INFRA 2014
1er au 3 décembre, Palais des Congrès, Montréal
La présentation est en français mais le PowerPoint NYC Advanced Analytical Sewer and Water Main Replacement Planning est en version anglaise.
Biographie de la conférencière : Annie Vanrenterghem-Raven, InfraPLAN
Ms. Vanrenterghem-Raven is the Owner and Managing Director of infraPLAN, a NYC-based firm she created in 2008 that helps water utilities create Asset Management programs. The goal is to, ultimately, identify and justify long-term investments, and select short-term projects based on risk.Prior to starting infraPLAN she was an Associate Research Professor at NYU School of Engineering working closely with EU-based research labs. For the last 18 years, Ms. Raven’s research and consulting work has focused on advanced analytical approaches, allowing utilities to use and analyze their own data and create plans that are therefore analytical, risk-based and utility-specific. Ms Raven’s undergraduate education is in Math and Physics; she holds a Master’s degree in Structural Eng. from ESTP, Paris, France; an MPH in Environmental Sciences from Columbia U, and a PhD in Civil Eng. from NYU. She is a member of AWWA’s AM Committee where she chairs the abstract sub-committee.
Résumé de la conférence
The author participated in a project for the NYCDEP Bureau of Water & Sewer Operations (“the Bureau”) in view of helping them evaluate the needs for rehabilitation of their sewers (4,565 miles of combined sewers and 1,254 miles of storm sewers) and water mains (6,790 miles) until 2050, as well as prioritize the projects. The prime consulting firms were ARCADIS and D&B engineers and Architects. The project lasted 14 months (February 2012 – March 2013), a noteworthy timeframe given the size of the system, the quantity of data processed, the range of results produced, and the advanced approaches adopted with no assumption made regarding key information (Likelihood of Failure, LOF, or Expected Useful Lives, EUL). In effect, all results were obtained using utility-specific data; with more or less certainty depending on data quality and availability. The Bureau was active in the collection and preparation of data). Bureau’s employees were also trained at using one of the tools previously calibrated by the author. This will allow the Bureau to update results in the future.
In this presentation the author describes the overall approach:
- Review of data availability, analysis and formatting - GIS-based determination of the Consequences of Failure (COF)
- Analysis of costs (repair and rehabilitation)
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Statistical failure analysis:
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Regrouping of mains and sewers
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Determination of LOF
- Determination of EULs for each previously-defined group of mains and sewers
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- Determination of the Rehabilitation Needs meeting the service levels set by the Bureau Assignment of a risk-based priority score (LOF x COF) for each pipe.
Deliverables also included recommendations regarding data collection and formatting in order to facilitate and improve results reliability of future projects.
