDP, for use on selected test plots for research purposes.

Approach:

The team will provide four design alternatives, as seen in the Figure below, including the final alternative for the lift station and force main.

Design Alternative 1:

Design Alternative 1 will utilize gravity differentials to properly deliver the wastewater to the OWDP site. The design will use the gradual slopes of the hill to the east of the family housing complex as a constant slope to place the piping to deliver the wastewater. The team will evaluate and provide a hydraulic model based on the gravity transmission design to the OWDP site.

Design Alternative 2:

Design Alternative 2 will utilize a path for the piping delivering the wastewater that passes through the residential housing parking lot to the north east of the complex. The route would pass under the family housing complex parking lot. The pipe would then descend a hill to the east of the family housing complex down to the OWDP site. This design may require pressure reduction valves due to the rapid change in elevation between the starting and ending destinations.

Design Alternative 3:

Design Alternative 3 would deliver the wastewater under the family housing complex. This would be the most direct route to the OWDP site. It would cut under the housing complex and down the hill to the east. It is expected this design would require pressure reduction valves to slow down the effluent due to the change in elevation between the start and end destinations.

Design Alternative 4:

Design Alternative 4 will utilize a path for the piping delivering the wastewater that passes between the family housing parking lot and the ROTC training course. The pipe will descend gradually reaching the OWDP site. The team will evaluate and provide a hydraulic model based on the gravity transmission design to the OWDP site.

Scope of Services:

The team will perform the tasks mentioned below for the client in regards to the OWDP located north of the I-40, West of Lone Tree, and South of Pine Knoll Rd. behind the APS electrical grid facility on the Northern Arizona University campus in Flagstaff, Arizona.

Task 1 - Project Management

Task 2 - Site Characterization

Task 3 - Tabulation of Relevant Regulatory, Physical, and University Constraints

Task 4 - Force Main Route Determination

Task 5 - Hydraulic Model

Task 6 - Control Panel Selection

Task 7 - Public Awareness

Task 8 - Final Design