sewer districts Articles

  • Rehabilitation of a Large Semi-Elliptical Sewer

    ABSTRACTThe Sanitation Districts of Los Angeles County (Districts) own, operate, and maintain a wastewater treatment and collection system that includes approximately 1300 miles of sanitary sewers ranging from 6 to 144 inches in diameter. A portion of the Districts’ Joint Outfall “A” Trunk Sewer was constructed of cast-in-place reinforced concrete having a semi-elliptical cross section and ...

  • Northwest Side Relief Sewer

    Meticulous planning, design and construction management went into devising reliable solutions for this award-winning tunnel project that alleviated persistent flooding and improved the community's water quality. Like many U.S. cities, Milwaukee faced a serious and growing problem. Population growth and urban development had produced ever-increasing volumes of wastewater and stormwater. Aging and ...


    By Black & Veatch Corporation

  • Sewer Siphon Assessment and Air Jumper Design

    ABSTRACTIn response to customer complaints about sewer odor, Orange County Sanitation District (OCSD), California launched a project to investigate the ventilation requirements of existing sewer siphons, to verify adequacy of existing air jumper operation, and determine the need for new air jumpers or additional air jumper capacity. The challenge was assessing sewer siphon air jumper adequacy ...

  • Infiltration Study Poses Challenges But Could Save Millions on Treatment Plant

    Lower 48 Instruments works in partnership with consulting engineers to provide equipment and manpower for flow studies. IBI Group, out of Columbus, OH, USA, contracted with the company to provide placement expertise, equipment and data collection for a period of 60 days. Lower 48 installed 16 meters across the combined sewer district collection system to measure flow as well as rainfall-event ...


    By In-Situ, Inc.

  • Watershed characterization and planning to help District meet consent decree case study

    Sanitation District No. 1 of Northern Kentucky has signed the nation’s first wet weather consent decree based on the principles of adaptive watershed management. LimnoTech is working with the District, its gray and green infrastructure consultants, and stakeholders to develop watershed plans that meet requirements of the consent decree for sewer overflows. Problem The ...


    By LimnoTech Inc.

  • Avoiding Sewer Fires with Vapor Space Organics Monitoring

    ABSTRACTRegulation of flammable gases released from wastewater discharges is facilitated by the use of the Vapor Space Organics test method. Such regulation can reduce the risk of a flash sewer fire, resulting damage and potential injury. The updated 2003 VSO process developed by Severn Trent Laboratories produced data that was equivalent to the 1990 VSO process developed and used by the ...

  • Sewer Line Upsize in Perris, CA - Case Study

    Innovative pipebursting approach successfully upsizes old trunk sewer line to serve a new Southern California subdivision Challenge Burst a 350-foot-long trunk line, replacing 10-inch clay pipe with 14-inch SDR-17 polyethylene pipe. Solution We helped Young Homes close escrow on the 95 homes in its Perris, CA ...


    By Tric Tools, Inc.

  • Feasibility study of Using GVRD sewers as heat sources and sinks

    Executive Summary As pari of the Sustainable Region Initiative (SRI) the Greater Vancouver Regional District (GRVD) Policy and Planning Department has commissioned this study to investigate the use of district sewers as heat sources or heat sinks. This conceptual study examines the technology available for sewer heat transfer, and provides a mathematical and physical model of a heat transfer ...


    By RABTHERM AG

  • A Toxic Odor Problem Is Reduced to Almost Nothing - South Coast Water District case study

    Business OverviewThe South Coast Water District provides fresh water and sewer service to more than 40,000 residents and more than two million visitors a year in the California coastal communities of Dana Point, South Laguna Beach and San Clemente. The district delivers 7 million gallons of water each day to homes and businesses and removes 4 million gallons of wastewater for treatment. The ...


    By BioMagic

  • Quantifying Sub-Surface Discharges from Individual Sewer Defects

    ABSTRACTThe California Regional Water Quality Control Board, Santa Ana Region (RWQCB) required wastewater collection agencies in Orange County to report discharges from “pipe breaks, leaking sewer pipes and joints, and other subsurface discharges of wastewater.” The Orange County Sanitation District (OCSD), in conjunction with a research team from University of California, Irvine (UCI), developed ...

  • Panorama Ridge Sewer Utility Access, Surrey, British Columbia - Case study

    Project Name: Panorama Ridge Sewer Utility Access Product: Grasspave2 grass reinforced utility access Application: Utility Access City: Surrey State/Province: British Columbia Install Date: 2003 ...


    By Invisible Structures, Inc.

  • Pearl river valley water supply district case study

    Performance History and Discussion In-Pipe Technology implemented the first phase of a collection system Professional Services Program in 2001. Beginning in 2002, additional collection system basins were added to the services program. Currently, the treated areas include the North and South shore of the Pelahatchie Bay, the Main Harbor, and two Lagoon Waste Water Treatment Plant (WWTP) ...

  • Increased Pressure Removes “Pressure” for Regional Sewer Authority

    Founded in 1925, the Western Carolina Regional Sewer Authority (WCRSA) is a special purpose district of South Carolina, located in northwestern South Carolina. The organization serves over 400,000 customers in Greenville County and parts of Anderson, Spartanburg, and Laurens Counties, covering a total of 296 square miles. WCRSA maintains 300 miles of major sewer trunk lines and conducts ...


    By Gorman-Rupp Co.

  • Pumping Wastewater into Existing Pressure Sewer

    Romtec Utilities designs, manufactures, and supplies pumping systems for many different applications. Our systems include all structural, all mechanical, all electrical, and all communications systems in a single purchase. Many of our systems are designed and supplied to handle sewage and wastewater flows in a lift station design. In many scenarios, these lift stations ...


    By Romtec Utilities Inc.

  • GTI’s odor control system ends neighbors’ complaints - case study

    The South Dearborn Regional Sewer District in Lawrenceburg, Indiana, provides regional wastewater treatment ser vices for three cities and an international distillery. As the community grew, wastewater treatment plant managers at the South Dearborn Regional Sewer District saw an increase in complaints from neighbors about a foul smell lingering in the area. Odor complaints became a sensitive ...

  • A novel freeze protection strategy for shallow buried sewer pipes: temperature modelling and field investigation

    The burial of sewer and water pipes below the maximum ground frost depth can be very costly and laborious in regions with cold winters. If a freeze protection measure is applied, the utility lines can be installed in a shallower trench to reduce the excavation needs. One freeze protection measure, so called heat tracing, consists of supplying heat along the pipes. In this work, the use of 4th ...


    By IWA Publishing

  • Climate change: More intense rains could swamp Chicago`s aging sewers

    In a city built on a swamp, where rainstorms already flood basements and force sewage into Lake Michigan and local streams, climate change could make Chicago's chronic water pollution woes even worse. Researchers hired by Mayor Richard Daley's office estimate that intense rainfall will happen more frequently in the not-so-distant future because of warming global temperatures, challenging the ...

  • Sewer Collection System Bioaugmentation Reduces Influent Load and Improves Plant Performance

    Abstract The effectiveness of In-Pipe Technology (IPT) patented sewer collection system engineered bioaugmentation on i) influent wastewater loads to wastewater treatment plant (WWTP), ii) WWTP performance, and iii) effluent quality, was a demonstrated at a domestic sequencing batch reactor (SBR) WWTP (Sewer District #20) in Suffolk County, Long Island, New York in collaboration with the ...

  • Another Sewer from Hell - The City of Richmond, British Columbia, Canada Experience

    ABSTRACTThe City of Richmond has a population of approximately 180,000 and is located on a flood plain at approximately sea level. These physical attributes present numerous challenges with underground utility design, including sanitary sewers. On January 21, 2005 the City declared a local state of emergency near the intersection of No. 3 Road at Cook Road due to the development of a large ...

  • Toxic Odour Problems Eliminated - Case Study

    Industry: Municipal Wastewater Problem: Lift Station Odour and Hydrogen Sulphide Control Business Overview The Water District provides fresh water and sewer service to more than 40,000 residents and more than two million visitors a year in this coastal community. The district delivers 25 million litres of water each day to ...

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