Title

River Trunk Realignment

Lead Author Major

Civil Engineering

Format

SOECS Senior Project Demonstration

Faculty Mentor Name

Luke Lee

Faculty Mentor Department

Civil Engineering

Additional Faculty Mentor Name

Camilla Saviz

Additional Faculty Mentor Name

Gary Litton and Scott Merry

Abstract/Artist Statement

According to City of Modesto’s 2007 Wastewater Collection System Master Plan and City Staff, there is interest in realigning the River Trunk, which serves as one of the five major trunk lines for the City. The River Trunk conveys municipal wastewater flows from four sewer tributary areas to the Sutter Treatment Plant. The total length of this trunk sewer is approximately five miles. The trunk realignment for this project starts at 9th Street and ends at the Sutter Plant. Due to a 10 feet grade differential between 9th Street and Sutter Plant, a lift station may be needed. Realignment of the River Trunk is deemed necessary in order to increase access for trunk maintenance, facilitate permitting and mitigate environmental risk. Access to the River Trunk is an issue because operation and maintenance crews do not have space to mobilize equipment on site in case of repairs or emergencies. Permitting is a challenge because the City must coordinate with multiple agencies such as Army Corps of Engineers, Department of Fish and Game, and California Regional Water Quality Control Board prior to any work performed on trunk sewer. Pipe reliability and risk of potential environmental impacts are concerns given trunk is in the FEMA 100 year flood zone. BICK Engineering Consultants is proposing two alternatives for the realignment of the River Trunk. Alternatives are based on the review of a condition assessment for the River Trunk and using existing monitoring flow data provided by the City. BICK Engineering’s alternative designs include hydraulic, geotechnical and structural design components. Deliverables of this design project include a site layout for each realignment alternative, a lift station design for one alternative, cost analyses, environmental assessment, and detail plan sheets.

Location

School of Engineering & Computer Science

Start Date

2-5-2015 2:30 PM

End Date

2-5-2015 4:30 PM

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May 2nd, 2:30 PM May 2nd, 4:30 PM

River Trunk Realignment

School of Engineering & Computer Science

According to City of Modesto’s 2007 Wastewater Collection System Master Plan and City Staff, there is interest in realigning the River Trunk, which serves as one of the five major trunk lines for the City. The River Trunk conveys municipal wastewater flows from four sewer tributary areas to the Sutter Treatment Plant. The total length of this trunk sewer is approximately five miles. The trunk realignment for this project starts at 9th Street and ends at the Sutter Plant. Due to a 10 feet grade differential between 9th Street and Sutter Plant, a lift station may be needed. Realignment of the River Trunk is deemed necessary in order to increase access for trunk maintenance, facilitate permitting and mitigate environmental risk. Access to the River Trunk is an issue because operation and maintenance crews do not have space to mobilize equipment on site in case of repairs or emergencies. Permitting is a challenge because the City must coordinate with multiple agencies such as Army Corps of Engineers, Department of Fish and Game, and California Regional Water Quality Control Board prior to any work performed on trunk sewer. Pipe reliability and risk of potential environmental impacts are concerns given trunk is in the FEMA 100 year flood zone. BICK Engineering Consultants is proposing two alternatives for the realignment of the River Trunk. Alternatives are based on the review of a condition assessment for the River Trunk and using existing monitoring flow data provided by the City. BICK Engineering’s alternative designs include hydraulic, geotechnical and structural design components. Deliverables of this design project include a site layout for each realignment alternative, a lift station design for one alternative, cost analyses, environmental assessment, and detail plan sheets.