RMC employs recognized industry experts for all aspects of wastewater planning and design projects—including master planning and modeling, infiltration/inflow analysis, condition assessment, O&M assessment, capital project planning and prioritization, pipeline design, trenchless construction technology, and asset management.

Walsh Avenue Sanitary Sewer Improvements

City of Santa Clara

The Walsh Avenue Trunk Sewer Improvements Project is one of the most critical elements of the overall sewer improvements program that RMC recommended in its sanitary sewer capacity assessment study for the City of Santa Clara. RMC designed the 2 ½-mile pipeline to reduce construction cost, minimize community impacts, reduce downstream pumping costs, and provide system flexibility. RMC’s work included:

• Several trenchless crossings, including a railroad crossing and siphon crossing under San Tomas Creek
• Utility identification and potholing due to 10 different fiber-optic companies’ location along the alignment
• Optimizing hydraulics to ensure proper flow conveyance

Flint Pump Station Upgrade

City of San Mateo

RMC completed a condition assessment and design for replacing San Mateo’s Flint Pump Station with new facilities adjacent to the existing pump station. The new wastewater pump station:

• Pumps wastewater via a 20-inch diameter force main to the City’s wastewater treatment plant
• Includes three non-clog submersible, 50 horse power pumps with variable frequency drives
• Includes a new concrete wet well, dry pit, and metering facilities
• Is located under a bike lane and parking area because of the constrained site

 

Downtown Trunk Sewer Rehabilitation Phase 3

City of Antioch

RMC designed the rehabilitation of an unlined reinforced concrete and vitrified clay pipeline, a critical trunk line located in the middle of Antioch’s downtown business district. We developed plans and specifications using the segmental sliplining rehabilitation method, which resulted in the trenchless installation of a structural liner within the aging concrete pipe. The project incorporated:

• Fast-track, trenchless technology design
• Improved maintenance access
• Installation of a minor siphon and air jumper to solve a conflicting storm drain problem
• Techniques to minimize disturbance to businesses

 

Sewer Master Plan

City of San Jose

Between 2003 and 2004, RMC master-planned the central portion of San Jose—comprised of 185 miles of sewers—as part of a citywide master plan. In 2006 we were selected for the second phase which addresses the remaining areas of the City and updates the Phase I areas to include an expanded sewer network and more focused analysis on priority development areas. RMC:

• Conducted wet weather flow monitoring
• Constructed a dynamic hydraulic model of the central area system
• Developed capacity improvement projects and program
• Conducted extensive training of city staff in use of the model

 

Temecula Area Sewer Flow Monitoring and Model Calibration

Eastern Municipal Water District

RMC is overseeing flow monitoring and calibrating Eastern Municipal Water District’s sewer model, which was last calibrated in 2008 and is currently predicting a number of inaccurate deficiencies. Our team is performing a more comprehensive monitoring program than earlier efforts, and is calibrating the model to more accurately reflect current and projected conditions within the collection system. The first phase of the project will:

• Capture a combination of wet and dry weather flows
• Calibrate the model and evaluate inflow and infiltration
• Document the calibration results and recommend wastewater flow factors by land use type and peaking factor equation

District 6 Trunk Sewer Design

Orange County Sanitation District

RMC is working on pre-design and design for the District 6 Trunk Sewer Relief project, part of Orange County Sanitation District’s 60 year old system in Newport Beach. The project is needed to reduce risk of sanitary sewer overflow, correct hydraulic deficiencies, and improve safety of maintenance crews. RMC’s planning and design efforts include:

• Hydraulic modeling
• Pipeline rehabilitation
• Manhole access improvements
• Environmental assistance