manhole Articles

  • Manhole Relining in the Keystone State

    Manhole Relining in the Keystone State Mt. Carmel (Pa.) Board of Trustees Turns to Epoxy Lining to Save Failing Structures Exerpts from Trenchless Technology Magazine, September 2005 issue Given that estimates for the total amount of sanitary sewer pipes in the United States top 500,000 miles, it is easy to understand how sometimes manholes can be overlooked. But manholes are a big ...

  • Porirua New Zealand – WaStop® DN225 - Case Study

    Porirua City located 20 km north of Wellington has over 70 storm water outlets into the harbour. A number of these outlets are very flat on their approach to the harbour which generally means they are severely influenced by high tides. The problem with these outlets is that if a rain fall event coincides with a high tide, the ability of the storm water network to discharge is severely restricted. ...


    By Wapro AB

  • 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.

  • How Tempe Controls Manhole Odors

    Untitled Document Summary: The adjacent cities of Tempe and Mesa, Arizona, rely on a combined wastewater collection system comprising 434 miles of sanitary sewer lines and more ...


    By Calgon Carbon Corporation

  • Development and Deployment of a Real-Time Remote Continuous Monitoring System for Manholes

    A new system for the detection of septic sewer overflows (SSOs) and unauthorized intrusions of manholes has been developed jointly with public water agencies in San Diego County, California. The goal of the project is to provide detection of SSOs early enough to deploy personnel to provide preventative action. The system has been in operation since May of 2005 and has detected and, with field ...

  • The HERMES TECHNOLOGIE System For Manhole Cover Repair And Regulation On Streets

    The Problem Due to the heavy traffic or because of mistakes in the past construction and using wrong materials, we have the problem that manhole covers will collapse. On this way they become a dangerous area for the daily traffic. The Solution HERMES TECHNOLOGIE developed a System for easy workmanship including special materials and machines for ...


    By HERMES Technologie Ltd.

  • Balancing growth and conservation - Precast concrete manholes become part of the stormwater solution

    When American Fork, Utah, decided to approve construction of a 175-acre commercial center, the city engineers had to consider the environmental effect it would have on a 45-acre wetland right next door. Under the EPA´s Phase II Storm Water Rules, adapted in late 1999, almost any city large enough to require a storm sewer system must balance growth with the environmental impacts of ...


    By BaySaver Technologies, Inc.

  • M-Coating – drain & sewer spraylining the economical solution to manhole shaft renovation

    M-Coating – Procedure for renovating a manhole shaft using ERGELIT Kombina KS M-Coating is a new, innovative renovation technique for both round and rectangular drainage shafts from 500mm to 1200mm. It is based on over 15 years of the Hermes company’s experience. Using this centrifuge spray technique, walls of shafts up to 10 metres deep can be coated to a realistic thickness. ...


    By HERMES Technologie Ltd.

  • 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.

  • The Watertight Times -`What watertight connectors will do for your business`

    The Watertight Times is a series of short articles, in newspaper format,about actual construction jobs using A-lok connectors with insightful comments from owners and contractors about the advantages of using rubber connectors for pipe to manhole ...


    By A-Lok Products, Inc.

  • The Langer Connection

    The call came from a Kennedy township homeowner that the smell of raw sewage was in the air and they were tired of the smell. Dave Gasparovich went out and started walking the very hilly area (15% grade or more) in search of the culprit. What he found was incredible, incredibly bad. The 12 manholes he discovered in the woods had been installed in the late 70’s and were connected with clay pipe. ...


    By A-Lok Products, Inc.

  • 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.

  • Sensitivity analysis of surface runoff generation in urban flood forecasting

    Reliable flood forecasting requires hydraulic models capable to estimate pluvial flooding fast enough in order to enable successful operational responses. Increased computational speed can be achieved by using a 1D/1D model, since 2D models are too computationally demanding. Further changes can be made by simplifying 1D network models, removing and by changing some secondary elements. The Urban ...


    By IWA Publishing

  • 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

  • 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

  • Kijlstra brings bountiful benefits to UK's largest local authority highway project

    While the near completed bypass for Church Village in Rhondda Cynon Taf, South Wales, is bringing relief to the communities along the previously congested A473, the first use of a revolutionary manhole system is also making life easier for design and build contractor Costain. The contractor trialled more than 150 of Kijlstra’s square pre-cast concrete manholes on the three-year, £90 ...


    By Kijlstra LTD.

  • The use of deconvolution techniques to identify the fundamental mixing characteristics of urban drainage structures

    Mixing and dispersion processes affect the timing and concentration of contaminants transported within urban drainage systems. Hence, methods of characterising the mixing effects of specific hydraulic structures are of interest to drainage network modellers. Previous research, focusing on surcharged manholes, utilised the first-order Advection-Dispersion Equation (ADE) and Aggregated Dead Zone ...


    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

  • A no-brainer for drains

    Pre-fabricated drainage products have saved time and boosted safety on a Welsh road scheme Surface water drainage is not the most visible element of a new road scheme – after all, it’s almost entirely underground. But it is vitally important to any road and it’s one of the first priorities before work starts on the carriageway. At Costain’s £59 ...


    By Kijlstra LTD.

  • Modeling overland flows in InfoWorks CS

    A new tool within InfoWorks CS v7.5 enables the presentation of flood depths within the bounds of a polygon, otherwise known as a flood compartment. The flood level can be extended throughout the boundaries of the compartment, allowing it to be matched against a ground model to calculate flood depth. The new tool does not alter the way in which flood calculations are undertaken, it is instead a ...


    By Innovyze

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