sewer maintenance Articles

  • Using InfoNet to manage a planned sewer maintenance program

    OnSite is a framework contractor for Severn Trent Water, one of the ten water service companies of England and Wales. The company is one of the project coordinators for the utility’s planned sewer maintenance programme and one of three framework contractors working in very close collaboration on its CCTV survey and sewer cleansing program. In addition the company undertakes man-entry surveys, ...


    By Innovyze

  • Prioritising sewerage maintenance using inferred sewer age: a case study for Edinburgh

    The reported research project focuses on using a database which contains details of customer contacts and CCTV data for a key Scottish catchment to construct a GIS based sewer condition model. Given the nature of the asset registry, a key research challenge was estimating the age of individual lengths of pipe. Within this context, asset age was inferred using the estimated age of surface ...


    By IWA Publishing

  • Remediating Unforeseen Sewer Contaminants

    Getting the PCBs out Who: Jersey City, N.J., Municipal Utilities Authority Tons of clean sediment removed: 4,469 Tons of PCB-contaminated sediment: 2,502 Consulting engineer: Boswell Engineering: South Hackensack, N.J. Environmental maintenance contractor: National Water Main ...

  • 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

  • Municipal sewer remote monitoring

    Sewers are critical heavy duty infrastructure components requiring costly maintenance. Many municipalities suffer from ageing pipelines that pose higher chances of failure. Sewer leak or overflow results in high cost as a result of civil reimbursement and due to inflected illness. Moreover Civilian frustration that results form the overflow is often targeted towards the municipality. Overflow can ...

  • On the preventive management of sediment-related sewer blockages: a combined maintenance and routing optimization approach

    In this work we tackle the problem of planning and scheduling preventive maintenance (PM) of sediment-related sewer blockages in a set of geographically distributed sites that are subject to non-deterministic failures. To solve the problem, we extend a combined maintenance and routing (CMR) optimization approach which is a procedure based on two components: (a) first a maintenance model is ...


    By IWA Publishing

  • VortSentry storm sewer upgrade, Markham, ON

    Customer: Brennan Paving Engineering Firm: URS Consultants Contractor: Brennan Paving Approving Agency: URS Consultants & M.O.E. Project Details: This project involved the widening and improving the existing storm sewers on Warden Avenue in the Town of Markham. Some of the products supplied on ...


    By Armtec

  • 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 ...

  • Oil recovery reduces sewer cleaning

    Doskocil Food Service Company, a division of Foodbrands America, Hutchinson, Kan., produces 2 million pounds of pizza toppings a week. After cooking, the meat toppings are flash-frozen in one of two spiral freezers. Air currents within the freezer carry grease-containing vapors through the ammonia freezer coils, where they adhere and become lodged. Doskocil uses 1,600 gallons of water per hour to ...


    By Oil Skimmers, Inc.

  • VortSentry storm sewer upgrade, Markham, ON

    Customer: Brennan Paving Engineering Firm: URS Consultants Contractor: Brennan Paving Approving Agency: URS Consultants & M.O.E. Project Details: This project involved the widening and improving the existing storm sewers on Warden Avenue in the Town of Markham. Some of the products supplied on ...


    By Armtec

  • Maintenance for septic tanks

    Septic tanks are widely used for on site sewage treatment for domestic homes which are not connected to the sewer system. Little attention is given to the septic tank until there are problems such as smells or poor drainage or ponding on the surface. A little maintenance of the septic tank can be very helpful in maintaining performance of the septic tank. The outflow from a septic tank percolates ...


    By Biofuture Ltd

  • Mono nov holds the key to sewer improvements

    Previously there was no screening treatment in place, and stormwater was discharged directly into the River Lune.The improvement project, fully designed and managed on behalf of United Utilities by Bechtel, involved constructing a low level chamber, incorporating nine L Series Discreens®, and three Series ‘A’ Munchers®, to screen and condition screenings before discharging the clean water into ...


    By NOV Mono - Mono Pumps Ltd

  • Incorporating Risk into Mechanical Maintenance Decisions

    ABSTRACT County Sanitation District 1 (CSD-1) provides wastewater collection services to about 269,000 connections in the Sacramento, California region. CSD-1 has nearly 2,800 miles of mainlines and collectors and operates 95 sewer pump stations. CSD-1 has implemented a risk based asset management program in both the pipeline and pump stations areas of the collection system. Though the two ...

  • Vacuum Sewers – Engineered Solution for a Multitude of Problems

    ABSTRACTThe City of Albuquerque is celebrating its 300th anniversary in the 2006. The city itself has been growing at a very rapid rate, expanding the urban boundaries into the rural countryside. This urban expansion has been most apparent in the river valleys of the Rio Grande, where groundwater is shallow and topography is very flat. As the urbanization of the valley areas north and south of ...

  • 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 ...

  • Delivering an Enhanced Sewer Condition Prioritization Process

    SCREAM™ is a sewer and manhole condition assessment tool developed by CH2MHill. It has been built into Wallingford Software’s InfoNet asset management solution as one of the standard choices for sewer and manhole condition grading. There is emphasis across the collections systems industry worldwide for sewer condition prioritization methods and manhole condition ranking. Although currently the UK ...


    By Innovyze

  • Black & Veatch to design sewer/stormwater facilities for Cincinnati

    Black & Veatch (Overland Park, KS) announced that it has received a contract to design a $244 million tunnel system, pump station, and treatment facility in Cincinnati, Ohio, to help the city better manage its sewage and stormwater flows. The company said that it is currently conducting geotechnical investigations to determine the location ...

  • DFW direct bury of storm sewer case study

    Airport Solutions North Texas Contracting has placed the first HOBAS pipe at DFW International Airport in the Dallas/Fort Worth mid-cities. That first installation was a repair to an 84-inch corrugated steel culvert that had failed and created a sink hole approximately 30 feet deep and almost 20 feet in diameter after a series of heavy rains in 2007. North Texas Contracting of Keller, Texas ...


    By Hobas Pipe USA

  • A new vision on the condition of city of Toronto’s sewer networks

    Situation And Objectives After the amalgamation of Toronto in 1998, Toronto Water – the department in charge of managing the combined infrastructure systems – was mandated to consolidate all underground facilities data and centralize sewer inspection processes on behalf of the newly merged city. Ten years later, a great deal of work in this regard remained undone. It was a ...


    By CTSpec Inc

  • Risk assessment of sewer condition using artificial intelligence tools: application to the SANEST sewer system

    Operation, maintenance and rehabilitation comprise the main concerns of wastewater infrastructure asset management. Given the nature of the service provided by a wastewater system and the characteristics of the supporting infrastructure, technical issues are relevant to support asset management decisions. In particular, in densely urbanized areas served by large, complex and aging sewer ...


    By IWA Publishing

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