Wastewater Collection Systems Projects

Overview

Wastewater Collection System
Service Overview

West Yost’s expertise covers every type of wastewater facility and process, from collection and treatment systems through disposal and reclamation facilities. We provide a full service approach across the entire spectrum of disciplines including technical studies; system modeling; regulatory and permitting assistance; advanced treatment plant design; funding assistance; and construction management. Our firm’s unique ability and experience working with clients from permitting through construction bring intrinsic value to our projects and our clients. We bring knowledge gained from the permitting and regulatory process into the planning and design of facilities that meet our clients performance goals, and apply our construction knowledge to the design process to reduce cost and risk during construction.

Our wastewater expertise includes the following:

Collection System

  • Collection System Master Planning and Hydraulic Modeling
  • Sewer System Management Plans
  • Collection System Regulatory Compliance
  • Infiltration and Inflow Program Development
  • Condition Assessment and Rating
  • Maintenance Planning Support and CMMS Optimization
  • CCTV Program Development and Support
  • Prioritized Capital Improvement Programs Development
  • Studies and Predesign for Sewer Replacement and Capacity Enhancement Projects
  • Rate, Funding, and Financing Analysis
Overview

Wastewater Collection Systems

Video

Influent Pump Station, Mt. View Sanitary District – Old Pump Station, Small Budget, Big Improvement

2016 Winner of CASA’s Outstanding Capital Project, Small Agency

Project

I-680 at Sabercat Road Sanitary Sewer Relocation Project
Union Sanitary District, California

The I-680 at Sabercat Road sanitary sewer in Fremont, California, is a 12-inch diameter vitrified clay pipe (VCP) gravity pipeline installed about 50 years ago by open-cut trenching.  A CCTV survey revealed that the existing pipeline was severely offset where it crossed the Hayward fault.  The pipeline was replaced using trenchless methods (tunneling) along a parallel alignment 30 feet north of the existing pipeline which allowed the existing pipeline to remain active during construction.  The new alignment is approximately 1,000 feet long, has a depth of cover varying from a

Project

Downtown Sewer Replacement Project
City of Yuba City, California

West Yost designed the relocation, replacement, and/or rehabilitation of existing sewers in the City’s downtown residential area to address structural deficiencies, maintenance issues, and system reliability. The existing sewers were installed nearly 100 years ago and could not be cleaned or maintained due to pipe fragility and lack of access. The challenges of replacing these backyard sewers included access, public outreach, homeowner coordination, design approach, and construction methods for rerouting sewer laterals.

Project

Sewer Planning Support, Hydraulic Model and Master Plan Update
City of Richmond, California

West Yost developed City-wide flow monitoring programs for two consecutive wet weather seasons in order to quantify I/I and provide data for hydraulic model calibration. The master plan was designed to address aggressive deadlines for infiltration and inflow (I/I) and sanitary sewer overflow reduction that are required to meet a settlement agreement with San Francisco Baykeeper. West Yost also developed an innovative flow monitoring program in order to identify and quantify tidally-influenced I/I that collection system operators suspected was occurring.

Project

Wet Weather Alternatives Analysis
City of Millbrae, California

Faced with tight deadlines under a Baykeeper consent decree to complete multiple capacity upgrades, West Yost helped the City evaluate its options for implementing a long-term plan to reduce infiltration and inflow (I/I) through collection system rehabilitation and private lateral programs. The analysis included identifying and prioritizing subbasins within the collection system with the largest I/I levels by analyzing flow monitoring data and hydraulic model calibration results.

Project

Wastewater Collection System Asset Management Plan and Master Plan Update
Castro Valley Sanitary District, California

As consulting District Engineer, West Yost developed a gravity sewer Asset Management Program, and is currently conducting wet weather flow monitoring for use in recalibrating the District’s existing hydraulic model. Key components of this work included:

Project

Sewer Planning Support, Hydraulic Model and Master Plan Update
City of Richmond, California

West Yost developed City-wide flow monitoring programs for two consecutive wet weather seasons in order to quantify I/I and provide data for hydraulic model calibration. The master plan was designed to address aggressive deadlines for infiltration and inflow (I/I) and sanitary sewer overflow reduction that are required to meet a settlement agreement with San Francisco Baykeeper. West Yost also developed an innovative flow monitoring program in order to identify and quantify tidally-influenced I/I that collection system operators suspected was occurring.

Project

Wet Weather Alternatives Analysis
City of Millbrae, California

Faced with tight deadlines under a Baykeeper consent decree to complete multiple capacity upgrades, West Yost helped the City evaluate its options for implementing a long-term plan to reduce infiltration and inflow (I/I) through collection system rehabilitation and private lateral programs. The analysis included identifying and prioritizing subbasins within the collection system with the largest I/I levels by analyzing flow monitoring data and hydraulic model calibration results.

Project

Wastewater Collection System Asset Management Plan and Master Plan Update
Castro Valley Sanitary District, California

As consulting District Engineer, West Yost developed a gravity sewer Asset Management Program, and is currently conducting wet weather flow monitoring for use in recalibrating the District’s existing hydraulic model. Key components of this work included:

Video

Influent Pump Station, Mt. View Sanitary District – Old Pump Station, Small Budget, Big Improvement

2016 Winner of CASA’s Outstanding Capital Project, Small Agency

Project

I-680 at Sabercat Road Sanitary Sewer Relocation Project
Union Sanitary District, California

The I-680 at Sabercat Road sanitary sewer in Fremont, California, is a 12-inch diameter vitrified clay pipe (VCP) gravity pipeline installed about 50 years ago by open-cut trenching.  A CCTV survey revealed that the existing pipeline was severely offset where it crossed the Hayward fault.  The pipeline was replaced using trenchless methods (tunneling) along a parallel alignment 30 feet north of the existing pipeline which allowed the existing pipeline to remain active during construction.  The new alignment is approximately 1,000 feet long, has a depth of cover varying from a

Project

Downtown Sewer Replacement Project
City of Yuba City, California

West Yost designed the relocation, replacement, and/or rehabilitation of existing sewers in the City’s downtown residential area to address structural deficiencies, maintenance issues, and system reliability. The existing sewers were installed nearly 100 years ago and could not be cleaned or maintained due to pipe fragility and lack of access. The challenges of replacing these backyard sewers included access, public outreach, homeowner coordination, design approach, and construction methods for rerouting sewer laterals.

Overview

Reuse Projects
Wastewater Collection

Project

Southeast Growth Area Water, Wastewater, and Recycled Water Modeling and Analysis
City of Fresno, California

West Yost provided hydraulic modeling, analysis, and model development of recommended backbone potable water, wastewater, and recycled water infrastructure required to serve buildout of the proposed Southeast Growth Area (SEGA) Project located in Fresno, California.

Project

Reclaimed Water Distribution System Project
City of Medford, Oregon

West Yost assisted the City with their development of using treated wastewater for agricultural irrigation. This effort has been in response to increasingly stringent discharge requirements imposed by the Department of Environmental Quality (DEQ) for discharge of effluent to the Rogue River. West Yost developed the facilities plan which recommended that the City further evaluate reclaimed water production to reduce the impact of pending Total Maximum Daily Loads (TMDLs) on the Rogue River.

Project

Recycled Water Hydraulic Model
City of Roseville, California

West Yost provided the City with validation of its recycled water system hydraulic model, which originally was developed by City staff using H2OMAP®. West Yost also provided an extended period model that represents the current operational condition of the recycled water system. West Yost utilized the hydraulic model to evaluate scenarios to optimize the use of recycled water and provided flexibility in the operation of the system for future demands. The resulting work allows operational decisions to be made to reduce wastewater discharges.

Project

Downtown Sewer Replacement Project
City of Yuba City, California

West Yost designed the relocation, replacement, and/or rehabilitation of existing sewers in the City’s downtown residential area to address structural deficiencies, maintenance issues, and system reliability. The existing sewers were installed nearly 100 years ago and could not be cleaned or maintained due to pipe fragility and lack of access. The challenges of replacing these backyard sewers included access, public outreach, homeowner coordination, design approach, and construction methods for rerouting sewer laterals.

Project

14-Mile Slough Pump Station
City of Stockton, California

West Yost provided design and construction management services to expand the existing 14-Mile Slough Pump Station (14-MSPS) by nearly 700%. This project represents one of the largest trench-style wetwell pump stations in California. The award-winning pump station upgrade increased reliable pumping capacity from 3.75 mgd to 14 mgd, and with a buildout capacity of 22.5 mgd.

Project

Design/Build Program and Construction Management Collection System 9
City of Stockton, California

West Yost assisted the City with a design-build for a $14 million project to extend sewer lines to an undeveloped area in northeast Stockton. West Yost served as the City’s representative to complete 30 percent design, right of way acquisition, design build team procurement, and construction management services. Construction management services included all contract administration, full-time onsite construction monitoring, and all closeout activities.

Commands