Manhole Systems Articles

  • Pioneering Primer from Plastics Pipe Institute

    With administrative offices located in Dallas, Texas, The Plastics Pipe Institute Inc. (PPI) is the major trade association representing all segments of the plastics piping industry. PPI members share a common interest in broadening awareness and creating opportunities that expand market share and extend the use of plastics pipe in all its many applications. As an association, PPI focuses ...


    By TRIC Tools Inc.

  • WaStop Access protects residents in Lewiston NY, USA - Case Study

    Location: Lewiston New York, USA Client: City of Lewiston Problem: The effect of combined sewers (combined wastewater and storm water) and an area prone to flooding from the Niagara River, a section of Upper Mountain Rd in Lewiston New York have experienced repeated flooded basements. On a visit with Jeffery Ritter of the City of Lewiston, Bob ...


    By Wapro AB

  • A methodology for linking 2D overland flow models with the sewer network model SWMM 5.1 based on dynamic link libraries

    Pluvial flooding in urban areas is characterized by a gradually varying inundation process caused by surcharge of the sewer manholes. Therefore urban flood models need to simulate the interaction between the sewer network and the overland flow in order to accurately predict the flood inundation extents. In this work we present a methodology for linking 2D overland flow models with the storm ...


    By IWA Publishing

  • 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) ...

  • Dropshaft cascades in urban drainage systems

    Dropshaft cascades are typical elements of sewer systems in steep urban catchment basins. The design of a dropshaft cascade, which is generally addressed as an optimization problem, also needs to consider the subsequent effects induced on the flow by the different elements of the cascade. Experimental research has been performed at the hydraulic engineering laboratory of the University of ...


    By IWA Publishing

  • Shaw Pipeline - Case Study

    OEM mods allow upsize of 40-foot stretch of sewer pipe beneath busy downtown intersection Challenge Upsize 40 critical feet of 8-inch clay sewer main to 14-inch HDPE beneath a busy downtown intersection, without resorting to excavation. Solution We significantly modified our M100 puller to fit inside a ...


    By TRIC Tools Inc.

  • 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.

  • Assessment of flood hazard in a combined sewer system in Reykjavik city centre

    Short-duration precipitation bursts can cause substantial property damage and pose operational risks for wastewater managers. The objective of this study was to assess the present and possible future flood hazard in the combined sewer system in Reykjavik city centre. The catchment is characterised by two hills separated by a plain. A large portion of the pipes in the aging network are smaller ...


    By IWA Publishing

  • SMF4 case study 2

    Sewer Misconnection Survey Date: March 2010 Location: Edgebaston Birmingham UK Purpose: To test the application of the SMF4 portable fluorimeter in the detection and quantification of organic pollution from faecal matter in Surface water Sewers. Background STS was invited independently by the Environment Agency and Severn ...


    By Safe Training Systems Ltd

  • Hydrogen sulfide gas emission under turbulent conditions – an experimental approach for free-fall drops

    Odor nuisance and sulfide corrosion in sewers carrying septic wastewater are accelerated at points of turbulence such as drops in manholes, but accurate methods or empirical expressions to evaluate the gas stripping rate at those particular sites are still missing. With the aim of improving the current knowledge on the influence of free-fall drops on the release of hydrogen sulfide gas, an ...


    By IWA Publishing

  • Performance of sanitary sewer collection system odour control devices operating in diverse conditions

    Controlling odours from sanitary sewer systems is challenging as a result of the expansive nature of these systems. Addition of oxidizing chemicals is often practiced as a mitigation strategy. One alternative is to remove odorous compounds in the gases vented from manholes using adsorptive media. In this study, odour control devices located at manholes were observed to determine the ability of ...


    By IWA Publishing

  • Understanding the spatial formation and accumulation of fats, oils and grease deposits in the sewer collection system

    Sanitary sewer overflows are caused by the accumulation of insoluble calcium salts of fatty acids, which are formed by the reaction between fats, oils and grease (FOG) and calcium found in wastewaters. Different sewer structural configurations (i.e., manholes, pipes, wet wells), which vary spatially, along with other obstructions (roots intrusion) and pipe deformations (pipe sags), may influence ...


    By IWA Publishing

  • Local effects of global climate change on the urban drainage system of Hamburg

    The Hamburg Water Group owns and operates a sewer network with a total length of more than 5,700 km. There has been increasing attention paid to the possible impacts of predicted changes in precipitation patterns on the sewer network infrastructure. The primary objective of the work presented in this paper is an estimation of the hydraulic impacts of climate change on the Hamburg drainage ...


    By IWA Publishing

  • 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

  • Misconnections – Birmingham UK case study

    Background STS was invited independently by the Environment Agency and Severn Trent water to carry out a series of monitoring operations in an area which had a history of issues arising from the misconnection of waste water into a “clean” surface water sewer system. Traditionally surveys of this type are carried out using contractors who are tasked to lift manhole covers ...


    By Safe Training Systems Ltd

  • Case study - Kitchen extension in London

    This small detached house in North West London has enough roof to collect useful quantities of water and the owners have already shown that they are saving money. The Site Marilyn and Gerry Devine’s installation shows that you do not have to own a huge property to be able to benefit from rainwater harvesting. Their small detached house in North-West London has enough roof to ...

  • Case study - TV personality in the chilterns

    The GRAF Carat 6500 litre underground tank is installed under a spacious patio at the back of the house and the manhole cover is decked in the same sandstone slabs as the rest of the surface. The Site A television personality, whose identity is not published at his/her request, is delighted with the rainwater harvesting system at their new-build home in a quiet village in the ...

  • Whittier in Frederick, Maryland - Storm Water Treatment Underground Systems Meet Regulatory Requirements

    The Assisted Living Project at Whittier in Frederick, M.D. is a 6.3 acre retirement community situated next to Whittier Lake. Planned by Fox & Associates, it included special design considerations for a cost-effective and attractive means of treating stormwater. To detail the Whittier site, it is comprised of a retirement assisted living facility which is 19,151 sq. ft., a retirement medical ...


    By BaySaver Technologies, Inc.

  • Heat From Wastewater

    When it comes to using wastewater heat from channels, provision and evaluation of hydraulic and thermal wastewater data is urgently needed prior to planning and implementation of facilities. Knowing the wastewater temperatures as well as the flow rates - particularly as dry weather discharge – is an indispensable component. It is therefore essential to carry out preliminary measurements ...


    By NIVUS GmbH

  • Kijlstra’s precast CSOS lead the way

    As ever, time is money in the civil engineering industry and anything which can deliver high quality results in double-quick time is worth investigating. Hence in the specialised business of storm drainage and flood attenuation – currently a rare growth area in the industry – engineers and contractors are catching on to the considerable advantages of using pre-cast concrete ...


    By Kijlstra LTD.

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